This bulletin provides information when there is increased oil consumption; >0.5ltr/1000 km.
full bulletin at NHTSA ↗2015 Audi Q5 engine problems
moderate Owners of the 2015 Audi Q5 have filed 35 NHTSA complaints about the engine, typically surfacing around 75,000 miles at roughly $3,100 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See engine across all vehicles →
Failure mileage
Complaints
35
Recalls
0
Avg fix
$3,100
| Model year | engine complaints |
|---|---|
| 2011 Q5 | 28 |
| 2013 Q5 | 25 |
| 2014 Q5 | 29 |
| 2015 Q5 (this page) | 35 |
| 2016 Q5 | 27 |
| 2017 Q5 | 15 |
| 2018 Q5 | 13 |
| 2019 Q5 | 4 |
1fire
When does it fail?
Of the 35 engine complaints filed for the 2015 Audi Q5, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Of the 12 model years of Audi Q5 we track for engine problems, this one carries the most owner complaints on file — 35.
Engine accounts for 36% of every owner complaint on file for this vehicle — the dominant problem area across 6 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This bulletin provides informaiton when the engine is not running smoothly, misfiring.
full bulletin at NHTSA ↗This bulletin provides information on VIN Plates, Safety Certification labels, and the ordering procedures.
full bulletin at NHTSA ↗This bulletin provides information on the use of the Audi frequencly analysis app, and where the application can be downloaded.
full bulletin at NHTSA ↗This bulletin provides information regarding UV leak additive for finding oil leaks.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2015 Audi Q5 engine suffers from a persistent piston ring and piston defect that causes abnormal oil consumption. Owners report needing to add oil every 200–1,000 miles depending on severity, with check engine and add-oil warning lights appearing frequently. Multiple dealers initially dismissed this as normal wear, but Audi's own oil consumption tests, independent mechanics, and a third-party Audi specialist confirmed the piston ring failure is a real issue.
In severe cases, the engine can seize without warning—one owner reported metal shavings in the oil and complete engine failure at 61,000 miles. Another owner's cylinder #3 lost compression suddenly, causing rough running and starting problems. These failures create genuine safety risks, especially at highway speeds.
The cooling system shows related failures: radiators crack, water pumps fail, and in at least one case, oil has contaminated the coolant, suggesting internal seal breakdown. NHTSA Campaign 18V229000 addressed some of these cooling issues, but dealers faced prolonged parts shortages. Repair costs for engine replacement run $13,000–$20,000, and Audi has denied warranty coverage on out-of-warranty vehicles despite the defect being manufacturer-related. Some owners report spending thousands out-of-pocket on band-aid fixes like PCV valve and oil cooler replacements that don't solve the underlying problem.
Same Audi Q5 engine reports on nearby years: 2013 · 2014 · 2016 · 2017 · 2018
Failure modes owners describe
Excessive oil consumption / piston ring defect
Engine consumes oil at abnormally high rates, requiring top-ups every 200–1,000 miles depending on severity. Root cause consistently identified as defective piston rings or pistons that fail to seal the combustion chamber properly, allowing oil to enter and burn. Audi oil consumption tests show consumption rates of 0.49 quarts per test cycle or approximately 1 quart per 200–500 miles in severe cases. Multiple owners report that dealers initially dismissed the issue as normal wear, while subsequent diagnostics and independent mechanics confirmed the defect.
When: Typically manifests between 60,000–85,000 miles; one case reported at 39,999 miles and another at 101,000 miles.
Symptoms owners cite: Check engine light or add oil warning light illuminates frequently; Oil level drops rapidly, requiring frequent top-ups; Burning smell from engine; Oil accumulation on engine exterior; In advanced cases, rough idle, loss of power, knocking sound, and acceleration hesitation
Codes mentioned: Check Engine Light (generic), Add Oil Warning Light, EPC Light (in some cases)
Repairs/costs cited: Audi dealers quote $13,000–$20,000 for engine replacement, with some citing $10,000–$12,000 for piston ring replacement alone. PCV valve replacement ($500–$1,000 range, estimated) provided temporary relief in some cases but did not resolve underlying piston defect. Oil cooler replacement attempted in at least one case but failure persisted.
Recalls/TSBs owners mention: Audi USA established oil consumption test parameters that some vehicles pass despite owner reports of worsening consumption. Multiple owners report Audi initially denied coverage, citing age of vehicle or that it fell outside recall eligibility (2017 recall did not cover 2015 models, per one owner account). NHTSA Campaign 18V229000 (Engine and Engine Cooling) addresses engine cooling but not oil consumption; parts for this recall were unavailable for extended periods.
Engine seizure / catastrophic mechanical failure
Engine suffers sudden mechanical failure involving metal shavings in oil, loss of cylinder compression, or complete engine seizure. In two cases, failure occurred at relatively low mileage (61,000 and 62,000 miles) with no prior warning lights. One case involved cylinder #3 losing compression from 170 psi to 30 psi, causing rough running and starting issues. Failures occur without sustained warning, creating immediate safety hazard.
When: 61,000–85,000 miles; one case at 62,000 miles, another at 85,000 miles.
Symptoms owners cite: Loud abnormal noise from engine while driving; Vehicle becomes undrivable or stalls without warning; Rough running or fails to start on occasion; Engine light and coolant light may illuminate before failure, but sometimes do not; Metal shavings found in oil upon inspection; Loss of cylinder compression
Codes mentioned: Check Engine Light (prior to some failures), Coolant Light (in some cases)
Repairs/costs cited: Requires full engine replacement; parts may not be available. One tow was 40 miles to nearest dealer. No repair pricing provided by owners in failure scenarios; however, Audi declined warranty coverage in at least one case citing out-of-warranty status and unverified claim about oil filter compatibility.
Recalls/TSBs owners mention: Audi denied warranty assistance in at least one catastrophic case, citing vehicle out of warranty and claiming Mann oil filters (which Audi itself uses) are incompatible. No recall covers this failure mode; related to broader engine cooling/oil system defect (Campaign 18V229000) but not explicitly remedied.
Engine cooling system failures (radiator, thermostat, water pump)
Radiator, thermostat, and water pump failures occur at relatively low mileage, resulting in coolant loss, overheating, and vehicle immobility. Failures often preceded by coolant warning lights or overpressure. In multiple cases, oil has migrated into the coolant system, suggesting internal seal failure related to the piston/ring defect.
When: 58,000–140,000 miles; most reported around 58,000–75,000 miles.
Symptoms owners cite: Coolant warning light or 'Pull Over Immediately' message illuminates; Vehicle overheats; Coolant leak under vehicle; Radiator found cracked; water pump defective; Oil contamination in coolant (in at least one case); Warning chime and loss of coolant pressure
Codes mentioned: Coolant Warning Light, Check Engine Light (in some cases)
Repairs/costs cited: Radiator, thermostat, water pump, and related seals require replacement. No specific repair costs cited by owners. Oil cooler replacement attempted in one case; failure persisted.
Recalls/TSBs owners mention: NHTSA Campaign 18V229000 (Engine and Engine Cooling) addresses this issue, but parts have been unavailable for extended periods (as of 2018, some owners still waiting). Interim notices sent but no firm timeline provided. Audi advised owners not to park vehicle in garage pending repair.
Spark plug and ignition system issues
Spark plugs burn out prematurely and require repeated replacement (4 times in one year reported). One case also mentions rough idle and knocking. Likely related to combustion seal issues from piston ring defect, allowing blow-by gases to foul plugs.
When: Reported at approximately 10 years into ownership (2015 vehicle, complaint date suggests 2024–2025). Earlier case at 77,000 miles.
Symptoms owners cite: Spark plugs burn out every 2–3 months; Rough idle; Knocking sound; Check Engine Light (in some cases)
Codes mentioned: Check Engine Light (generic), Misfire codes (implied but not explicitly stated)
Repairs/costs cited: Spark plug replacement approximately $200–$500 per replacement; multiple replacements within short timeframe suggest underlying combustion issue not addressed. One case reports replacement under warranty.
Recalls/TSBs owners mention: No manufacturer response documented for this issue; dealers perform replacements without investigation of root cause.
PCV (positive crankcase ventilation) system overpressure
Excessive pressure develops in the crankcase due to PCV valve malfunction or design defect, contributing to oil consumption and blow-by. One owner replaced PCV valve twice with no lasting resolution.
When: Mileage and timing not always specified; at least one case at 77,000 miles.
Symptoms owners cite: High pressure in oil tank (reported by one owner); Excessive oil consumption; Oil accumulation on engine; Burning smell
Repairs/costs cited: PCV valve replacement costs approximately $500–$1,000 (estimated); temporary fix only. One owner replaced twice without permanent resolution.
Recalls/TSBs owners mention: No specific manufacturer response documented; dealers perform replacement as standalone repair without addressing underlying piston ring defect.
Throttle response lag and acceleration hesitation
Vehicle exhibits delayed acceleration response followed by sudden catch-up surge, creating unpredictable drivability. One narrative mentions this is a known issue across VW-Porsche-Audi diesel and turbo vehicles; no resolution offered.
When: Noted when outside air temperature is warm/hot and vehicle is warmed up.
Symptoms owners cite: Lag in acceleration when foot is on pedal; Sudden surge to catch up to foot position; Slower deceleration response; Unpredictable throttle behavior
Repairs/costs cited: No repairs attempted or recommended; dealer advised owner to adjust driving behavior. Related to turbo engine characteristic, possibly exacerbated by oil system issues.
Recalls/TSBs owners mention: Audi service advisor acknowledged issue is common across VW-Porsche-Audi vehicles and stated no current resolution exists.
Synthesized from 35 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 7 most recent
Still waiting for manufacture's recall for auxiliary water pump that was identified 7 months ago.
The contact owns a 2015 Audi Q5. The contact stated that on numerous occasions while driving at various speeds, extra pressure was needed to depress the accelerator pedal for the vehicle to accelerate as needed. The contact stated that she heard a knocking sound throughout the vehicle. The check engine warning light was illuminated. Additionally, the contact stated that she needed to add one…
Oil consumption - check engine add oil lights come on every 200 to 300 miles add a quart of oil then again after 200+ miles add another quart. Audi will not acknowledge there is a problem and recall. I have 108k miles 90% highway. 5 year 80k warranty it started after 80k miles. I have spent $3k the past six months without replacing the engine.
Engine consumed a quarter of oil every 300 miles. The EPC light and engine light illuminated. The vehicle went into limp mode. I had the vehicle towed to a certified mechanic.Vehicle was inspected by a certified mechanic and will need a new engine. Engine only has 85,000 miles and oil was changed every 5000 miles.
After paying to run an inspection test recommended by Audi USA, it was confirmed that the issue of the excess oil consumption was with the piston, and they also recommended changing the engine. It puts me at risk every time I drive the car because I am not sure how much oil my car has at this point. I have been reporting to the dealer my observation of excessive oil consumption. They kept…
The contact owns a 2015 Audi Q5. The contact stated that the vehicle was consuming an excessive amount of engine oil. The vehicle was taken to a dealer where it was discovered that oil had leaked into the engine coolant. Due to the failure, the oil cooler was replaced; however, the failure persisted. The vehicle was taken back to the dealer where an oil consumption test was performed. The test…
Tl* the contact owns a 2015 Audi q5. The contact received notification of NHTSA campaign number: 18v229000 (engine and engine cooling); however, the parts to do the repair were unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. Audi richmond (12592 broadstreet rd, richmond, va 23233, (804) 273-8700) was contacted and confirmed that…
Had engine trouble with your 2015 Audi Q5?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2015 Audi Q5?
It's a documented issue but not catastrophic. 35 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Across the 14 complaints that reported odometer mileage, most engine failures cluster between 58,000 and 111,000 miles, with the median around 75,000. A quarter of owners report trouble before 58,000; a quarter make it past 111,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2015/Audi/Q5.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.