What to Do When BYD Surui Cannot Detect the Key?

2 Answers
McBriella
07/25/25 3:21pm
If the BYD Surui cannot detect the key, you can use the mechanical key to open the car door, press the clutch, place the key near the start button, and wait for the button indicator to turn green before starting the vehicle. Common reasons why the BYD Surui cannot detect the key include: 1. Insufficient key battery: For example, the battery in the key has not been replaced for a long time; 2. Key malfunction: The key's control unit is damaged; 3. Signal interference near the parking spot: You can first use the mechanical key to drive the car to another location and try again. If it works, it indicates that the remote key failure is caused by severe signal interference; 4. Vehicle issues: It could be a problem with the fuse box or the vehicle's central control system. The BYD Surui is a compact sedan with body dimensions of 4680mm in length, 1765mm in width, and 1490mm in height.
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OMadeline
08/11/25 9:25pm
I recently encountered the issue of undetectable key with my BYD Surui as well, which is really annoying and common. A depleted key battery is the most likely culprit, typically using a CR2032 coin cell that can be bought at any supermarket—try replacing it yourself. Just remember to carefully open the key casing without damaging the circuitry. If the battery replacement doesn’t help, check the key’s position: place it near the steering wheel’s lower area or the door handle’s induction zone, as deep placement in a bag can weaken the signal. For temporary vehicle system glitches, try restarting the car or disconnecting the battery’s negative terminal for a few minutes before reconnecting to reset the anti-theft module. Prevention is key—I recommend replacing the battery every six months and cleaning the key contacts, while avoiding prolonged stays in signal-interference zones. If none of these methods work, promptly contact a 4S店 to inspect the induction module—don’t compromise safe driving, especially on highways where it’s too risky.
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