We use cookies on whatcar.com to improve your browsing experience and to provide you with relevant content and advertising, by continuing to use our site you agree to this. Please see our privacy policy for more details. Continue
The Electronic Control Unit, also known as the engine management system, is a box which monitors the operation and performance of your engine. Sophisticated braking and traction aids may also be linked so they can be coordinated with the engine.
Glossary
Want to know the difference between your APRs and your PCPs? Our Glossary will guide you through the minefield of car-buying terms.