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What is the BMW code 27a4?
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4 answers
★ Top Answer
The BMW 27A4 error code may result in a failure to start the car and points to an issue with the EWS module. The EWS module in a BMW plays a crucial role in managing the communication between the starter, starter relay ignition, key, and fuel systems. When the EWS detects a chipped key in the ignition, it sends signals to initiate the engine starting process in conjunction with the DME, or Digital Motor Electronics, which controls various aspects of the engine's operation from emissions to fuel efficiency and power distribution. The presence of the 27A4 code could signify a significant problem with either the EWS module itself or a breakdown in communication between the DME and the EWS. To address this issue, many BMW owners may need to reprogram their keys or repair the internal components of the key fob in order to resolve the error code.
More answers
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Code 27A4 on a BMW indicates an issue with the EWS system.
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Carly explains that 27A4 could mean three things: 1. The transponder in the key is faulty; 2. The key programming is wrong; or 3. There is an issue with the immobilizer control unit or antenna.
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Is there a single resolution for this problem?
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