Alfa Romeo 159 / Fiat Bravo 1.9 JTDM Diesel Engine Control Unit Box (ECU) – Bosch 51821929 is a critical electronic module responsible for managing engine functions in specific diesel models. This unit processes sensor inputs and controls fuel injection, ignition timing, and other parameters to ensure efficient engine operation.
This ECU is designed for Alfa Romeo 159 and Fiat Bravo 1.9 JTDM diesel vehicles. When replacing, it is essential to compare the Bosch part number 51821929 on your old unit to confirm compatibility. As an electronic control unit, it interfaces with vehicle wiring and sensors, so checking connector types and pin layouts for a match is advisable.
The ECU controls key engine-related systems but note that coding, calibration, and fault repair are not guaranteed by this listing. Buyers seeking an exact replacement should verify their vehicle model and engine type correspond with this partโs application. If in doubt, consulting a technical expert or submitting a request for parts can help ensure proper fitment.
- For Alfa Romeo 159 and Fiat Bravo 1.9 JTDM diesel engines
- Bosch part number 51821929 for reference
- Ensure matching plug layout and vehicle engine model before purchase
Need help matching this item to your vehicle? Use more ECU & Lock Set, Vehicle Parts Finder or Request a Part with your VIN, engine number, part number or clear photos.

