Audi Q3 II (2018–today)Electronics and infotainmentDriver assistance and automatic emergency braking
Calibration errors in the driver-assistance sensors in the Audi Q3 II
A specialist reliability profile documents errors in the Q3 II's adaptive cruise control, lane-keeping warning and automatic emergency braking, which it attributes to poor sensor calibration.[1]
Why this rating?
High severity: Risk of a serious engine, turbo or gearbox failure.
Frequency occasional: The source describes the fault as possible on any car with these assistance systems, without giving a number of cases. Since these are active safety systems, we rate it as high severity, but without statistics to support a higher frequency we keep it as occasional.[1]
Symptoms
- Adaptive cruise control, the lane departure warning or automatic emergency braking may activate wrongly or fail to respond as expected.[1]
Why it happens
The source attributes these faults to poor calibration of the sensors (radar or camera) that feed these assistance systems, without identifying a physical part that is failing.[1]
If it is not repaired: A poorly calibrated assistance system may not act when it should, or may activate unnecessarily, so you should not rely on it blindly until it has been checked.[1]
Affected years and cars
How much it costs to repair
Includes: Recalibration of the driver-assistance system sensors using the official dealer's diagnostic equipment.[1]
We have not found a published quote in Spain for this recalibration.
Prices in Spain, including VAT. A workshop hour costs on average €38–66 at independent garages and €77–134 at dealerships in Spain, depending on the region and the brand. How we calculate costs
How to check for it before buying a used car
- Test the adaptive cruise control and the lane-keeping warning on the road during the test drive, checking that they react normally.[1]
Recalls, campaigns and claims
As of 27 September 2026, we have no record of recalls, campaigns or extended manufacturer warranties for this fault. Check with an official dealer using the chassis (VIN) number: they will tell you whether the car has any outstanding campaign.
What owners say
Frequently asked questions
Is this assistance sensor fault dangerous?
A poorly calibrated active safety system may not respond when needed, so you should have it checked and not depend on it completely in the meantime.[1]
How is it fixed?
With a recalibration of the sensors at an official dealer using the appropriate diagnostic equipment.[1]
Is there an official campaign for this fault?
No specific campaign is recorded; it is documented only by a specialist reliability profile.[1]
What can you do now?
We will put you in touch with a partner only if you authorise it in the form.
Other faults of the Audi Q3 II
- Critical severityFrequency: OccasionalSteeringCorrosion of the bolt that secures the steering rack (2026 campaign)Yes: since September 2026, Volkswagen, Audi and Seat have been recalling 2.8 million cars over a steering bolt that can corrode and break. It affects around 696,547 Audi Q3s built between the end of October 2017 and May 2024, which means practically the entire Q3 II production up to that date. The replacement is free at official dealers.Repair: €0
- Medium severityFrequency: OccasionalElectronics and infotainmentMMI infotainment system freezes and restartsA specialist reliability profile documents that the Q3 II's central MMI screen can freeze, restart by itself or lose functions such as navigation, Bluetooth or the rear camera. No official campaign is recorded for this issue.
- Medium severityFrequency: OccasionalBodywork and interiorWater leaks and cracks in the panoramic roofOn cars fitted with a panoramic roof, a specialist reliability profile documents water leaks and cracks, pointing to blocked drains as the usual reason the seal fails.
- Medium severityFrequency: OccasionalElectrical systemPower tailgate and reversing camera failureOn versions with an electrically opening boot, a specialist reliability profile documents that the tailgate can stop halfway through its travel and that the rear camera module can leave the screen black.
The faults of its engines are on the Audi Q3 II page.
The same problem in other cars
- Critical severityFrequency: Very frequentToyota Auris IIThe Takata driver's airbag inflator can degrade and fragment when deployedOn units built between 2006 and 2017, the propellant in the Takata inflator of the driver's airbag can degrade over time and with humidity; if the airbag deploys, the inflator can rupture and throw metal fragments at the occupants. Toyota fixes it by replacing the inflator free of charge at the official dealer.
- Critical severityFrequency: OccasionalMazda 3 IVSmart Brake Support can brake the car unintentionally while drivingOn cars built between November 2018 and October 2019, an unintended activation of the Smart Brake Support automatic braking system can stop the car unexpectedly while it is moving, with a risk of the vehicle behind running into it. Mazda inspects it free of charge at an official dealer.
- Critical severityFrequency: OccasionalMazda CX-30Smart Brake Support can brake the car unintentionally while drivingOn cars built between November 2018 and October 2019, an unintended activation of the Smart Brake Support automatic braking system can stop the car unexpectedly while it is moving, with a risk of the vehicle behind running into it. Mazda inspects it free of charge at an authorised dealer.
- Critical severityFrequency: OccasionalToyota C-HR IThe pre-collision system radar can fail without warning the driverOn vehicles built between 2020 and 2021, a faulty radar sensor installation can stop the pre-collision system (PCS) from detecting a vehicle ahead, with no warning or assisted braking and no message that the system is not working. Toyota fixes it by inspecting the radar at an official service centre.
- Critical severityFrequency: OccasionalVolkswagen ID. BuzzFaulty stops on the third-row seat railsYes, in one batch: in July 2025 Volkswagen recalled ID. Buzz models built between 13 August and 15 November 2024 because the stops on the third-row seat rails are faulty and can reduce how well those seats are held in a crash.
- High severityFrequency: OccasionalAlfa Romeo StelvioAdaptive cruise control: unintended acceleration caused by brake module softwareYes: a 2019 campaign covers Stelvios built up to June 2019 because, with adaptive cruise control switched on, the car could accelerate without the driver asking it to. According to the DVSA, it is fixed with a software update to the braking system module.
All faults with driver assistance systems (99)Cars with the most electronics and infotainment problems
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Sources
Every fact on this page links to its source. If you find an error, let us know.
- Fiabilité Audi Q3 II : pannes et témoignagesfiches-auto.fr · Reliability study · consulted 27 September 2026 · in French