2018 Audi A5 Electrical system Problems
- Complaints
- 4about this part
- Share
- 11%of 38 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the electrical system of the 2018 Audi A5, 11% of the 38 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I turned on my car and several malfunctions came on the dash,and would not start and went in limp mode. A local mechanic stated it's the electrical component of the coolant pump causing malfunction. He also stated that could lead the car catching fire if overheats since the 5V is dipping below due to the faulty coolant /water pump. Ultimately forcing the car in limp mode for safety precautions. The problem is I purchase my car at 87,000 miles from the Audi dealership, and the extended warranty that covers the car is 80,000 miles”
NHTSA complaint #11717440, filed 2026-02“I am writing to formally bring to your attention a potential violation of federal vehicle safety reporting requirements by Audi regarding an Electronic Control Unit (ECU)/Comfort Control Module failure in my 2018 Audi A5. As the original owner of this vehicle, I experienced a critical ECU failure approximately 2yrs after purchase (Sept 2017), which I believe qualifies as a major safety defect under 49 CFR 573.6-577.7. According to federal regulations, manufacturers are required to report such safety defects to the NHTSA within five (5) days of discovery. …”
NHTSA complaint #11641542, filed 2025-02“Start stop system failure Warning displayed Check engine light Car hesitates IF the start stop happens to decide to function At times it won’t work at all”
NHTSA complaint #11606963, filed 2024-08Related service bulletins
- 11038061Sep 2, 2026This bulletin provides information regarding fault finding and repair information for electric tailgate.
- 11036974Aug 7, 2026This bulletin provides informaiton when the airbag warning lamp is active, event memory "B200000 - Faulty control module, symptom 305".
- 11035810Jul 9, 2026This bulletin provides informatoinw hent here are scratches or a coating on the cover of the instrument cluster, or particles inside of the housing.
- 11034643Jun 23, 2026This bulletin provides information when there are noises from the area around the instrument cluster.
- 11034634Jun 23, 2026This bulletin provides informationwhen noises/vibration are detected from front of vehicle in dynamic mode.
- 11033492May 22, 2026This bulletin provides informaiotn when the starter battery is discharged or defective.
- 11032165Apr 30, 2026This bulletin provides informaiotn when the starter battery is discharged or defective.
- 11031053Mar 26, 2026This bulletin provides informaiton regarding the Universal Traffic Recorder.
- 11031051Mar 20, 2026This bulletin provides informaiotn about various infortainment system complaints.
- 11030985Mar 17, 2026This bulletin provides information when the parking assistance gives false warnings.
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 2 | 25% |
| 2024 | 5 | 63% |
| 2021 | 2 | 25% |
| 2020 | 41 | 68% |
| 2019 | 2 | 17% |
| 2018 | 4 | 11% |
| 2016 | 1 | 14% |
| 2014 | 7 | 25% |
| 2013 | 9 | 26% |
| 2012 | 2 | 9% |
| 2010 | 1 | 3% |
| 2009 | 2 | 18% |
| 2008 | 2 | 40% |
Other parts of the 2018 Audi A5
8 complaintsOther or unknown
8 complaintsBrakes
4 complaintsBody and structure
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsAir bags
3 complaintsTransmission and drivetrain
3 complaintsSteering
2 complaintsSuspension
2 complaintsEngine cooling
1 complaintsExterior lighting
1 complaintsForward collision avoidance
1 complaints
← All problems reported for the 2018 Audi A5
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology