VW Polo 5 1.2 TDI Engine Control Unit Box (ECU) – Delphi 03P906021AB / 03P906021AA is a critical electronic module designed to manage the engine functions of the VW Polo 5 1.2 TDI model. This unit controls key aspects such as fuel injection, air intake, and ignition timing to ensure the engine runs efficiently and responds smoothly to driver inputs.
The ECU processes data from various engine sensors and adjusts engine operations accordingly. When replacing this unit, it is important to compare the part numbers 03P906021AB or 03P906021AA on your current ECU to confirm compatibility. This component fits within the category of Engine Control Units and Lock Sets for VW Polo 5 vehicles.
Coding, calibration, and fault diagnosis related to this control unit are not covered by this listing, so professional intervention may be needed to ensure proper integration and functionality within the vehicle’s electronic system. Buyers should verify the existing ECU reference numbers and consider expert advice if uncertain.
- Part category: ECU & Lock Set
- Compatible with VW Polo 5 1.2 TDI engines
- Delphi-manufactured unit with part codes 03P906021AB / 03P906021AA
This unit is aimed at users seeking a replacement for their vehicleโs engine control module. If unsure about fitment, contacting the sales desk or submitting a request for part assistance is recommended.
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.

