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matteokoenig82

Mini Roadster ABS Fault Lateral Acceleration Sensor

I am experiencing an issue with my 2015 Mini Roadster diesel. The ABS lamp illuminates, indicating a failure of the ABS system. Diagnostic scanning reveals an error related to the lateral acceleration sensor. Based on my research, a defective electronic control unit affecting the sensor is a likely cause. I would like to know if anyone has encountered similar issues and what the typical troubleshooting steps involve before considering replacement, which could cost around 1000€.

Summary of the thread

The 2015 Mini Roadster diesel experienced an ABS fault, with diagnostics pointing to a lateral acceleration sensor error. A defective electronic control unit was suspected as a likely cause. After consulting a workshop, the faulty sensor and control unit were confirmed and replaced, including recalibration of the vehicle's stability systems. Post-repair, the ABS and traction control systems functioned correctly, resolving the issue.

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4 comment(s)

gerhardheld5

Have you checked the wheel alignment? An issue there could cause aberrant readings from the lateral sensor. Also, are there any other fault codes present, particularly related to the ABS module or any of the wheel speed sensors?

matteokoenig82 (community.author)

Thank you for your reply. Regarding the wheel alignment, I have not checked it specifically, but I have not noticed any pulling or unusual tire wear. As for other fault codes, the only code present relates directly to the lateral acceleration sensor. Could a faulty ABS module cause such a sensor error even if it doesn't report its own separate error?

gerhardheld5

Given the absence of other fault codes and the presence of a lateral sensor specific code, it is highly probable that the sensor itself or the associated control unit is the source of the problem. A defective ABS module could theoretically influence sensor readings, but if the diagnostic points to the lateral sensor, replacement of that component or its control unit is a reasonable course of action. I would suggest having a workshop confirm the diagnosis prior to replacement.

matteokoenig82 (community.author)

I appreciate the confirmation. I took the Mini Roadster to a certified workshop, and the lateral acceleration sensor was indeed diagnosed as faulty. The electronic control unit required replacement, which included recalibration of the vehicle stability systems. The wheel alignment was checked post-repair. The ABS and traction control systems are now functioning correctly, as indicated by the error memory being clear and the ABS lamp being off.

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MINI

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ROADSTER