2015 Audi Q5: sudden loss of power

Filed Dec 17, 2025 · Electrical, Engine · IL

1.What component or system failed or malfunctioned, and is it available for inspection upon request? EPC light is on, car stalled on highway towed in Audi Dealership Jan/2023, On August 18, 2025 The vehicle experience catastrophic engine failure, electrical issues, coolant system defects,and currently inoperable and safety risk. 2.How was your safety or safety of others put at risk? vehicle stalled on street potentially public safety risk. 3.Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, Audi dealership service center recommendation buy $22,000 for brand new engine . 4.Has the vehicle or component been inspected by manufacturer, police, insurance representatives or others? Inspected by Audi Dealership Service Center, and State Farm claims representative. 5.Were there any warning lamps, message or other systems of the problem prior to the failure, and when they first appear? When did first appeared a problem EPC light goes off and on January 17, 2023, loss of engine power, oil/coolant leaks, and etc.

Filed Jun 26, 2025 · Engine, Fuel system · NJ

Vehicle: 2015 Audi Q5 2.0T VIN: [XXX] At around 70,000 miles, my vehicle began consuming engine oil abnormally. I received a low-oil warning and had to add 1 quart every 1,000 miles. I first approached an authorized Audi dealer at 75,000 miles, who inspected the vehicle and stated this was “normal for older vehicles” and found no issues. However, the problem worsened rapidly. By 79,000 miles, I visited a second Audi dealer who acknowledged that this was a common problem in this engine type. They quoted me $16,000–$20,000 for a full engine replacement, stating they could not replace pistons alone. At 80,000 miles, my car now consumes 1 quart of oil every 200 miles. The oil warning light comes on frequently. I am forced to carry oil and top off multiple times per week. This is not normal wear for a luxury vehicle with regular maintenance. This condition creates multiple safety risks: •Sudden engine seizure or power loss if oil runs too low, especially while driving at highway speeds. •Loss of steering/brake assist due to oil pressure failure. •Increased fire risk from leaks or overheating. •Frequent roadside stops to add oil, risking exposure to traffic. •Distraction while driving due to monitoring oil levels. •Environmental hazard from oil spills. The engine remains available for inspection. The vehicle has only been inspected by Audi dealerships. Audi should be held accountable for a defect that compromises safety and reliability at relatively low mileage. I urge the federal safety agency to investigate and take appropriate action. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Apr 10, 2024 · Engine · PA

Cylinder #3 lost compression, down to 30 psi from 170 psi, causing the car to lose power and run extremely rough or not run on occasion. This is a safety hazard, especially risky for highway driving. There were no warning messages, car just start running very rough or wouldn't start. Such loss of compression has been reported by an Audi service manager who says Cylinder #3 is known to have this issue, but there is no recall for it yet. The problems began in May 2021. The car was drinking/consuming oil frequently and occasionally running rough. It was taken to multiple mechanics to identify the issue. Fixes included changing spark plugs, coils, and the PCV valve to provide temporary solutions at best. 5/24/21 increased consumption of oil began 9/9/22 rough idle, spark plugs replaced 10/14/22 rough idle and burning oil, taken to a service shop, replaced the PCV valve 7/12/23 rough idle again, spark plugs replaced again under warranty 2/14/24 - rough shake again, spark plugs replaced again and dead cylinder #3 confirmed

Filed Jan 16, 2024 · Steering · CO

We have never had an issue with the vehicle until we recently faced very cold Temps (-10 to -20). Was driving the vehicle, with no issues, and stopped to get gas. Upon restarting the vehicle it displayed a power steering error with a do not drive. The steerling lost all power steering function and was extremely hard to turn. We let the vehicle sit and restarted it 3-4 times and on the fourth try, the error went away and there was no further issues with the power steering on this (first) occasion. This has now happened intermittently since the first occurrence (even with very cold Temps) but with no regularity. Not sure if this is a malfunction or if there is something in need of replacement. It is extremely concerning.

Filed Sep 17, 2023 · Engine, Fuel system · SC

Faulty pistons, piston rings and piston heads responsible for excessive oil consumption. Excessive oil consumption occurs because the combustion chamber is not properly sealed off from the Audi turbo engine parts that need to remain lubricated. Because of inadequate lubrication, fragments of the piston rings flow through the Audi 2L turbo engines and damage important components. As a result, our 2015 Audi Q5is at risk for immediate loss of engine power. There is currently a class action law suit against Audi for this problem for cars in this year range, but nothing has been solved.Audi's answer to this problem is to bring the car in every 300-500 miles for free oil top offs. This does NOT solve the underlying problem nor eliminate the deadly risk of total engine failure. People are driving around in vehicles at risk for complete failure. The Audi dealership states that to replace piston rings, it will cost between $10,000 and $12,000. Absolutely unsafe and unacceptable.

Filed Aug 31, 2023 · MA

My 2015 Q5 is experiencing excessive oil consumption and has failed the oil consumption test. This is a known defect in older cars for which there was a successful class action suit and now it seems that this defect is also present in certain Audi cars between 2010-2017. The excessive oil consumption stems from a piston and ring defect. The defect is causing the cars' pistons and piston heads to break off into pieces. This causing a number of problems requiring costly repairs and makes the car unsafe to drive. In addition to excessive oil consumption, the car can experience a sudden loss of power while driving (which is a safety issue) and engine knocking. My mechanic has inspected the car, run the oil consumption test (which the car failed) and told me that the piston and rings need to be replaced. He also stated that he has seen this in Audi's and that it is a known problem. Currently, my low oil light is coming on every 800 miles (normal would be 5000+miles). You are welcome to inspect my car at any time.

Filed Jan 12, 2023 · Steering · 126,000 miles · IL

The contact owns a 2015 Audi Q5. The contact stated while driving at an undisclosed speed in cold weather, the vehicle experienced a loss of power steering assist. The vehicle was towed to the dealer, where it was diagnosed that the power steering rack needed to be replaced. The vehicle was not repaired and remained at the dealer. The manufacturer was made aware of the failure and informed the contact that there was no recall associated with the VIN and that the warranty had expired. The failure mileage was approximately 126,000.