Audi Q3 Hybrid ABS Failure Linked to Sensor Glitch

Having some experience with hybrid vehicles, I faced nearly identical issues with my 2021 Audi Q4 e-tron. The symptoms you describe match exactly what I encountered, particularly the vehicle stability concerns and persistent ABS warning. The diagnostic scan in my case revealed problems with the electronic stability control unit. The complete fix involved replacing the affected control unit, which coordinates the ABS, traction control, and yaw rate sensors. The repair cost me 1000 Euro, including programming and calibration. My repair timeline was about 2 days total, one day for diagnosis and parts ordering, another for installation and testing. The workshop needed specialized diagnostic equipment to properly reset and calibrate all systems after installation. Before suggesting more specific solutions, could you share: Current mileage on your Q3, When did these symptoms first appear, Are there any other warning lights active, Have you noticed these issues more during specific weather conditions, Did the problems start suddenly or develop gradually This information would help determine if your case mirrors mine and whether you might be looking at a similar repair path.

Thanks for the insights. My mileage is at 126319 KM. The lateral sensor issues started suddenly last week after my routine service. The wheel alignment feels off and the yaw rate readings are inconsistent according to my diagnostic scan. The problem seems worse during wet conditions. No other warning lights besides ABS and traction control. Based on your experience, it sounds like I should prepare for a significant repair. Would like to hear if others had similar repair costs for the electronic control unit replacement.

Yes, the symptoms you describe align even more closely with my Q4 experience now that you've provided those details. The sudden onset after service is particularly telling, we could be looking at the same electronic stability control issue I faced. The inconsistent yaw rate readings combined with lateral sensor faults typically indicate a failing control unit, rather than just a single sensor problem. The wet weather sensitivity matches my experience too, the system becomes more erratic when traction is already compromised. While my repair was 1000 Euro, your mileage is significantly higher than mine was when the issue occurred. The good news is the fix itself should be similar, replacement of the electronic control unit that manages both the ABS and stability systems. A heads up based on my repair: make sure the workshop performs a complete diagnostic scan of all related systems after installation. My initial repair needed a follow-up visit because the yaw rate calibration wasnt properly completed, causing intermittent ABS warnings to return. Since the issue appeared after service, it might be worth having the shop check if any work they did could have affected the lateral sensor or its connections. Sometimes these problems can be triggered by disturbed wiring or connections during routine maintenance.

The symptoms you describe match mine exactly, definitely sounds like an electronic stability control issue connected to the lateral sensor problems. My vehicle had 126319 KM when issues started after routine service, with unstable yaw rate readings showing on my diagnostic scan. The wheel alignment feels notably off, especially in wet conditions. Your repair costs and timeline seem in line with what I might expect. The 1000 Euro price point for the control unit replacement makes sense given the complexity of these hybrid systems. Appreciate the heads-up about ensuring proper calibration after installation, will definitely mention this to my workshop to avoid repeat visits. Since my problems started right after service, I will have them check if any maintenance work could have affected the sensor connections. The fact that the issues worsen in wet conditions confirms this is likely a comprehensive electronic stability system problem rather than just an isolated sensor failure. Would still welcome other Q3 owners input on their repair experiences and costs, but your detailed breakdown gives me a solid starting point for what to expect at the workshop.