2018 Audi A4 Other or unknown Problems
- Complaints
- 18about this part
- Share
- 40%of 45 total for the year
- Median mileage
- —not reported
- Trend
- RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA recorded 18 complaints about the other or unknown of the 2018 Audi A4, 40% of the 45 complaints for this model year.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Due to the AT&T 3G turndown, Audi of America is removing a critical safety feature from certain MY 2018 vehicles, with no solution offered to the vehicle owner except to pay an additional $650-$1000 out of pocket to install a retrofit device to restore some of these safety features. As sold, MY2017-2018 and certain MY 2019 Audi A4/A5/Q5/Q7 vehicles came with an emergency call feature, both automatic in the event of a severe accident, and manual. …”
NHTSA complaint #11453407, filed 2022-02“My car's MMI keeps restarting while driving which affects the rear view camera and while backing up it can restart and go completely blank. I feel this puts my safety at risk while backing up. It also shuts down my bluetooth to my phone which can be a hazard while driving. I have called the dealership but they will not do anything without a large diagnosis fee which i cannot afford. They have said there are no recalls against it. No warnings prior to the failure and the failure happens every time I drive it, including multiple times per use.”
NHTSA complaint #11684505, filed 2025-09“A vehicle diagnostic scan dated 04/15/2026 showed electrical communication faults involving vehicle control modules. The scan showed U014100, described as “Lost Communication With Body Control Module ‘A’,” with status listed as passive/sporadic. The scan also showed U112100, described as “Data bus message missing,” with status listed as active/static. …”
NHTSA complaint #11747863, filed 2026-07“The vehicle has a recurring interior rattle / loose-trim concern involving interior panels, trim, speaker/subwoofer area, rear shelf, dashboard area, or related mounting components. The noise is not merely a comfort concern if it is caused by a loose component, fastener, grille, panel, or speaker housing that may move, worsen, detach, or distract the driver. …”
NHTSA complaint #11747854, filed 2026-07“The engine oil level has been gradually dropping and has required monitoring and/or adding oil between normal service intervals. The exact source is unknown. It may involve abnormal oil consumption, an external oil leak, internal engine oil consumption, PCV/oil separator issue, turbo-related oil consumption, gasket/seal issue, or oil loss that is not leaving an obvious visible puddle. …”
NHTSA complaint #11747848, filed 2026-07Related service bulletins
- 11038130Sep 25, 2026This bulletin states that technicians are required to report to the manufacturer when a vehicle has flooded, and specify the height to which the vehicle has been flooded.
- 11038027Sep 25, 2026This bulletin provides information for reporting safety related information to the manufacturer.
- 11038025Sep 15, 2026This bulletin provides information when the license plate mounting bracket threded inserts are stripped.
- 11038026Sep 8, 2026This bulletin provides infomraiton abou the Audi frequency analysis application, which is available in the App Store for Android and Apple phones.
- 11036917Aug 26, 2026This bulletin provides information when the horn sound quality is poor.
- 11036934Aug 11, 2026This bulletin provides information when there is a paint issue on alloy wheels.
- 11035854Jul 27, 2026This bulletin provides a statement regarding the bottleneck of supply for VW approved oil types VW 504.00 and VW 507.00.
- 11034642Jun 4, 2026This Reporting Obligation requires technicains to contact the Technical Assistance Center (TAC) in cases where the airbag/seatbelt is deployed/not deployed; general accident…
- 11033457May 26, 2026This is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: A software fix is needed to correct the…
- 11032131Apr 30, 2026This bulletin provides diagnostic information for the vehicle locking system.
Other or unknown: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2023 | 1 | 10% |
| 2022 | 3 | 50% |
| 2021 | 3 | 27% |
| 2020 | 60 | 47% |
| 2019 | 3 | 30% |
| 2018 | 18 | 40% |
| 2017 | 10 | 18% |
| 2016 | 1 | 9% |
| 2015 | 2 | 11% |
| 2014 | 2 | 6% |
| 2013 | 3 | 13% |
| 2010 | 1 | 2% |
| 2009 | 7 | 6% |
| 2008 | 2 | 1% |
| 2007 | 8 | 4% |
| 2006 | 7 | 2% |
| 2005 | 3 | 1% |
| 2004 | 6 | 3% |
| 2003 | 2 | 1% |
| 2002 | 4 | 2% |
| 2001 | 4 | 3% |
| 2000 | 2 | 2% |
| 1999 | 2 | 1% |
| 1998 | 2 | 1% |
| 1997 | 2 | 2% |
| 1996 | 6 | 7% |
Other parts of the 2018 Audi A4
17 complaintsFuel system
6 complaintsBody and structure
6 complaintsEngine
5 complaintsTransmission and drivetrain
5 complaintsAir bags
4 complaintsBrakes
4 complaintsForward collision avoidance
4 complaintsBack-over prevention (rear camera)
2 complaintsSuspension
2 complaintsElectronic stability control
1 complaintsEngine cooling
1 complaints
← All problems reported for the 2018 Audi A4
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