Description
Overview
Original Bosch MEV17.4 engine control unit (ECU) matched to PSA 1.4 VTi petrol engines. This used unit removed from a donor vehicle is offered as a practical replacement when the original ECU is defective or when replacing an engine harness. It controls injection, ignition, throttle and camshaft timing to ensure smooth running, reliable cold starts and low emissions on the 1.4 VTi powerplant.
Compatibility And Applications
Commonly fitted to selected Citroën and Peugeot models with the 1.4 VTi engine, for example Citroën C4 II and Peugeot 308 (T7) 1.4 VTi (around 70 kW). Compatibility must always be confirmed by comparing the full Bosch and PSA part numbers printed on your original ECU.
Function And Typical Faults
The MEV17.4 ECU precisely manages fuel injection, ignition timing, throttle control and variable camshaft timing. Typical symptoms of ECU failure include irregular idle, misfires or ignition dropouts, CAN communication errors, and sensor power-circuit faults. Common causes of ECU faults include water ingress, connector corrosion, voltage spikes or internal electronic component failure.
Removal, Replacement And Programming
Location: ECU is usually mounted in the engine compartment (often near the battery or BSM). Replacement steps (overview): disconnect the battery, release the ECU mounting brackets, unplug the multi-pin connectors and fit the replacement unit in reverse order. Important: PSA ECUs are paired with the vehicle immobilizer system (BSI and transponder key). After physical installation the unit must be cloned from the original ECU or properly programmed/coded with diagnostic equipment so VIN and immobilizer authorization match; otherwise the engine will not start.
Recommendations
For the highest chance of trouble-free installation, match both the Bosch hardware number and the PSA part code and, where possible, confirm the software index. If unsure, compare photos of the label on your existing ECU with the numbers listed below or contact the seller with images for confirmation.
Technical Information
- Manufacturer: Bosch
- Model: MEV17.4 (Engine ECU for PSA 1.4 VTi)
- Product Codes: Bosch 0 261 201 863 (0261201863); PSA 96 662 358 80 (9666235880); PSA 96 631 937 80 (9663193780)
- Additional Numbers: 1942WA, 1942WC, 1943KX, 1943KY, 1943YF, 1943YG
Notes For Mechanics And DIY Enthusiasts
This is a used unit removed from a donor vehicle. Always verify all part numbers and software indices against the label on your original ECU before purchase. Plan for immobilizer cloning or professional programming as part of the replacement procedure to restore full vehicle functionality.
