Every control module on the 2022-2026 BMW M3 — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
Integrated Heating/Air Conditioning (IHKA) 3.0 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Behind center dashboard, above transmission tunnel
🔧 BMW ISTA + ICOM Next
⚠️ Dashboard removal required; refrigerant recovery; 4-zone climate if equipped
Transfer Case Control (VTG) 3.0 hr R&R security gateway +0.8 hr ▸ programming details
📍 Under vehicle, center near transmission (xDrive models only)
🔧 BMW ISTA + ICOM Next
⚠️ M xDrive models only; vehicle lift required; adaptation drive cycle needed
Transmission Control Unit (TCU) 2.8 hr R&R security gateway +1.0 hr ▸ programming details
📍 Transmission bell housing, driver side
🔧 BMW ISTA + ICOM Next
⚠️ 8-speed ZF automatic; transmission removal required; extended adaptation drive cycle
Car Access System (CAS) 2.5 hr R&R security gateway +2.0 hr ▸ programming details
📍 Behind dashboard, center above steering column
🔧 BMW ISTA + ICOM Next
⚠️ All keys must be reprogrammed; ISN sync with DME mandatory; dashboard removal required; digital key support
Electric Power Steering (EPS) 2.2 hr R&R security gateway +1.0 hr ▸ programming details
📍 Steering column, under dashboard
🔧 BMW ISTA + ICOM Next
⚠️ M-specific variable steering ratio; steering angle sensor and torque calibration required
Head Unit / Central Information Display (HU/EVO) 2.0 hr R&R security gateway +0.8 hr ▸ programming details
📍 Behind center dashboard screen
🔧 BMW ISTA + ICOM Next
⚠️ iDrive 8.0 system; large curved display; navigation and user data transfer needed
Front Electronic Module (FEM) 1.8 hr R&R security gateway +1.5 hr ▸ programming details
📍 Engine bay, passenger side near firewall
🔧 BMW ISTA + ICOM Next
⚠️ Replaces FRM on G-series; controls lighting, wipers, windows, HVAC; VIN coding mandatory
Active Cruise Control Radar (ACC) 1.5 hr R&R security gateway +0.8 hr ▸ programming details
📍 Front bumper, center behind grille
🔧 BMW ISTA + ICOM Next
⚠️ Radar alignment and calibration required after replacement; bumper removal needed
Dynamic Stability Control (DSC) 1.5 hr R&R security gateway +0.8 hr ▸ programming details
📍 Engine bay, driver side near brake master cylinder
🔧 BMW ISTA + ICOM Next
⚠️ Integrated with M-specific traction control; brake bleeding and calibration required
Door Module (TRSVC) 1.2 hr R&R dealer / factory tool +0.3 hr ▸ programming details
📍 Inside each door (four modules total)
🔧 BMW ISTA + ICOM Next
⚠️ Window, mirror, and soft-close calibration required
Digital Motor Electronics (DME) 1.2 hr R&R security gateway +1.5 hr ▸ programming details
📍 Engine bay, rear firewall driver side
🔧 BMW ISTA + ICOM Next
⚠️ Enhanced security on G-series; ISN sync with CAS mandatory; S58 engine-specific calibration
Central Gateway Module (ZGW) 1.2 hr R&R security gateway +2.0 hr ▸ programming details
📍 Behind glove box, passenger side
🔧 BMW ISTA + ICOM Next
⚠️ Enhanced security gateway on G-series; replacement requires dealer authentication and full vehicle recoding; Ethernet backbone
Adaptive LED Headlight Module (AHL) 1.2 hr R&R security gateway +0.5 hr ▸ programming details
📍 Each headlight assembly (left and right)
🔧 BMW ISTA + ICOM Next
⚠️ Laser light option available; headlight aim and matrix calibration required; very expensive modules
Roof Function Center (FZD) 1.0 hr R&R dealer / factory tool +0.3 hr ▸ programming details
📍 Headliner, center above rear seats
🔧 BMW ISTA + ICOM Next
⚠️ Controls sunroof, interior lighting, and sensors; headliner removal required
Camera Module / Surround View (KAFAS/TVM) 1.0 hr R&R security gateway +0.5 hr ▸ programming details
📍 Windshield (front), trunk lid (rear), and side mirrors
🔧 BMW ISTA + ICOM Next
⚠️ KAFAS includes ADAS functions; camera calibration and alignment required; windshield replacement affects KAFAS
Instrument Cluster (KOMBI) 1.0 hr R&R security gateway +0.8 hr ▸ programming details
📍 Dashboard, behind steering wheel
🔧 BMW ISTA + ICOM Next
⚠️ Full digital display; mileage programming requires dealer authentication
Electronic Damper Control / Integral Active Steering (EDC) 1.0 hr R&R security gateway +0.5 hr ▸ programming details
📍 Trunk, passenger side rear panel
🔧 BMW ISTA + ICOM Next
⚠️ Adaptive M suspension; ride height and damper calibration required
Advanced Crash Safety Module (ACSM) 0.8 hr R&R security gateway +0.5 hr ▸ programming details
📍 Center console, under shifter trim
🔧 BMW ISTA + ICOM Next
⚠️ Battery disconnect required; crash data clearing requires dealer authentication
Seat Module (SM) 0.8 hr R&R dealer / factory tool +0.3 hr ▸ programming details
📍 Under each front seat (driver and passenger)
🔧 BMW ISTA + ICOM Next
⚠️ M sport seats with memory and heating/ventilation; coding recommended for full function
Telematics Communication Box (TCB) 0.8 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Trunk, driver side rear panel
🔧 BMW ISTA + ICOM Next
⚠️ 5G connectivity; ConnectedDrive services; eSIM programming required
Fuel Pump Control Module (EKPM) 0.5 hr R&R aftermarket tool +0.2 hr ▸ programming details
📍 Trunk floor, under spare tire well
🔧 Autel MaxiSys or BMW ISTA
⚠️ Basic adaptation usually sufficient
Park Distance Control (PDC) 0.5 hr R&R dealer / factory tool +0.3 hr ▸ programming details
📍 Trunk, center rear panel
🔧 BMW ISTA + ICOM Next
⚠️ Ultrasonic sensor calibration required
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour?
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