The engine control unit (ECU) is the central computer managing engine operation — fuel injection, ignition timing, emissions control, and more — based on data from numerous sensors.
If you notice any of the following, the part likely needs replacement:
Engine won’t start or runs very poorly
Multiple, seemingly unrelated engine-related faults appearing together
Check Engine light constantly on with numerous fault codes
Installation information
Mounted in the engine bay, connecting to the extensive engine wiring harness — requires specialist programming/coding to match the specific vehicle and, often, the immobiliser system.
Frequently asked questions
The ECU needs to be correctly programmed with software matching the exact vehicle, engine variant, and often synchronised with the immobiliser system — this typically requires specialist diagnostic equipment and expertise.
Super good! They came through with the part I needed, quickly and at a fair price! Thanks, and I definitely recommend!
I
Ilmars K.
August 2026
★★★★★
I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.
A
Aleksandr L.
Toyota Avensis
August 2026
★★★★★
No complaints about Evro Trans itself, everything's fine. But the delivery..... It felt like the order was being carried by turtles. 4 days from Riga to Daugavpils. Judging by the tracking, the parcel just sat somewhere behind a shed for 3 days, then they found it and delivered it the next day. I think that's why I won't be ordering there again.
P
Paul F.
June 2026
★★★★★
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
N
Natālija I.
May 2026
★★★★★
I ordered antifreeze heaters and an auxiliary pump. Everything arrived quickly, the very next day, and matched the description. I'm satisfied.
J
Juris J.
February 2026
★★★★★
Excellent service, timely delivery, and complete transparency at every step. I highly recommend EvroTrans to anyone looking for a reliable partner!
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Egor S.
November 2025
★★★★★
Bought a front fender for my car. I liked it! After payment they sent more than 20 photos of the problem areas, and it was packed very securely - took a while to unwrap.
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