📍 Behind instrument panel, integrated into cluster assembly
⚠️ Optional electronic cluster. No programming required on replacement.
Single Board Engine Controller (SBEC)0.8 hr R&Rno coding
📍 Left side of engine compartment, mounted on inner fender near battery or on firewall
⚠️ Continued from 1984-87. DRB-II scan tool introduced 1988 for diagnostics and viewing data, but module replacement still plug-and-play with no programming. PROM chip replacement for calibration changes.
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 1989 Plymouth Horizon 2.2L I4 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.