Free used car buyer guide / B8 / B8.5 facelift / 2008-2015
Audi A4 common problems and best years
By BYBA Research - how we score cars
Updated 2026-06-12
BYBA Buy Score
5.8/10
3 walk-away risks, 4 serious faults, 1 minor fault documented for this generation, weighted by severity and repair cost. Biggest factor: ea888 gen 2 oil consumption from piston/ring wear. Score methodology.
The B8 Audi A4 is a good used car only when the engine choice is controlled. The headline risk is early EA888 2.0 TFSI oil consumption and timing-chain/tensioner wear; diesels add DPF/EGR/AdBlue/SCR risk by market. The safer buys are 2013-2015 B8.5 cars with revised petrol history or documented 2.0 TDI motorway use, smooth S tronic/Multitronic behaviour, dry coolant system and clean recalls.
Faults covered
8
Highest risk
EA888 Gen 2 oil
Best years
2013-2015
Best buys
- 2013-2015 B8.5 2.0 TFSI with oil-consumption/tensioner history documented.
- 2.0 TDI motorway car with DPF/EGR data clean.
- Manual or quattro S tronic with service proof.
Inspect hard
- 2009-2012 2.0 TFSI for oil consumption, chain tensioner and PCV.
- Front-wheel-drive Multitronic for slipping/shudder.
- Panoramic/sunroof and wet carpets for module risk.
Avoid
- High oil use, chain rattle, Multitronic flare, wet interior, emissions delete or active airbag recall.
Next checks
Before you contact the seller
Check the car's history first. Then bring the right tools if it still looks worth viewing.
Primary next step
Check history, title, and recall status
The faults above matter more if the car also has accident history, finance flags, missing service records, or open safety recalls.
Viewing kit
Bring the right tools
Four cheap tools catch most of the faults on this page at a Audi A4 viewing.
Printable workflow
Take the inspection pack
The PDF is the ordered checklist for the viewing: documents, walk-around, test drive, and scan.
Open PDF optionSome links here are partner links. If you buy through one, BYBA earns a commission. The price you pay does not change. How we make money.
Engines and trims
Which Audi A4 should you buy?
On most used cars, the engine and trim choice changes the risk more than the mileage does. Narrow this down before you start viewing cars.
EA888 Gen 2 1.8/2.0 TFSI
2008-2015
BUY ONLY WITH PROOF
Oil consumption and timing-chain/tensioner history decide whether the car is cheap or dangerous.
EA113/3.2 FSI/V6 petrol markets
early B8 by market
SPECIALIST INSPECT
Less common; carbon, chain and fuel-system checks matter.
2.0 TDI EA189/EA288 transition
2008-2015
GOOD IF MOTORWAY USED
Efficient and durable, but DPF/EGR and dieselgate-era software/history must be understood.
3.0 TDI
2008-2015
GOOD BUT COSTLY
Strong drivetrain; chain, intake, DPF and S tronic costs are higher.
Year notes
Year-by-year buyer advice
Use this to narrow the search before you spend time travelling to view a car.
2008
B8 launch with new MLB platform.
Buyer: Launch cars need hard oil/chain/electronics inspection.
Owner: Keep oil consumption records.
2009
2.0 TFSI supply grows.
Buyer: Treat petrol oil consumption as the main risk.
Owner: Do not normalize top-ups.
2010
More quattro/S tronic mix.
Buyer: Gearbox service and chain tensioner proof matter.
Owner: Service transmission on time.
2011
Mature pre-facelift.
Buyer: Avoid vague engine-repair stories.
Owner: Fix PCV/coolant leaks early.
2012
B8.5 facelift begins by market.
Buyer: Verify facelift and engine revision, not just registration date.
Owner: Keep recall/software paperwork.
2013
Facelift supply normal.
Buyer: Better year if oil/chain history is clean.
Owner: Preserve tensioner/oil records.
2014
Late B8.5.
Buyer: Strong buy if serviced and dry.
Owner: Suspension/brake refresh helps resale.
2015
Final B8.5 before B9.
Buyer: Pay late-car money only with excellent documents.
Owner: Close recalls before sale.
Common problems
Faults to check before buying
What fails, what it looks like, what it costs, and the quick checks you can do at the viewing - ranked by how badly each one can hurt you.
Fault 1
EA888 Gen 2 oil consumption from piston/ring wear
Affects
Mainly 2009-2012 2.0 TFSI, some 1.8/2.0 by market.
Symptoms
Frequent oil top-ups, blue smoke, fouled plugs, low oil warning.
Typical repair cost
EUR 300-900 diagnosis/PCV; EUR 3,000-7,000+ piston repair.
Codes / scan clues
Misfire/catalyst faults may follow; oil use often no code.
Root cause: Piston ring design/deposit issues allow excessive oil use.
Quick check
- Ask litres per 1,000 km and top-up receipts.
- Check tailpipe/plugs and cold start smoke.
- Reject "they all use oil" without repair proof.
Fault 2
EA888 timing-chain tensioner/chain failure
Affects
2009-2013 2.0 TFSI before revised tensioner is proven.
Symptoms
Cold rattle, cam/crank faults, no-start, rough running.
Typical repair cost
EUR 900-2,000 preventative; EUR 4,000-8,000+ engine damage.
Codes / scan clues
P0016, P0017, cam/crank correlation.
Root cause: Early chain tensioner can lose tension and allow chain jump.
Quick check
- Cold start for rattle.
- Verify revised tensioner/chain invoice.
- Scan for cam/crank correlation faults.
Fault 3
PCV, rear main seal and vacuum leaks
Affects
2.0 TFSI.
Symptoms
Rough idle, oil cap suction, whistle, oil leaks, lean faults.
Typical repair cost
EUR 150-500 PCV; EUR 800-1,800 rear main seal.
Codes / scan clues
P0171, idle/mixture faults.
Root cause: Failed crankcase ventilation raises pressure/vacuum and can stress seals.
Quick check
- Idle oil-cap suction test.
- Listen for whistle.
- Inspect bellhousing for oil.
Fault 4
Multitronic CVT shudder or slipping
Affects
Front-wheel-drive automatic A4 in many markets.
Symptoms
Flare, judder, delayed engagement, gearbox warning.
Typical repair cost
EUR 600-1,200 service/diagnosis; EUR 2,500-6,000 repair.
Codes / scan clues
TCM ratio/pressure faults.
Root cause: CVT clutch/chain/control wear and fluid neglect.
Quick check
- Gentle take-off and hill start.
- Warm restart D/R engagement.
- Scan transmission module.
Fault 5
S tronic mechatronic/clutch wear
Affects
quattro S tronic B8/B8.5.
Symptoms
Low-speed judder, harsh shifts, delayed R/D, warnings.
Typical repair cost
EUR 400-900 service; EUR 1,500-4,000 mechatronic/clutch.
Codes / scan clues
P17xx pressure/adaptation faults.
Root cause: Fluid wear, mechatronic faults and clutch adaptation limits.
Quick check
- Cold D/R and traffic crawl.
- Scan gearbox.
- Verify fluid service.
Fault 6
TDI DPF/EGR/AdBlue and dieselgate-software aftermath
Affects
2.0/3.0 TDI by market.
Symptoms
DPF light, EGR faults, NOx/SCR faults, poor economy after update.
Typical repair cost
EUR 500-1,500 sensors/EGR; EUR 1,500-4,000 DPF/SCR.
Codes / scan clues
P2002, P0401, NOx/SCR faults.
Root cause: Soot loading, EGR deposits and emissions-system ageing.
Quick check
- Scan soot/ash and regen history.
- Check dieselgate/update paperwork.
- Avoid deletes.
Fault 7
Front multi-link suspension arm wear
Affects
All B8, worse with S line wheels.
Symptoms
Knock, shimmy, inner tyre wear, vague steering.
Typical repair cost
EUR 400-1,500 front refresh.
Codes / scan clues
None.
Root cause: Ageing bushings and ball joints in multi-link front suspension.
Quick check
- Brake from speed for shimmy.
- Inspect tyre inner edges.
- Listen over sharp bumps.
Fault 8
Sunroof/plenum water ingress and electrical faults
Affects
B8 with sunroof or blocked drains.
Symptoms
Damp carpets, musty smell, MMI faults, battery drain.
Typical repair cost
EUR 150-700 drain service; EUR 1,500-5,000+ modules.
Codes / scan clues
Comfort/infotainment low-voltage and communication faults.
Root cause: Blocked drains route water into cabin/module areas.
Quick check
- Smell cabin and lift mats.
- Test MMI, windows and locks.
- Scan all modules.
Inspection pack
Printable checklist for the viewing
The free page helps you decide whether the car is worth seeing. The paid guide is the ordered, printable checklist you use at the car.
- VIN recall check for Audi A4 2008-2015.
- Service invoices matching the engine/drivetrain and mileage, not only stamped history.
- Inspect tyres, leaks, accident repair and water entry before the test drive.
- Look specifically for evidence related to EA888 Gen 2 oil consumption from piston/ring wear.
- Check every warning light, infotainment function, climate mode, camera/sensor warning and battery condition before moving.
- Cold start, full warm-up, low-speed manoeuvres and motorway-speed pull for Audi A4.
- Recheck for smells, warning lights, harsh shifts, vibration or coolant/oil leaks after the drive.
- Scan engine, transmission, ABS/body and driver-assist modules where fitted.
- Treat cleared codes or incomplete readiness monitors as negotiation or walk-away evidence.
Bottom line
Buy: 2013-2015 B8.5 2.0 TFSI with oil-consumption/tensioner history documented. 2.0 TDI motorway car with DPF/EGR data clean.
Avoid: High oil use, chain rattle, Multitronic flare, wet interior, emissions delete or active airbag recall.
Quick answers
Audi A4 buyer questions
The short versions of what this page answers in full.
What are the most common Audi A4 2008-2015 problems?
The highest-impact documented faults are: EA888 Gen 2 oil consumption from piston/ring wear; EA888 timing-chain tensioner/chain failure; PCV, rear main seal and vacuum leaks. This guide covers 8 faults in total, each with symptoms, typical repair costs, and checks you can do at a viewing.
Which Audi A4 years are the best to buy?
2013-2015 stand out in this generation. 2013-2015 B8.5 2.0 TFSI with oil-consumption/tensioner history documented. 2.0 TDI motorway car with DPF/EGR data clean.
Which Audi A4 should I avoid?
High oil use, chain rattle, Multitronic flare, wet interior, emissions delete or active airbag recall.
Is the Audi A4 2008-2015 a reliable used buy?
BYBA scores it 5.8/10 (cautious buy). 3 walk-away risks, 4 serious faults, 1 minor fault documented for this generation, weighted by severity and repair cost. Biggest factor: ea888 gen 2 oil consumption from piston/ring wear.
Get updates when this guide changes
Recalls get added, repair costs shift, and new fault patterns show up in the data. Leave an email and we'll tell you when the Audi A4 guide gets a meaningful revision. Nothing else, no selling your address.
Research basis
- static.nhtsa.gov: MC-10123153-9999.pdf
- carcomplaints.com: excessive_oil_consumption.shtml
- audiworld.com: a4-b8-platform-discussion-128
- timingchainlitigation.com
- nhtsa.gov: vehicle
- wiki.ross-tech.com: 000369
- fcpeuro.com: blog
- wiki.ross-tech.com: Category:Transmissions
- epa.gov: vw
- wiki.ross-tech.com: Diesel_Particle_Filter_Emergency_Regeneration
- whatcar.com: reliability
- ownersmanual.audiusa.com