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Audi · Known Issues

2015 Audi A5 Problems: 5 Known Issues

2015 model year · 3,400+ owner reports · Updated September 2026

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Issue summary

According to Au7o's analysis of 3,400+ owner reports, the 2015 Audi A5 has 5 documented known issues, with 3 rated critical. The most serious are EA888 Timing Chain Tensioner Failure ($1,500-$3,500 repair), S-Tronic/DSG Mechatronic Unit Failure ($1,500-$5,000 repair) and Timing Chain Tensioner Failure (2.0 TFSI Engine) ($2,000-$10,000 repair). The most commonly reported issue is EA888 Timing Chain Tensioner Failure with 1,800 owner reports. Across all issues with published estimates, repair costs range from $150 to $10,000. DIY maintenance guides at au7o.io.

In This Article

  • A5 Engine4
  • A5 Transmission1
  • Recalls8
  • FAQ
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In This Article

  • Engine4
  • Transmission1
  • Recalls8
  • FAQ

All 5 Known Issues

Filter:
ALL YEARS20242023202220212020201920182017201620152014201320122011201020092008

When Issues Typically Appear

S-Tronic/DSG Mechatronic Unit Failure
32K-48K
Timing Chain Tensioner Failure (2.0 TFSI Engine)
60K-120K
Severe Carbon Buildup on Intake Valves (Direct Injection)
60K-100K
EA888 Timing Chain Tensioner Failure
80K-100K
038K75K113K150K mi
Community reported
1,800 owners

On the 2008-2017 Audi A5 2.0T, the A5 shares the B8/B8.5 platform with the A4 and inherits the same EA888 2.0T timing chain tensioner weakness. The original tensioner design allows the chain to slacken on cold starts, eventually jumping teeth and causing catastrophic valve-to-piston contact. Pre-2013 engines are most affected.

This issue also affects: Audi A4, Audi A1, Audi A6

Common Symptoms

  • Rattling noise on cold start that fades when warm
  • Check engine light with timing correlation codes
  • Engine misfires at idle
  • Rough idle after sitting overnight
  • Loss of power under acceleration
  • Metallic chain slap noise from front of engine

How to Fix

Replace timing chain, tensioner (use latest revision 06K109467K), and all guides as a complete kit. Preventive replacement recommended at 80,000-100,000 miles before symptoms appear. If chain has already jumped, engine teardown is required to assess valve and piston damage.

Typical repair cost:$1,500 - $3,500

Research This Issue

Based on 1,800 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High Confidence1,800 owner reportsLast reported by owners Jun 2023Reviewed Mar 2026

On the 2008-2016 Audi A5 2.0 TFSI, the B8/B8.5 A5 with the 2.0 TFSI engine (2008-2016) suffers from premature timing chain tensioner failure, identical to the A4 and A6. The tensioners wear out between 60,000-120,000 miles, causing the timing chain to stretch and rattle. A loud rattling noise on cold start from the front of the engine is the classic warning sign. If ignored, the timing chain can jump timing or break, causing catastrophic valve-to-piston contact and destroying the engine. Early B8 models (2008-2012) are more prone to failure than later B8.5 models (2013-2016). A5OC forum members report many failures under 100,000 miles, with some owners experiencing complete engine destruction. The repair requires removing the front of the engine and costs $2,000-$5,000. Some owners report oil consumption issues leading to accelerated tensioner wear.

This issue also affects: Audi A4, Audi A1, Audi A3

Common Symptoms

  • Loud rattling or clattering noise from front of engine on cold start
  • Metallic rattling that disappears after 10-30 seconds of warm-up
  • Check engine light with timing correlation codes (P0016, P0017, P0087)
  • Rough idle or misfires
  • Engine won't start (if chain has jumped)
  • Catastrophic engine damage if chain breaks (bent valves, destroyed pistons)

How to Fix

PREVENTIVE REPLACEMENT: Replace timing chain, tensioners, and guides at 80,000-100,000 miles BEFORE rattling starts ($2,000-$3,000). If rattling has already begun, DO NOT delay—chain can jump at any moment. Repair requires removing front engine cover, water pump, and thermostat. Labor is 8-12 hours. Use ONLY OEM Audi parts—aftermarket tensioners fail quickly. Change oil every 5,000 miles and check oil level weekly to prevent accelerated wear. If catastrophic failure occurs, engine replacement ($6,000-$10,000) may be more cost-effective than rebuild.

Typical repair cost:$2,000 - $10,000

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence

On the 2008-2015 Audi A5, the 2.0 TFSI engine in early B8 A5 models (2008-2015) suffers from excessive oil consumption due to defective piston ring design. Owners report burning 1 quart of oil every 500-1,200 miles, requiring constant top-ups. The issue is worst in 2010-2012 models with EA888 Gen 2 engines. Faulty oil control rings fail to scrape oil from cylinder walls, allowing it to burn in the combustion chamber. This causes blue smoke on startup, fouled spark plugs, and carbon buildup. Low oil levels starve the turbocharger and timing chain tensioners, leading to expensive failures. Audi extended warranty coverage for some models and performed piston ring replacements under warranty. A5OC forums report many owners going through 5+ quarts between oil changes. Some cases cause cylinder scoring requiring engine replacement.

This issue also affects: Audi Q3, Audi S8, Audi SQ2

Common Symptoms

  • Low oil warning light frequently (need to add oil between changes)
  • Burning 1+ quarts of oil every 1,000 miles
  • Blue or gray smoke from exhaust on startup or hard acceleration
  • Fouled spark plugs (oil-soaked)
  • Check engine light with misfire codes (P0300-P0304)
  • Rough idle from carbon buildup
  • Turbo whining (from oil starvation)

How to Fix

For SEVERE consumption (over 1 qt/1,000 mi): Piston ring replacement or short block replacement ($4,000-$7,000). Check Audi's extended warranty program for 2009-2015 models—some repairs covered. For MODERATE consumption: Replace PCV valve ($150), clean carbon deposits with walnut blasting ($800), and switch to thicker oil (5W-40 instead of 5W-30). PREVENTION: Check oil level WEEKLY, change oil every 5,000 miles (NOT 10,000), and avoid 2010-2012 models when buying used. 2015+ Gen 3 EA888 engines have updated rings and are far more reliable.

Typical repair cost:$150 - $7,000

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence

On the 2008-2023 Audi A5, all direct-injection engines in the A5 and S5 (2.0 TFSI, 3.0T, and 3.2L V6) suffer from severe carbon buildup on intake valves. In direct-injection engines, fuel sprays directly into the cylinder, bypassing the intake valves. This means intake valves are only exposed to oil vapors from the PCV system, which bake onto the valve backs as hard carbon deposits. Over 60,000-100,000 miles, carbon restricts airflow, causing rough idle, misfires, hesitation, and power loss. The 3.0T supercharged S5 is particularly susceptible due to higher oil vapor pressure. In severe cases, carbon deposits prevent valves from seating properly, causing compression loss and valve damage. The ONLY effective fix is walnut blasting—blasting crushed walnut shells through the intake to remove carbon. A5OC forums recommend this as preventive maintenance every 60,000 miles.

This issue also affects: Audi S8, Audi A4, Audi A1

Common Symptoms

  • Rough or unstable idle (engine shakes at stoplights)
  • Hesitation or stumbling on acceleration
  • Reduced power and sluggish throttle response
  • Poor fuel economy (2-4 MPG drop)
  • Check engine light with misfire codes (P0300-P0306)
  • Engine runs rough when cold, smooths out when warm
  • Hard starting or extended cranking

How to Fix

WALNUT BLASTING: Remove intake manifold and blast crushed walnut shells through intake ports to remove carbon ($700-$1,200). Requires specialized equipment—DIY not recommended unless experienced. Dealers charge $1,200-$1,800; independent Audi shops charge less. Repeat every 60,000-80,000 miles as preventive maintenance. PREVENTION: Install catch can ($300-$500) to filter PCV oil vapors before they reach intake valves—extends cleaning interval to 100k+ miles. Add Liqui Moly Intake Valve Cleaner to every oil change ($15). Perform "Italian tune-up" monthly (spirited highway driving to high RPM).

Typical repair cost:$700 - $1,800

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence
Community reported
1,600 owners

On the 2008-2017 Audi A5, the 7-speed S-Tronic (DL501) dual-clutch transmission in the A5 suffers from mechatronic unit failures. The mechatronic unit is the electro-hydraulic control module that manages gear selection and clutch engagement. Internal solenoid and valve body wear causes erratic shifting, shuddering, and eventual loss of gears.

This issue also affects: Audi A4, Audi A3, Audi Q3

Common Symptoms

  • Harsh or jerky shifts between 1st and 2nd gear
  • Shuddering during low-speed maneuvers
  • Transmission warning light on dash
  • Delayed engagement when shifting from P to D
  • Clunking noise when coming to a stop
  • Transmission stuck in neutral or limp mode
  • Gear selection flashing on instrument cluster

How to Fix

Replace or rebuild the mechatronic unit. Audi dealers replace the entire unit ($3,000-$5,000), but specialized transmission shops can rebuild the existing unit for $1,500-$2,500. Regular fluid changes every 40,000 miles with correct Pentosin FFL-2 fluid can extend mechatronic life significantly.

Typical repair cost:$1,500 - $5,000

Research This Issue

Based on 1,600 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High Confidence1,600 owner reportsLast reported by owners Aug 2023Reviewed Mar 2026
NHTSA Recalls8 recalls

BACK OVER PREVENTION: SENSING SYSTEM: CAMERA

Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Audi A8 and S8, 2022 Audi A5 Sportback, A4 Sedan, E-Tron GT, Q3, Q5, RS6 Avant, A3 Sedan, S5 Sportback, Q5 Sportback, Q7, Q8, RSQ8, SQ7, SQ8, and S3 Sedan vehicles. A software error may prevent the rear-view image from initially displaying when the vehicle begins to reverse. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."

Campaign #21V82500020/10/2021

EQUIPMENT:ELECTRICAL:INFOTAINMENT:VIDEO (TOUCH)SCREEN/MONITOR/UNIT

Volkswagen Group of America, Inc. (Audi) is recalling certain 2021-2022 AUDI A8, A6 Allroad, E-TRON Quattro, 2022 S3, RSQ8, RS7, RS6 Avant, Q8, Q7, Q3, E-TRON Sportback Quattro, S5 Cabriolet, E-TRON GT, S5 Sportback, A7, A6, A5 Sportback, A5 Cabriolet, A4, A4 Allroad, A3, S8, SQ7, SQ8, S6, and S4 vehicles. The infotainment main unit may become damaged internally when the vehicle is shut off, resulting in an inoperative rearview camera display the next time the vehicle is started. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."

Campaign #22V80600026/10/2022
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Frequently Asked Questions

What are the most common Audi A5 problems?

According to Au7o's analysis of 3,400+ owner reports, the 2015 Audi A5 has 5 documented issues. The most frequently reported are: EA888 Timing Chain Tensioner Failure, S-Tronic/DSG Mechatronic Unit Failure, Timing Chain Tensioner Failure (2.0 TFSI Engine). Of these, 3 are rated critical and should be addressed promptly.

Is the Audi A5 reliable?

The 2015 Audi A5 has 5 known issues documented across 3,400+ owner reports. 3 issues are rated critical: EA888 Timing Chain Tensioner Failure and S-Tronic/DSG Mechatronic Unit Failure and Timing Chain Tensioner Failure (2.0 TFSI Engine). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Audi A5 problems?

Repair costs for known Audi A5 issues range from $150 to $10,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, EA888 Timing Chain Tensioner Failure, typically costs $1,500-$3,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2008-2017 Audi A5 EA888 Timing Chain Tensioner Failure?

The A5 shares the B8/B8.5 platform with the A4 and inherits the same EA888 2.0T timing chain tensioner weakness. The original tensioner design allows the chain to slacken on cold starts, eventually jumping teeth and causing catastrophic valve-to-piston contact. Pre-2013 engines a… Repairs typically run $1,500-$3,500. Severity: high.

What is the 2008-2017 Audi A5 S-Tronic/DSG Mechatronic Unit Failure?

The 7-speed S-Tronic (DL501) dual-clutch transmission in the A5 suffers from mechatronic unit failures. The mechatronic unit is the electro-hydraulic control module that manages gear selection and clutch engagement. Internal solenoid and valve body wear causes erratic shifting, s… Repairs typically run $1,500-$5,000. Severity: high.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data sourced from 3,400+ owner reports, NHTSA recalls, TSBs, and automotive forums.

TIRES

Volkswagen Group of America, Inc. (Audi) is recalling certain 2019-2021 Audi A5 Sportback, RS5 Coupe, RS5 Sportback, S5 Sportback, 2020-2021 A4 Allroad, A4 Sedan, A5 Cabriolet, A5 Coupe, A6 Allroad, A6 Sedan, A7, A8, Q5, S4 Sedan, S5 Coupe, S5 Cabriolet, S6 Sedan, S7, S8, SQ5, 2021 Q5 Sportback, Q7, Q8, RS6 Avant, RS7, RSQ8, SQ5 Sportback, SQ7, and SQ8 vehicles. The rear axle alignment may not have been inspected after the repairs for Recall 21V-295 (42L1) were performed.

Campaign #22V03400026/01/2022

SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY

Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Q7, Q8, Q5 Sportback, SQ5 Sportback, RS6 Avant, RS7, RS Q8, 2020-2021 Audi S6 sedan, Q5, A8, S8, A7, A6 Allroad, A5 Cabriolet, A4 sedan, A4 Allroad, SQ5, S7, A6 sedan, S5 coupe, S4 sedan, S5 Cabriolet, A5 coupe, 2019-2021 RS5 coupe, A5 Sportback, S5 Sportback, RS5 Sportback vehicles. The lock nut on the trailing arm of the rear axle may break due to stress corrosion.

Campaign #21V29500026/04/2021

SEATS

Volkswagen Group of America, Inc. (Audi) is recalling certain 2017-2020 A4 Allroad, A4 Sedan, 2018-2019 RS5 Coupe, 2019 RS5 Sportback, 2018-2020 A5 Cabriolet, A5 Coupe, A5 Sportback, S4 Sedan, S5 Cabriolet, S5 Coupe, and Audi S5 Sportback vehicles. The cable connecting the seat heater to the Passenger Occupant Detection System (PODS) may have a contact fault, causing the software to misdiagnose a malfunction and disable the passenger air bag.

Campaign #21V87400010/11/2021

+ 3 more recalls. Check all on NHTSA.gov

Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.

What is the 2008-2016 Audi A5 Timing Chain Tensioner Failure (2.0 TFSI Engine)?

The B8/B8.5 A5 with the 2.0 TFSI engine (2008-2016) suffers from premature timing chain tensioner failure, identical to the A4 and A6. The tensioners wear out between 60,000-120,000 miles, causing the timing chain to stretch and rattle. A loud rattling noise on cold start from th… Repairs typically run $2,000-$10,000. Severity: high.

What is the 2008-2015 Audi A5 Excessive Oil Consumption (2.0 TFSI Engine)?

The 2.0 TFSI engine in early B8 A5 models (2008-2015) suffers from excessive oil consumption due to defective piston ring design. Owners report burning 1 quart of oil every 500-1,200 miles, requiring constant top-ups. The issue is worst in 2010-2012 models with EA888 Gen 2 engine… Repairs typically run $150-$7,000. Severity: medium.

What is the 2008-2023 Audi A5 Severe Carbon Buildup on Intake Valves (Direct Injection)?

All direct-injection engines in the A5 and S5 (2.0 TFSI, 3.0T, and 3.2L V6) suffer from severe carbon buildup on intake valves. In direct-injection engines, fuel sprays directly into the cylinder, bypassing the intake valves. This means intake valves are only exposed to oil vapor… Repairs typically run $700-$1,800. Severity: medium.