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🌍 International coverage, work in progress. This European-market vehicle is part of our hand-curated international catalog. We are filling in labor times, torque specs and fluids as fast as we can verify them, so some numbers may be missing or marked estimated for now. Do you work on these vehicles in the EU, Russia, or the JDM scene? Help us get it right: send real shop times or corrections to [email protected], or request the data you need and it joins the verification queue.

2015–2026 AUDI A4

2.0L I4 TDI•FWD•diesel•DETA•turbo
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Control Modules — 2015–2026 Audi A4

Every control module on the 2018-2023 Audi A4 — 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.
Transmission Control Module (TCM / Mechatronic)4.5 hr R&Rdealer / factory tool +1.0 hr▸ programming details
📍 Inside transmission oil pan (mechatronic unit) for S tronic/DSG; external on valve body for conventional automatics
🔧 ODIS Service with online authentication
⚠️ Mechatronic replacement requires transmission fluid change, adaptation, and clutch learning. SGW-locked.
Electric Power Steering Control Module (EPS)2.5 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Steering column, integrated with steering rack or column assembly
🔧 ODIS Service
⚠️ Steering angle sensor calibration required after replacement. SGW-locked.
Head-Up Display Control Module (HUD)2.0 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Dashboard, top center behind instrument panel (if equipped)
🔧 ODIS Service
⚠️ Display alignment and brightness calibration required. Component protection active. SGW-locked.
Body Control Module / Onboard Power Supply Control Module (BCM / OBSM)1.8 hr R&Rdealer / factory tool +1.0 hr▸ programming details
📍 Dashboard left side, integrated with fuse box or separate module behind kick panel
🔧 ODIS Service
⚠️ Controls convenience functions, lighting, power distribution. Component protection active. SGW-locked.
ABS/ESC Hydraulic Control Unit (ABS/ESC)1.5 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Engine bay, driver side near brake master cylinder
🔧 ODIS Service
⚠️ Brake bleeding required after replacement. Component protection active; SGW-locked.
Central Gateway Control Module (Gateway / CGW)1.5 hr R&Rdealer / factory tool +1.5 hr▸ programming details
📍 Dashboard, left side behind fuse panel or under driver footwell
🔧 ODIS Service with online authentication
⚠️ Master security module. Replacement requires VIN programming and all module re-adaptations. Critical SGW component.
MMI Control Module / Infotainment Head Unit (MMI)1.5 hr R&Rdealer / factory tool +0.8 hr▸ programming details
📍 Dashboard center stack or behind glove box depending on MMI generation
🔧 ODIS Service
⚠️ Component protection ties to VIN. Navigation/software updates require dealer account. SGW-locked.
All-Wheel Drive Control Module (AWD / Quattro Module)1.5 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Rear differential or transmission tunnel area (Quattro models only)
🔧 ODIS Service
⚠️ Quattro Ultra models with active AWD require calibration. SGW-locked.
Engine Control Module (ECM)1.2 hr R&Rdealer / factory tool +0.8 hr▸ programming details
📍 Engine bay, left side near firewall or mounted on top of engine depending on powertrain
🔧 ODIS Service or VAS 6154 with online gateway authentication
⚠️ SGW-locked; requires online dealer account. Component protection ties ECM to gateway VIN. Immobilizer adaptation mandatory.
Climate Control Module / A/C Control Unit (CCM / Climatronic)1.2 hr R&Rdealer / factory tool +0.3 hr▸ programming details
📍 Dashboard center, behind HVAC control panel
🔧 ODIS Service or VCDS (limited)
⚠️ Basic adaptations possible with VCDS; full coding requires ODIS. SGW may restrict some functions.
Adaptive Cruise Control Radar Module (ACC Radar)1.2 hr R&Rdealer / factory tool +0.8 hr▸ programming details
📍 Front bumper, center behind grille
🔧 ODIS Service with radar alignment tool
⚠️ Radar alignment and calibration mandatory after replacement. SGW-locked. Requires special alignment procedure.
Airbag Control Module (ACM)1.0 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Center console tunnel, beneath center armrest or under front seats
🔧 ODIS Service
⚠️ Crash data must be cleared. Component protection ties to VIN. SGW-locked.
Door Control Module (DCM)1.0 hr R&Raftermarket tool +0.2 hr▸ programming details
📍 Inside each door (driver, passenger, rear doors)
🔧 VCDS or Autel
⚠️ Window and mirror calibration required. Most aftermarket tools sufficient.
Kessy Control Module / Keyless Entry (Kessy)1.0 hr R&Rdealer / factory tool +0.8 hr▸ programming details
📍 Dashboard, center console area or steering column
🔧 ODIS Service
⚠️ Key programming and immobilizer adaptation mandatory. Component protection active. SGW-locked.
Adaptive Damping Control Module (CDC / Adaptive Suspe)1.0 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Rear cargo area or under rear seat, center
🔧 ODIS Service
⚠️ Ride height calibration required on air suspension models. SGW may restrict some functions.
Telematics Communication Unit (TCU / Audi Connect)1.0 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Rear cargo area, left side behind trim panel or under rear seat
🔧 ODIS Service
⚠️ Requires online activation and subscription pairing. SGW-locked.
Battery Management Control Module (BMC)0.8 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Battery area, trunk or under rear seat
🔧 ODIS Service
⚠️ Battery registration mandatory after replacement. Component protection active. SGW-locked.
Instrument Cluster / Virtual Cockpit (IC / Cluster)0.8 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Dashboard, behind steering wheel
🔧 ODIS Service
⚠️ Mileage programming requires dealer authentication. Virtual Cockpit models have additional calibration. SGW-locked.
Headlight Control Module / AFS (AFS / Headlight Modu)0.8 hr R&Rdealer / factory tool +0.3 hr▸ programming details
📍 Inside headlight assembly (one per side)
🔧 ODIS Service or VCDS
⚠️ LED/Matrix LED headlights have component protection. Headlight aim calibration required. SGW may restrict.
Park Assist Control Module (PLA / Park Assist)0.8 hr R&Raftermarket tool +0.3 hr▸ programming details
📍 Rear cargo area, left or right side behind trim
🔧 VCDS or Autel
⚠️ Sensor calibration required. Most aftermarket tools can code basic functions.
Seat Memory Control Module (Seat Module)0.8 hr R&Raftermarket tool +0.2 hr▸ programming details
📍 Under front seats (driver and passenger if equipped)
🔧 VCDS or Autel
⚠️ Seat position calibration required. Heated/ventilated seat functions may need adaptation.
Trailer Control Module (Trailer Module)0.8 hr R&Raftermarket tool +0.3 hr▸ programming details
📍 Rear cargo area, left side behind trim (if factory tow package equipped)
🔧 VCDS or Autel
⚠️ Trailer detection and lighting functions. Most aftermarket tools can enable/code.
Rear View Camera Control Module (RVC)0.6 hr R&Raftermarket tool +0.2 hr▸ programming details
📍 Rear liftgate or bumper, integrated with camera or separate module in cargo area
🔧 VCDS or Autel
⚠️ Calibration lines may require coding. Basic function usually plug-and-play.
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? Tell us — corrections ship fast here.
🔧 Built by master technician Chris Hackleman · Master Technician · 20+ years.
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