VIN / Build Split
VIN pos 4-7 identifies model/body/engine/steering. Position 4-5 = model series (e.g., VA = 3 Series). Position 7 = engine. BMW WMI: WBA, WBS, 5UX. Position 10 = model year code.
3,200+ Vehicles Supported
1-Year Unlimited Guarantee
DFW Mobile Service
DFW Serving Dallas / Fort Worth
2021 BMW 3-Series Supported Services
2021 BMW 3-Series
ADAS calibration, module programming, and security relearns
Trims: 330i, 330i xDrive, M340i, M340i xDrive, M3. Driving Assistant standard. Pro on M340i+.
Technical snapshot
- Platform CLAR (G20)
- CAN Architecture FlexRay, MOST, K-CAN, K-CAN2, K-CAN3, PT-CAN, PT-CAN2, Ethernet (EtherBoot on BDC builds)
- Security BMW ISN (Individual Serial Number) - FEM/BDC CAS3+/CAS4+; ISTA + dealer auth required for AKL
What do you need fixed?
Choose a service to start your quote.
OVERVIEW
Expert ADAS calibration, module programming, and diagnostic recovery for the 2021 BMW 3 Series. On this vehicle we cover documented systems include Active Driving Assistant - Frontal Collision Warning / Lane Departure Warning, Forward Radar (77GHz), and Blind Spot Detection (BSD) - Side Radar, this CLAR (G20) platform vehicle, BMW ISN / BDC-integrated immobilizer support, BMW iDrive 7 infotainment programming. Mobile across the DFW Metroplex; mail-in module service is available nationwide.
Platform
CLAR (G20)
Production
2006-present
Trim Levels
Trims: 330i, 330i xDrive, M340i, M340i xDrive, M3. Driving Assistant standard. Pro on M340i+.
Drivetrain
RWD / AWD
Engine
-
CAN Speed
FlexRay, MOST, K-CAN, K-CAN2, K-CAN3, PT-CAN, PT-CAN2, Ethernet (EtherBoot on BDC builds)
YEAR-SPECIFIC NOTES
Infotainment
BMW iDrive 7
Wireless Support
CarPlay: Yes
Exact-year service summary for 2021 BMW 3 Series
ADAS coverage
This 2021 BMW 3 Series page documents 4 ADAS systems, including Active Driving Assistant - Frontal Collision Warning / Lane Departure Warning, Forward Radar (77GHz), Blind Spot Detection (BSD) - Side Radar, and Hands-Free Driving (Highway Assistant).
View ADAS dataCalibration triggers
Documented calibration triggers include Windshield Replacement, Front Bumper Repair or Replacement, Rear Bumper Repair or Replacement, and DME Replacement. Use the ADAS tab for the full trigger list.
View triggersProgrammable modules
This page indexes 27 programmable module records across SRS, ECU, BCM, TCU/TCM, ABS, and IPC coverage.
View modulesGateway and security
This page includes 23 gateway, immobilizer, or key-security records for this 2021 BMW 3 Series.
View securityCore Auto Logic capability
Core Auto Logic supports exact-year diagnostics, ADAS calibration, module programming, and security-access planning for the 2021 BMW 3 Series using the documented systems and module data on this page.
Choose a sectionWhat changes on this exact year
Feature availability
M3 G80 Introduction - Standard; Driving Assistant Professional - Optional
Driver-assist suite
BMW Driving Assistance Package / Driving Assistance Professional Package
VIN and build split
VIN pos 4-7 identifies model/body/engine/steering. Position 4-5 = model series (e.g., VA = 3 Series). Position 7 = engine. BMW WMI: WBA, WBS, 5UX. Position 10 = model year code.
Infotainment context
BMW iDrive 7; BMW Live Cockpit Professional / iDrive 7 (standard G20)
Connectivity notes
Wireless CarPlay: Yes
Network and access
CAN: FlexRay, MOST, K-CAN, K-CAN2, K-CAN3, PT-CAN, PT-CAN2, Ethernet (EtherBoot on BDC builds)
Tool access for this exact year
Representative tool access paths for this exact model year, gated by the vehicle data and source packet we currently trust.
Factory scan, coding, and calibration access
BMW ISTA-D / BMW ISTA-P
Factory routines and secure server authorization control this path when aftermarket coverage is not enough for the VIN.
ADAS scan, setup, and verification
Autel, Launch Tech, Topdon
Used where aftermarket coverage supports the procedure; OEM software remains required for locked factory routines.
Bench cloning and chip-level recovery
Alientech / Autotuner / Orange5 / Scanmatik / Flex / VVDI2 / PCMFlash / CGDI / X-Prog
Used only when the module, donor data, EEPROM, MCU, or crash-data workflow requires bench or chip-level handling.
Bench/chip-level only
Choose a section to view data
SUPPORTED SYSTEMS
What we service on this vehicle
Documented module coverage for the 2021 BMW 3-Series. Counts reflect modules our techs have programmed or calibrated on this exact platform.
ADAS Calibration
4 modules documented
Forward camera, radar, surround-view and lane-keep recalibration after windshield, suspension or fascia work.
Open ADAS tabEngine / ECU Programming
3 modules documented
Powertrain reprogramming, calibration updates, replacement ECU configuration and security access.
Open Modules tabBCM / Body Programming
2 modules documented
Body control module, gateway and accessory programming. Includes feature-bit reconfiguration.
Open Modules tabGateway / Security Access
21 modules documented
Secure gateway module identification, bypass workflow and security-access planning before programming.
Open Security tabTCU / Transmission
1 module documented
Transmission control module reprogramming, adaptive learning reset and replacement TCM clone.
Open Modules tabSRS / Airbag Reset
15 modules documented
Crash-data clear, hard-code reset and replacement airbag module configuration.
Open Modules tabABS / Brake Module
1 module documented
ABS / EBCM bleed support, replacement module coding and yaw-rate sensor calibration.
Open Modules tabIPC, SAS & Other Modules
2 modules documented
Instrument cluster cloning, steering angle sensor calibration and other supporting modules.
Open Modules tabConnectivity & Accessories
3 modules documented
Infotainment radio, surround view, remote start, trailer brake controller and other equipped systems.
Open Modules tabRecalibration Triggers
10 modules documented
Service events that require ADAS recalibration on this vehicle. Tap to see what triggers what.
Open ADAS tabNeed something not listed? Most undocumented modules can still be programmed.
Get a QuoteFeature availability 2
M3 G80 Introduction
StandardG80 M3 enters production 2021. S58 engine, xDrive option, M-specific BDC, carbon roof on Competition.
Driving Assistant Professional
OptionalStandard on M3. Optional on M340i. Full highway assist suite - requires all ADAS sensors calibrated.
WHAT WE RESOLVE
Common issues on this vehicle
Common BMW 3 Series issues we resolve on this platform: Active Driving Assistant - Frontal Collision Warning / Lane Departure Warning, Forward Radar (77GHz), Blind Spot Detection (BSD) - Side Radar, and Hands-Free Driving (Highway Assistant) recalibration after windshield/bumper/suspension/CCM service. Module programming for replacement ECU/PCM, BCM, TCU, or accessory modules - CLAR (G20) platform uses FlexRay, MOST, K-CAN, K-CAN2, K-CAN3, PT-CAN, PT-CAN2, Ethernet (EtherBoot on BDC builds).
ADAS CALIBRATION MATRIX
ADAS systems on this vehicle
BMW Driving Assistance Package / Driving Assistance Professional Package
Scroll for part numbers and Details
| System | Type | Category | Cal. Type | Supported | Part # | Actions |
|---|---|---|---|---|---|---|
| Active Driving Assistant - Frontal Collision Warning / Lane Departure Warning | Forward Camera | Camera | None | YES | 66536-7927456 | |
| Forward Radar (77GHz) | Front Radar | Radar | Static | YES | 66316-8798014 | |
| Blind Spot Detection (BSD) - Side Radar | Side Radar | Radar | Static + Dynamic | YES | 66326-9261495 (L), 66326-9261496 (R) | |
| Hands-Free Driving (Highway Assistant) | Forward Camera | Camera | Static + Dynamic | YES | 66536-7927456 |
ADAS SYSTEM
YES Supported
Identification
- System type
- Module category
- Sensor location
Part Numbers
- OEM
- Alternative
Calibration & Triggers
- Calibration type
- Programming approach
- Requires PMI
- Trigger events
Technical Notes
- Chip / MCU
- Service notes
Need this calibrated?
Get a quote for ADAS calibration WHEN IS CALIBRATION REQUIRED?
Triggers for ADAS recalibration
Windshield Replacement Affected: KAFAS 3 Camera, Lane Departure Warning, Frontal Collision Warning, Active Cruise Control
KAFAS 3 mono camera requires static target calibration followed by dynamic road drive via ISTA. Use only OEM-approved windshield glass - non-OEM glass may cause calibration failure due to rake angle or tint variance. Reinstall camera bracket precisely per ISTA mounting spec.
Front Bumper Repair or Replacement Affected: FRSF Front Radar, Adaptive Cruise Control, Pre-Collision
ISTA static radar alignment required after front bumper work. Vehicle at curb weight on level surface. Inspect radar mounting bracket for deformation. FRSF radar aim out-of-tolerance triggers DTC 48A0 and disables ACC.
Rear Bumper Repair or Replacement Affected: BSD Side Radar (L/R), Blind Spot Detection
BSD rear corner radar modules require ISTA coding verification after any rear bumper work. Static calibration required if module was removed or replaced. Confirm sensor covers are flush post-reinstall.
DME Replacement Affected: Engine Management, Immobilizer, ISN Synchronization
ISN adaptation mandatory after any DME replacement. ISTA SDP flash required. CAS/FEM/BDC ISN must match new DME ISN - failure to adapt will result in no-start condition. BMW dealer authorization or specialist ISN tool required.
FEM or BDC Replacement Affected: Immobilizer, Central Locking, Exterior Lighting, Key Programming
Full ISTA vehicle order coding required. ISN synchronization with DME mandatory. All keys must be re-adapted to new FEM/BDC. EtherBoot SDP flash on BDC-equipped builds.
Any Collision Affected: SRS Airbag Module, KAFAS 3, FRSF Radar, BSD Radar, DSC
Full ISTA module scan mandatory post-collision. SRS module replace-only after hard deployment. Check all ADAS sensor mounting integrity. Clear DTCs only after physical inspection of all sensor brackets and connectors.
Wheel Alignment / Suspension Work Affected: FRSF Front Radar, BSD Side Radar, DSC Steering Angle Sensor
Any suspension height change or alignment work may shift radar aim angles. ISTA radar static calibration and DSC steering angle sensor recalibration recommended after suspension work.
Forward Radar Replacement
Radar module replacement requires alignment/calibration using ISTA+.
BSM Sensor Replacement
Blind spot monitoring sensor replacement requires calibration using ISTA+.
Mirror Replacement
If BSD sensor is mirror-integrated, recalibration required. Verify sensor location; use ISTA+ if applicable.
SRS Modules
Advanced Crash Safety Module (ACSM) 15 records
Under center console
- Part number
- 65.77935000201(A2C37764805)
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 65779247024
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 65779280185
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 65779253636
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 65779343687
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 65779350003
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 65779253637
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 6577929649401
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 65779343686
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 65779385025
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 65779385028
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 65779319493
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 6577934872601
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 65.77934872601
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
Under center console
- Part number
- 65779280186
- Location
- Under center console
- Manufacturer
- Continental
- Notes
- Requires ISTA/D or compatible tool for coding. VIN must be programmed to replacement module. Transport mode must be deactivated. Disconnect battery and wait 10 minutes before removal.
ECU Modules
DME - B48B20 2.0L (330i) 12146-8652015
- Part number
- 12146-8652015
- Protocol / method
- ISTA SDP
- Coding required
- Yes
- Cloning supported
- No
- Chip / MCU
- Bosch MG1CS003
- Notes
- ISTA SDP flash required. ISN (Individual Serial Number) in DME must match CAS/FEM/BDC - ISN adaptation is mandatory after DME replacement. Specialist ISN tools (AUTEL IM608 Pro, Autologic, or BMW ISTA with dealer auth) required to read/write ISN. Battery must be at sufficient charge before SDP flash. Do not interrupt flash - EtherBoot on BDC-equipped builds. Aftermarket DME requires ISN adaptation or vehicle will not start.
DME - B58B30 3.0L I6 (M340i / M340i xDrive) 12146-8491100
- Part number
- 12146-8491100
- Protocol / method
- ISTA SDP
- Coding required
- Yes
- Cloning supported
- No
- Chip / MCU
- Bosch MG1CS003
- Notes
- Same ISN adaptation requirement as B48 DME. ISTA SDP required.
DME - S58 3.0L I6 Bi-Turbo (M3 / M3 Competition)
- Protocol / method
- ISTA SDP
- Coding required
- Yes
- Cloning supported
- No
- Chip / MCU
- Bosch MG1CS003
- Notes
- M3-specific S58 DME. ISN adaptation mandatory. ISTA SDP flash. BMW M-specific dealer authorization may be required for M3 DME replacement. Do not use non-M DME in M3 - hardware and software are distinct.
BCM Modules
Body Domain Controller (BDC) 61356-9472831
- Part number
- 61356-9472831
- Security
- BMW ISN / FEM-BDC
- Coding required
- Yes
- Cloning supported
- No
- Notes
- BDC present on later G20 production builds - verify via VIN production date in ISTA (earlier builds use FEM). ISTA SDP required for coding and ISM (immobilizer) adaptation. ISN synchronization between BDC and DME mandatory after replacement. Clone not supported - new BDC must be coded via ISTA with vehicle order data. EtherBoot (Ethernet-based SDP flash) required on BDC-equipped builds.
FEM - Front Electronic Module
- Security
- BMW ISN / CAS
- Coding required
- Yes
- Cloning supported
- No
- Notes
- FEM present on earlier G20 production builds. Check VIN production date in ISTA to determine FEM vs BDC. ISTA SDP coding required. Immobilizer adaptation to DME via ISN. FEM controls central locking, power windows, exterior lighting logic, and immobilizer gateway. Replacement requires full ISTA vehicle order coding session.
TCU / TCM Transmission Modules
TCU - ZF 8HP51 8-Speed Auto 24008950
- Part number
- 24008950
- Protocol / method
- OBD
- Coding required
- Yes
- Cloning supported
- No
- Chip / MCU
- Infineon Tricore TC277
- Notes
- Requires ISTA+ for programming. ZF Lifeguard 8 fluid. Online coding required. Security gateway active.
ABS / Brake Modules
DSC - Dynamic Stability Control Module 34526-792829
- Part number
- 34526-792829
- Cloning supported
- No
- Notes
- Bosch DSC unit. ISTA coding required after replacement. Hydraulic bleed procedure required post-replacement - use ISTA automated bleed cycle. Steering angle sensor recalibration required via ISTA after DSC replacement. DTC 5E20 common if wheel speed sensor connector disturbed during removal. Part number approximate - verify via VIN in BMW EPC.
Other Modules (IPC, SAS)
Instrument Panel Cluster (IPC) 62108739999
- Part number
- 62108739999
- Cloning supported
- Yes
- Notes
- 62108747999 (G20 Live Cockpit Pro
Steering Angle Sensor (SAS)
- Coding required
- Yes
- Notes
- INTEGRATED (ZGM steering column)
Connectivity & Accessories
Head-Up Display (HUD) 62306-9452494
- Part number
- 62306-9452494
- Notes
- ISTA coding required after HUD module replacement. HUD angle calibration required - ISTA guided procedure.
Digital Instrument Cluster (Live Cockpit Professional) 62106-9475024
- Part number
- 62106-9475024
- Notes
- ISTA SDP coding required. VIN adaptation and vehicle order data written during coding. 12.3 inch fully digital cluster standard on most G20 trims.
Harman Kardon Audio System
- Notes
- ISTA coding required after amplifier or head unit replacement.
Gateway / Security Modules
Central Gateway Module 21 records
- Manufacturer
- Renesas
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- R7F701057
- Notes
- Compatibility label: EVO. AMP Notes: Read/Write
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XET512
- Notes
- Compatibility label: 7 series F01. FRM-Foot Space
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- Compatibility label: E series. FRM-Foot Space Notes: Read/Write
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XDT256
- Notes
- Compatibility label: E70 AHL. FRM-Foot Space Notes: 0L15Y
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- Compatibility label: E70 VDM. FRM-Foot Space Notes: 3M25J
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- Compatibility label: E70 XE. FRM-Foot Space Notes: 3M25J
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- Compatibility label: E81 E82 E88 XE. FRM-Foot Space Notes: 3M25J
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- Compatibility label: E87 BASIS. FRM-Foot Space Notes: 3M25J
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- Compatibility label: E87 E92 E93 AHL. FRM-Foot Space Notes: 3M25J
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- Compatibility label: E87 E92 E93 XE. FRM-Foot Space Notes: 3M25J
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- Compatibility label: E89 E9X LED AHL. FRM-Foot Space Notes: 3M25J
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- Compatibility label: E89 E9X LED XE. FRM-Foot Space Notes: 3M25J
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- Compatibility label: E90 E91 LED BASIS. FRM-Foot Space Notes: 3M25J
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XET512
- Notes
- Compatibility label: F series. FRM-Foot Space Notes: Read/Write
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XET512
- Notes
- Compatibility label: F18. FRM-Foot Space
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- Compatibility label: MAX Brose. FRM-Foot Space Notes: 3M25J
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- Compatibility label: R56 HIGH EKS. FRM-Foot Space Notes: 3M25J
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- Compatibility label: R56 R56 HIGH EKS. FRM-Foot Space Notes: 3M25J
- Manufacturer
- NXP / Freescale
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384
- Notes
- FRM-Foot Space BMW E Serices Notes: 3M25J, free code
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- CAS4/CAS4+
- Notes
- Compatibility label: CAS4/CAS4+. CAS4/CAS4+
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 9S12XEQ384(3M25J)
- Notes
- Compatibility label: BMW E Serices. Central gateway routes CAN/CAN-FD/Ethernet between module domains. Replacement requires VIN write and as-built configuration load via OEM software (ODIS, FDRS, DTS Monaco, etc.).
ARCHITECTURE & CONNECTIVITY
Architecture & Connectivity
- Body Construction
- Steel unibody with aluminum front subframe and suspension components
- OBD Protocol
- ISO 15765-4 CAN / BMW-specific UDS (ISTA required for full access)
- CAN Architecture
- FlexRay, MOST, K-CAN, K-CAN2, K-CAN3, PT-CAN, PT-CAN2, Ethernet (EtherBoot on BDC builds)
- Infotainment
- BMW Live Cockpit Professional / iDrive 7 (standard G20)
- OTA Capable
- No
- Infotainment Name
- BMW iDrive 7
- Wireless CarPlay
- Yes
- ECU/TCM Unlocking
- Contact us
- ECU/TCM Flashing
- Confirmed
Reviewed coverage: 2021 - 2.0L 318d (B47D20), 2.0L 318i (B48B20), 2.0L 320d (B47D20), 2.0L 320i (B48B20), 2.0L 330i (B48B20), 3.0L 330d (B57D30), 3.0L M340i (B58B30).
Confirm the exact engine, ECU, and any prerequisite access method before service.
OPENPILOT / COMMA.AI
Openpilot Compatibility
Not Supported
Not supported - bmw not in openpilot support tree
Not in openpilot support tree as of April 2026. BMW not in openpilot official tree. No community port has been merged.
FREQUENTLY ASKED QUESTIONS
FAQ
How much does ADAS calibration cost for a 2021 BMW 3 Series?
ADAS calibration pricing for a 2021 BMW 3 Series depends on which of its 4 documented systems need work after a repair. This vehicle is documented with Active Driving Assistant - Frontal Collision Warning / Lane Departure Warning, Forward Radar (77GHz), Blind Spot Detection (BSD) - Side Radar, and Hands-Free Driving (Highway Assistant). We provide a fixed quote after confirming the operations performed - send the VIN, the repair scope (windshield R&R, bumper work, alignment, collision), and any DTCs so the quote response can include a real number.
Can you reset the airbag light on a 2021 BMW 3 Series?
Yes. The 2021 BMW 3 Series uses a factory SRS control module that we support. We read and clear stored crash data, then restore the module to factory status so the airbag warning light goes out and the system returns to full operation. Reference part number on this vehicle: 65.77935000201(A2C37764805). Mobile diagnosis and programming are available in DFW, and mail-in module service is available nationwide. Send the part number and a description of what triggered the light, and we will provide a quote and scheduling window.
What is needed after replacing the windshield on a 2021 BMW 3 Series?
After windshield replacement on a 2021 BMW 3 Series, Active Driving Assistant - Frontal Collision Warning / Lane Departure Warning and Forward Radar (77GHz) rely on the forward-facing camera and require recalibration before the systems return to operation. We perform the calibration on-site in the DFW Metroplex with OE target fixtures. Mail-in module service is available nationwide for eligible module work.
How long does a 2021 BMW 3 Series module service take?
Most 2021 BMW 3 Series onsite jobs are typically scheduled within 24-48 hours once vehicle readiness, access, and route timing are confirmed. This vehicle has roughly 34 programmable modules documented in our database (3 ECU, 2 BCM, 1 TCU, 1 ABS, plus IPC/SAS/gateway/accessory). Mobile module work and ADAS calibration are scheduled in the DFW service area after quote review. Mail-in module service is available nationwide.
Do you cover the 2021 BMW 3 Series on-site, or is this mail-in only?
We run a mobile unit across the DFW Metroplex for on-vehicle work (ADAS calibration, post-repair recoding, and supported module work). Mail-in module service is available nationwide. Quote the work and we will confirm the active service path for the 2021 BMW 3 Series. Do not ship a module unless support confirms next steps.
What kind of warranty do you offer on 2021 BMW 3 Series programming?
Every programming, cloning, and calibration job on the 2021 BMW 3 Series is backed by a workmanship warranty covering the scope of work we performed: 1-year unlimited on all flashes, clones, and ADAS calibrations. If a module we programmed or a calibration we performed fails to function as expected, return it and we restore it at no charge. The warranty covers our work; it does not cover unrelated mechanical or electrical failure of the module itself.
Which modules on a 2021 BMW 3 Series can you actually service?
We program, clone, repair, or replace the full programmable-module stack on a 2021 BMW 3 Series. For this vehicle our database documents:
- 3 engine control (ECU/PCM)
- 1 transmission control (TCU/TCM)
- 2 body control (BCM and related)
- 1 ABS / brake control (EBCM)
- 1 immobilizer / security
- 1 key & fob
- 1 instrument cluster (IPC)
- 1 steering angle sensor (SAS)
- 4 ADAS module
Infotainment on this platform: BMW iDrive 7. Send the VIN and the operations performed and we will confirm support and pricing.
Additional Module Part Numbers
Additional OEM-sourced part numbers for the 2021 BMW 3-Series covering ADAS, ECU/PCM, BCM, TCU/TCM, SRS, ABS/EBCM, instrument cluster (IPC), gateway, and steering angle sensor modules when available. These reference numbers assist technicians with module identification and sourcing prior to programming.
- ADAS Module Part Numbers
- 66536-7927456, 66316-8798014, 66326-9261495 (L), 66326-9261496 (R)
- ECU / PCM Part Numbers
- 12146-8652015, 12146-8491100, M340I XDRIVE)
- BCM / Body Module Part Numbers
- 61356-9472831
- TCU / TCM Part Numbers
- 24008950
- SRS / Airbag Module Part Numbers
- 65.77935000201(A2C37764805), 65779247024, 65779280185, 65779253636, 65779343687, 65779350003, 65779253637, 6577929649401, 65779343686, 65779385025, 65779385028, 65779319493, 6577934872601, 65.77934872601, 65779280186
- ABS / EBCM Part Numbers
- 34526-792829 (BMW DSC CLAR G-SERIES BOSCH 9.3)
- Instrument Cluster (IPC) Part Numbers
- 62108739999, 62108747999 (G20 LIVE COCKPIT PRO)
- Transmission Control Module (TCM) Part Numbers
- 24008950
Part numbers are OEM base references. Verify exact suffix via VIN-specific build data before ordering. Core Auto Logic provides mobile programming services for all listed modules in the DFW area.
Different trim or build?
Send your VIN and we'll confirm exact module support and pricing in the quote response.
Hit a security wall? We've got the keys.
1-year unlimited warranty on every flash and calibration.
Shared module fitment
Vehicles sharing modules with the 2021 BMW 3 Series
These vehicles use one or more of the same replacement modules indexed for this vehicle.
Finish the repair
Need help finishing this repair?
Get onsite help in Dallas-Fort Worth. Ask about same-day availability or a one-time remote session for eligible non-VSP work.
BMW ISTA Explore one-time factory coding and programming. We confirm the software and procedure for your vehicle. Module programming & recovery Replacing a module or dealing with a failed programming attempt? Send the part numbers and fault scan for review. Onsite tools & equipment Bring in a technician or ask about hourly, daily and weekly rentals where licensing and equipment availability allow.