2018 Audi A5
The Verdict
The 2018 Audi A5 has 6 owner complaints filed with NHTSA. The most reported issues are engine (3 complaints) and electrical (2 complaints). With a Klunk Score of 99/100, it earns a "Smooth Ride" rating. If you're shopping for a Audi A5, consider the 2017 model year which has 66% fewer complaints.
Safe Bet
The 2017 has 66% fewer complaints
View the 2017 Audi A5 dashboard →
Klunk Score: Smooth Ride
This vehicle year has significantly fewer complaints than average. A reliable choice.
How is this calculated?
The Klunk Score ranks this vehicle year against all others in our database based on total owner complaints filed with NHTSA. 100 = fewest complaints (top tier), 0 = most complained-about. Scores above 60 are better than average; below 40 means more problems than most.
Recalls 2
Active safety recalls from NHTSA for this vehicle year.
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2018 Audi A5 Coupe vehicles. The affected vehicles were built with head curtain air bag assemblies that may not unfold properly....
Risk
In the event of a crash necessitating deployment of the head curtain air bag, if the air bag does not deploy properly, the vehicle occupants have an increased risk of injury.
Remedy
Audi will notify owners, and dealers will modify the head curtain air bags so that they deploy properly, free of charge. The recall began on January 18, 2018. Owners may contact Audi customer ser...
Reported Apr 10, 2026
Volkswagen Group of North America (Volkswagen) is recalling certain 2018 Audi A5 Sportback vehicles. The front suspension fasteners may not have been sufficiently tightened during vehicle productio...
Risk
A loose front wheel may increasing the risk of a crash.
Remedy
Volkswagen has notified owners, and dealers will inspect the front suspension fasteners, and replace them as necessary, free of charge. The recall began January 23, 2019. Owners may contact Audi ...
Reported Apr 10, 2026
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Under the Hood
Each number is a complaint. Darker = bigger problem.
By Category
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Worst Problems
Complaints
The MMI ( main screen) system randomly reboots every 5 minutes, even when using CarPlay, which is unsafe. Please check it out. Thank you!
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
I own a 2018 Audi A5. Many critical cooling system parts — including the thermostat housing, water pump housing, radiator end tanks, breather tubes, and quick-connect hoses — are made of plastic and sit in constant exposure to coolant temperatures over 200°F. Over time, these components become brittle, crack, and fail prematurely. Recently, the plastic breather/return hose between the coolant reservoir and the radiator broke apart during routine service due to brittleness. When these parts fail, coolant leaks quickly, which can cause sudden overheating, engine damage, and potential vehicle disablement while driving. Based on owner reports and my own experience, this appears to be a widespread issue across Audi/VW vehicles of this generation. I request that NHTSA investigate whether the use of plastic in these high-heat, high-pressure components represents a design defect that creates a safety hazard.
The water pump failed on my vehicle. Initially reported 2/2025 at Authorized Audi Service Center. They claimed it was normal for coolant to dip. Audi USA Confirmed I have a settlement class vehicle in 03/2025. Mentioned an 80K Mileage limit. (Car only had 69K miles at the time) When the issue persisted I reached out for repair in accordance to Water Pump Settlement. McKenna Audi Service center initially stated the extended warranty expired 05/2025, and mentioned an 8 Year Limit (8/80K whichever comes first) 9/3 Reached out to Audi USA again and they initially provided an approval. Instructed to take to authorized service center for official diagnosis. 9/5 Audi USA recanted approval 2 days later. Instructed to Call Settlement Administrator. SA stated this is fully Audi responsibly warranty does not expire until 9/2025 unable to assist. Spoke to supervisor at Audi USA who stated extended warranty did not expire until 09/26/2025 09/08 Audi Beverly Hills confirmed water pump malfunction. Sent invoice to supervisor at Audi USA. $2338.25 Supervisor informed me later that warranty is expired after all. Stated a regional manager would look at it but no guarantees. At this point I have spent $350 for a diagnosis I did not need to satisfy the demands of the Audi warranty that is now being denied.
The vehicle has 36000 miles on it and the oil cooler has failed. The car is meticulously maintained. This failure compromises the ability for the engine to cool properly. Because of the failure, coolant is then forced into the engine oil potentially destroying the engine. Engine replacements are 10,000 for these types of cars. Audi is aware of this issue and should repair all vehicles with this known issue
Engine shuts off occasionally whilst cornering at very low speed. No warning. Been happening for several years.