2018 Audi A4 Engine Problems
- Complaints
- 5about this part
- Share
- 11%of 45 total for the year
- Median mileage
- 14,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the engine of the 2018 Audi A4, 11% of the 45 complaints for this model year. Where a mileage was given, the median is 14,000 miles.
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.
“Engine malfunction prevented the vehicle to engage and a significant lag. Correction of the failure has been attempted twice and a third attempt to correct malfunction is currently in progress with no movement as of yet. Gas tank has been drained and refilled and did not correct issue. Definitely not a gasoline type issue.”
NHTSA complaint #11349755, filed 2020-08, 14,000 miles“Water Pump prematurely failed. Upon self inspection, I noticed the coolant reservoir was below the minimum requirements. I asked the dealer to inspect, and they determined the cause was a faulty water pump. At around 50,000 miles, this water pump should not have failed under normal use. I am fortunate I self inspected, as continued use may cause premature engine failure due to overheating. Overheating would cause spontaneous vehicle operation failure during normal driving conditions, stalling the vehicle on a road or highway, putting myself and others at risk for impact.”
NHTSA complaint #11489365, filed 2022-10“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 2026-07“The vehicle displayed a low coolant warning and the coolant reservoir was low. Audi dealer service records dated on or about 02/14/2025 document the concern as: “client states low coolant warning was on, coolant reservoir is low, diagnose and advise.” The dealer performed coolant-related work involving the thermostat gasket / coolant hoses or connections to the coolant reservoir, ran the vehicle to operating temperature, and rechecked. The concern is being reported because the coolant loss/refill issue continued or remained unresolved afterward. …”
NHTSA complaint #11747808, filed 2026-07Related service bulletins
- 11034657Jun 26, 2026This bulletin provides information when there is increased oil consumption; >0.5ltr/1000 km.
- 11034728Jun 10, 2026This bulletin provides informaiton when the engine is not running smoothly, misfiring.
- 11034656Jun 4, 2026This bulletin provides information when DTC U140A00 Terminal 30 is stored in the ECM.
- 11029368Feb 20, 2026This bulletin provides information on the use of the Audi frequencly analysis app, and where the application can be downloaded.
- 11029367Feb 20, 2026This bulletin provides information on VIN Plates, Safety Certification labels, and the ordering procedures.
- 11028398Jan 14, 2026This bulletin provides information regarding UV leak additive for finding oil leaks.
- 11027356Dec 11, 2025This bulletin provides information when there is increased oil consumption; >0.5ltr/1000 km.
- 11026206Nov 25, 2025This special notice is to inform dealers to return the parts listed and only order the successor parts going forward.
- 11018973May 28, 2025This bulletin provides information when DTC U14A00 Terminal 30 is stored in the ECM.
- 11016532Mar 12, 2025This bulletin provides informatin when the engine does not run smoothly at idling speeds.
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2023 | 3 | 30% |
| 2022 | 2 | 33% |
| 2021 | 1 | 9% |
| 2019 | 2 | 20% |
| 2018 | 5 | 11% |
| 2017 | 22 | 39% |
| 2016 | 7 | 64% |
| 2015 | 10 | 53% |
| 2014 | 13 | 41% |
| 2013 | 6 | 25% |
| 2012 | 13 | 68% |
| 2011 | 7 | 64% |
| 2010 | 37 | 58% |
| 2009 | 44 | 37% |
| 2008 | 13 | 7% |
| 2007 | 17 | 9% |
| 2006 | 15 | 5% |
| 2005 | 10 | 5% |
| 2004 | 7 | 4% |
| 2003 | 7 | 3% |
| 2002 | 5 | 3% |
| 2001 | 2 | 2% |
| 1998 | 2 | 1% |
Other parts of the 2018 Audi A4
18 complaintsElectrical system
17 complaintsFuel system
6 complaintsBody and structure
6 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