Fitment notes: AGM battery required; located in trunk; register battery replacement with DME
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Every control module on the 2022-2026 BMW 740i — 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 Unit (TCU)6.5 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Transmission housing, integrated valve body
🔧 BMW ISTA + ICOM Next
⚠️ Requires transmission removal; adaptation and VIN coding required; renamed from EGS to TCU in G-series
Electric Power Steering (EPS)3.5 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Steering column, integrated with steering rack
🔧 BMW ISTA + ICOM Next
⚠️ Requires steering angle sensor calibration and end-stop learning procedure
⚠️ Enhanced security gateway; replacement requires dealer-level authentication and full network reconfiguration
Active Cruise Control Radar (ACC)1.5 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Front bumper, center behind grille
🔧 BMW ISTA + ICOM Next
⚠️ Radar calibration and alignment required after replacement; supports Level 2 autonomous features; dealer-level operation
Electronic Damper Control / Integral Active Steering (EDC/VDC)1.5 hr R&Rdealer / factory tool +0.8 hr▸ programming details
📍 Trunk floor, right side or near rear axle
🔧 BMW ISTA + ICOM Next
⚠️ Adaptive suspension with air springs on some models; ride height calibration and damper initialization required
Camera and Driver Assistance System (KAFAS)1.2 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Windshield (front camera) and trunk lid (rear camera)
🔧 BMW ISTA + ICOM Next
⚠️ Multi-function camera system; includes lane departure, traffic sign recognition, and high beam assist; camera calibration required after replacement
Door Module (TRSVC)1.2 hr R&Raftermarket tool +0.3 hr▸ programming details
📍 Inside each door, behind door panel
🔧 Autel MaxiSys or BMW ISTA
⚠️ Four modules total; window initialization required after replacement
Digital Motor Electronics (DME)1.2 hr R&Rsecurity gateway +1.5 hr▸ programming details
📍 Engine compartment, rear firewall driver side
🔧 BMW ISTA + ICOM Next
⚠️ Requires ISN synchronization with CAS; dealer authentication mandatory for programming
⚠️ Basic VIN coding; most aftermarket tools can perform
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.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2026 BMW 740i 3.0L I6 Turbo B58 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years.