📍 Mounted on or near distributor, engine compartment
⚠️ Fixed-function solid-state ignition trigger only; not a programmable control unit. Found on later models in this range with Bosch or Motorola electronic ignition systems.
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 1978 Volvo 240 2.1L B21F SOHC I4 (Bosch K-Jetronic fuel injection) 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.