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Fitment notes: Battery located in front trunk (frunk); European Group 48 size; vented to exterior
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Every control module on the 1990-1994 Porsche 911 Carrera (964) — 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.
Tiptronic Control Unit (TCU)3.5 hr R&Rrelearn only +0.5 hr▸ programming details
📍 Transmission tunnel, above transmission
🔧 PST1/PST2
⚠️ Tiptronic-equipped vehicles only (optional from 1990); adaptive shift learning resets after replacement
Immobilizer Control Unit (Immobilizer)2.5 hr R&Rdealer / factory tool +1.0 hr▸ programming details
📍 Dashboard area, integrated with ignition lock housing
🔧 PST2
⚠️ Introduced 1993 MY for US market; requires key programming and DME pairing via dealer tool
Supplemental Restraint System Control Unit (SRS)2.0 hr R&Rno coding
📍 Center console area, beneath center tunnel trim
⚠️ Introduced 1990 MY; driver airbag only; requires crash data clear via PST1 after deployment
⚠️ VDO or Motometer; mileage programming required via PST for replacement; odometer fraud prevention
Anti-lock Brake System Control Unit (ABS)1.5 hr R&Rno coding
📍 Front luggage compartment, left side behind wheel well
⚠️ Bosch ABS 2 (1990-91) or ABS 5 (1992-94); standard equipment from 1990; no coding required
Climate Control Unit (A/C Control)1.5 hr R&Rno coding
📍 Center console, climate control panel
⚠️ Electronic climate control on equipped vehicles; standalone module, no coding required
Digital Motor Electronics (DME)1.2 hr R&Rrelearn only +0.3 hr▸ programming details
📍 Engine compartment, right rear corner near firewall
🔧 PST1/PST2
⚠️ Bosch Motronic 2.10 (1990-91) or 2.11 (1992-94); basic idle adaptation via PST after battery disconnect
Radio/Audio Head Unit (Radio)0.8 hr R&Rrelearn only +0.2 hr▸ programming details
📍 Center console, upper dash position
🔧 Radio code card
⚠️ Becker or Blaupunkt; anti-theft code entry required after power loss; code on card in owner's manual
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.
THE LATCH HOOK ON THE CONVERTIBLE TOP CAN CRACK, DEVELOPING INTO A BREAK OF THE LATCH HOOK, IMPAIRING ITS FUNCTION.
Consequence: AT HIGHWAY SPEEDS, THE CONVERTIBLE TOP WILL NOT BE HELDFIRMLY ONTO THE CAR BODY AND COULD OPEN UNEXPECTEDLY, CAUSING A RISK OF ANACCIDENT.
Remedy: REPLACE THE LATCH HOOK ASSEMBLY WITH A NEW ASSEMBLY.
Wiper blades
964 generation (1989-1994). Some sources indicate 20 inches for both blades. Coupe has no rear wiper.
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 1994 Porsche 911 Carrera (964) 3.6L H6 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.