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Fitment notes: Auxiliary 12V battery; located in front trunk; AGM required for start-stop and high electrical demands
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Every control module on the 2025-2026 Porsche Taycan Turbo S — 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.
Electric Motor Control Unit Rear (MCU-R)6.8 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Rear motor assembly, integrated with inverter housing above rear axle
🔧 PIWIS IV + PPN online
⚠️ Primary drive motor. Requires rear subframe lowering and HV lockout. Component protection to BMS and PECU.
Two-Speed Transmission Control Unit (TCU)4.2 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Rear motor transmission housing, integrated with rear drive unit
🔧 PIWIS IV + PPN online
⚠️ Controls 2-speed planetary gearbox on rear axle. Adaptive shift learning required after coding.
Onboard Charger Control Unit (OBC)3.0 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Front luggage compartment, right side integrated with PECU
🔧 PIWIS IV + PPN online
⚠️ 11 kW AC charger (22.5 kW optional). Charging system test required after replacement.
Electric Power Steering Control Unit (EPS)2.8 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Steering column, integrated with steering assist motor
🔧 PIWIS IV + PPN online
⚠️ Steering angle sensor calibration and straight-ahead position learning required after coding.
Rear Axle Steering Control Unit (RAS)2.2 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Rear subframe, center mounted above rear axle
🔧 PIWIS IV + PPN online
⚠️ Standard on Turbo S. Rear wheel alignment and steering angle calibration mandatory after replacement.
Porsche Communication Management Control Unit (PCM)2.0 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Dashboard, center stack behind 10.9-inch touchscreen
🔧 PIWIS IV + PPN online
⚠️ PCM 6.5 or later system expected. Navigation, Apple CarPlay, Android Auto. Requires online activation for premium features.
Thermal Management Control Unit (TMC)2.0 hr R&Rsecurity gateway +0.7 hr▸ programming details
📍 Front luggage compartment, center firewall
🔧 PIWIS IV + PPN online
⚠️ Controls battery cooling/heating, motor cooling, and cabin HVAC integration. Complex refrigerant system.
Anti-lock Brake System / Porsche Stability Management Control Unit (ABS/PSM)1.8 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Front luggage compartment, right side firewall
🔧 PIWIS IV + PPN online
⚠️ Integrated with regenerative braking coordination. Brake bleed and system calibration required after replacement.
Climate Control Unit (CCU)1.8 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Dashboard, center stack behind climate control panel
🔧 PIWIS IV
⚠️ 3-zone automatic climate control. Heat pump system on electric vehicle requires refrigerant handling certification.
Porsche Dynamic Light System Plus Control Unit Right (PDLS-R)1.5 hr R&Rdealer / factory tool +0.4 hr▸ programming details
📍 Right headlight assembly, integrated in housing
🔧 PIWIS IV
⚠️ LED matrix headlight. Headlight aim calibration required. Left and right modules are not interchangeable.
📍 Dashboard, behind steering wheel in instrument binnacle
🔧 PIWIS IV + PPN online
⚠️ Fully digital 16.8-inch curved display. Mileage programming requires online authentication and legal documentation. 2025+ may have updated display hardware.
Central Gateway Control Unit (CGW)1.5 hr R&Rsecurity gateway +1.5 hr▸ programming details
📍 Dashboard, left side behind lower trim panel near fuse box
🔧 PIWIS IV + PPN online
⚠️ Security gateway enforces component protection. Replacement requires all modules to be re-coded and authenticated.
Airbag Control Unit (ACU)1.2 hr R&Rsecurity gateway +0.6 hr▸ programming details
📍 Center console, below center stack behind trim panel
🔧 PIWIS IV + PPN online
⚠️ Crash data must be cleared. All airbag components must be verified/replaced before coding will complete.
Door Control Unit Passenger (DCU-P)1.2 hr R&Rdealer / factory tool +0.4 hr▸ programming details
📍 Passenger door, lower section behind door panel
🔧 PIWIS IV
⚠️ Controls window, mirror, lock, and soft-close functions. Window initialization required after coding.
Adaptive Cruise Control Radar Control Unit (ACC)1.2 hr R&Rsecurity gateway +0.6 hr▸ programming details
📍 Front bumper, center behind lower grille
🔧 PIWIS IV + PPN online
⚠️ Long-range radar for adaptive cruise and collision avoidance. Radar alignment required after replacement.
Porsche Connect Control Unit (PCU)1.0 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Rear parcel shelf area, left side behind trim
🔧 PIWIS IV + PPN online
⚠️ 5G modem expected on 2025+ models. Requires SIM activation and online subscription validation.
Park Assist Control Unit (PAU)0.8 hr R&Rdealer / factory tool +0.4 hr▸ programming details
📍 Rear luggage area, left side behind trim panel
🔧 PIWIS IV
⚠️ Controls ultrasonic parking sensors front and rear. Sensor calibration required after coding.
Front Camera Control Unit (FCU)0.8 hr R&Rsecurity gateway +0.5 hr▸ programming details
📍 Windshield, top center behind rearview mirror
🔧 PIWIS IV + PPN online
⚠️ Lane keeping, traffic sign recognition, and driver assistance. Windshield calibration required after replacement.
Keyless Entry and Start System Control Unit (KESSY)0.8 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Center console, integrated with start button assembly
🔧 PIWIS IV + PPN online
⚠️ All keys must be present for programming. Lost key requires online authorization and proof of ownership.
Seat Memory Control Unit Passenger (SMP)0.6 hr R&Rdealer / factory tool +0.3 hr▸ programming details
📍 Passenger seat, under seat base right side
🔧 PIWIS IV
⚠️ 14-way power adjustable passenger seat. Memory positions stored in module.
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 Porsche Taycan Turbo S Electric 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.