In this video, Specialized ECU Repair provides the top four reasons that BMW Engine Control Units (ECUs) experience faulty symptoms.
The first is water damage. Most engine computers in BMWs sit directly beneath the hood of the car, which means rain falling in the wrong place can slip past and damage the computer. Similar damage can happen when rain seals wear over time, exposing the circuit board to water and causing a short-out.
Manufacturer defects are another common cause. BMW must make hundreds of thousands of engine computers for their line of vehicles, and that amount of quantity in the production process can sometimes lead to incorrect components or other critical parts being included in assembly. Over time, this continuous use can cause an ECU to break, malfunction, or even catch fire in some cases.
In many cases, an ECU's microprocessor will gradually go bad over time. Unfortunately, this part of the engine computer is not commonly available in stores. This means in most cases, you will have to replace the ECU in your BMW entirely.
Finally, BMW's have a special security protocol tied to their immobilizer, known as the EWS/CAS security system. This is a complex setup that requires clear electronic communication between the ECU, the security hub, and the keys to the vehicle itself. If any of these components are failing to communicate with each other, the car will not start properly because it is trying to avoid what it perceives to be a theft in progress.
If you need help with your BMW engine control unit, or wish to send your ECU set for testing, please contact us below or kindly fill out this repair form: [ Ссылка ]
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Specialized ECU Repair
(954) 652-1496
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