Fitment notes: Battery located in engine compartment on right side; European H6 equivalent may also fit
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Every control module on the 1987-1989 Porsche 928S4 — 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.
Instrument Cluster (Kombi)2.0 hr R&Rno coding
📍 Dashboard behind instrument panel
⚠️ Analog cluster with electronic speedometer; odometer is mechanical and non-programmable
Climate Control Unit (A/C Control)1.8 hr R&Rno coding
📍 Center console behind climate control panel
⚠️ Electronic climate control with vacuum-operated flaps; no programming required
Anti-lock Brake System Control Unit (ABS)1.5 hr R&Rrelearn only +0.3 hr▸ programming details
📍 Right front wheel well area, mounted on inner fender
🔧 PST1/PST2 or drive cycle
⚠️ Bosch ABS 2S system; wheel speed sensor adaptation typically self-learns after replacement
Digital Motor Electronics (DME)1.2 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Left side of engine bay, mounted on inner fender near firewall
🔧 Porsche System Tester PST1/PST2
⚠️ Bosch Motronic 2.10 system; EPROM replacement may be required instead of full module coding for some updates
Radio Head Unit (Radio)0.8 hr R&Rno coding
📍 Center console in radio slot
⚠️ Blaupunkt or Becker unit; may require radio code entry after battery disconnect
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 1987 Porsche 928S4 5.0L V8 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.