The B8 A4 established itself as one of the best-selling premium sedans in Europe. The 1.8 TFSI is the entry-level turbo petrol, offering a good balance between performance and fuel economy. Early models (2008-2011) share notorious EA888 Gen 1/2 weaknesses including excessive oil consumption and fragile timing chain tensioners, while the revised Gen 3 CJEB engine is significantly more dependable. The 120 hp CDHA remained on sale until 2015, so the engine code decides which one you are looking at, not the model year.· more· less
Good fuel economy for the classWidely available, cheap parts
Oil consumption on Gen 1/2 enginesMultitronic CVT unreliable
Buy if: You can find a car with the CJEB engine, manual gearbox, and complete service history showing regular oil changes.
Avoid if: You are looking at a Gen 1/2 car (CABA, CABB, CDHA, or CDHB) with unknown oil consumption history, or a Multitronic CVT automatic.
Price & maintenance
Used price
€6,500
median asking price, typically 165,000 km
Typical range€4,800 – €8,900
Kilometres drivenAll
Maintenance cost
€800 – €1,500/year
at 15,000 km/year
Fixed costsservice, tyres, brakes€500 – €850 /yr
Risk bufferunplanned repairs€300 – €650 /yr
Price estimates are based on German asking prices. Prices and costs vary by vehicle condition and location.
Ownership costs
Maintenance assumes 15,000 km a year. Price estimates are based on German asking prices. Prices and costs vary by vehicle condition and location.
Used price
€6,500
Typically €4,800 – €8,900, at around 165,000 km.
Kilometres driven
Maintenance
€800 – €1,500per year
€500 – €850
service, tyres, brakes
€300 – €650
repair buffer
Price & maintenance
Used price
€9,000
median asking price, typically 165,000 km
Typical range€6,500 – €11,000
Kilometres drivenAll
Maintenance cost
€800 – €1,500/year
at 15,000 km/year
Fixed costsservice, tyres, brakes€500 – €850 /yr
Risk bufferunplanned repairs€300 – €650 /yr
Price estimates are based on French asking prices. Prices and costs vary by vehicle condition and location.
Ownership costs
Maintenance assumes 15,000 km a year. Price estimates are based on French asking prices. Prices and costs vary by vehicle condition and location.
Thin piston rings fail to seal properly, burning up to 1-2 litres per 1,000 km · more· less
The most notorious issue on EA888 Gen 1 and Gen 2 engines (engine codes CABA, CABB, CDHA, CDHB). The oil scraper rings have inadequate drainage holes that clog with carbon deposits, preventing oil from returning to the sump. Symptoms progress gradually: starting with 0.5 litres per 1,000 km and potentially reaching 1.5-2 litres per 1,000 km by 80,000-100,000 km. Audi acknowledged the defect and many cars were repaired under warranty or goodwill. The fix requires engine removal to replace pistons, piston rings, and connecting rods. Independent specialists charge around 3,000 euros while Audi dealers quote 5,000-6,000 euros. Cars with the Gen 3 CJEB engine have redesigned pistons and do not suffer from this issue. The year alone does not settle it: the 120 hp CDHA stayed in the range until 2015, so read the engine code off the car. Always check oil level on test drive and ask about consumption history.
Timing chain tensioner failure
up to €2,5002 of 7
Tensioner loses hydraulic pressure overnight, causing chain rattle on cold start · more· less
Affects primarily 2008-2013 models with Gen 1 and Gen 2 EA888 engines. The tensioner's check valve weakens over time, allowing oil pressure to bleed off when the engine is stopped. On the next cold start, the chain runs slack for a few seconds, producing a distinctive rattling sound. If left unchecked, the chain can skip teeth or snap entirely, causing catastrophic valve-to-piston contact in this interference engine. Audi revised the tensioner design multiple times. A full timing chain kit replacement (chain, tensioner, guides, sprockets) costs 1,200-1,500 euros at an independent garage and up to 2,500 euros at a dealer. Gen 3 CJEB engines (from 2012) have an improved tensioner but should still be monitored. Listen carefully for rattle during the first 30 seconds after a cold start.
Multitronic CVT failure (if equipped)
up to €5,0003 of 7
CVT transmission jerks, slips, or fails completely, typically after 150,000 km · more· less
The Multitronic (0AW) CVT gearbox fitted to front-wheel-drive B8 A4s is known for reliability issues, particularly on pre-2011 models. Around 18% of owners report transmission problems according to reliability surveys. Common failures include friction plate wear, mechatronic unit faults, and chain slip. Symptoms include jerky acceleration, hesitation from standstill, and shuddering at low speeds. Regular CVT fluid changes every 60,000 km help extend life, but many owners neglect this because Audi originally marketed it as a lifetime-filled unit. Full transmission rebuild costs 2,500-3,500 euros at a specialist; replacement with a remanufactured unit runs 4,000-5,000 euros. Manual gearbox models avoid this issue entirely, and the Multitronic was never fitted to quattro cars, so those are unaffected as well.
PCV valve / crankcase breather failure
up to €5004 of 7
Diaphragm tears causing vacuum leak, whistling noise, and rough idle · more· less
The PCV (positive crankcase ventilation) valve diaphragm is one of the most common failure points on EA888 engines. The rubber diaphragm tears from heat cycling, creating a vacuum leak. Symptoms include a loud whistling noise from the engine bay, rough idle, lean-running codes, and increased oil consumption. Diagnosis is straightforward: remove the oil filler cap while running and feel for vacuum. The part itself costs around 50-80 euros and replacement is relatively accessible on top of the engine. Total repair cost including labor is 200-500 euros depending on the workshop. This tends to occur between 60,000-120,000 km.
Water pump and thermostat housing leak
up to €1,2005 of 7
Plastic pump and thermostat housing cracks or its regulator sticks, typically at 70,000-120,000 km · more· less
The EA888's main coolant pump is driven mechanically by a toothed belt and sits in a plastic housing together with the thermostat and its regulating module; the separate electric pump only handles after-run and recirculation duty. The plastic housing is the usual failure point, cracking from thermal cycling and leaking coolant, and the regulating module can stick, leading to overheating. Warning signs include low coolant level, sweet smell from the engine bay, poor cabin heating, or temperature gauge fluctuations. It is recommended to replace both the pump and thermostat housing together. Parts cost approximately 250-400 euros, with labor around 250-400 euros at an independent shop due to the pump's awkward location. At an Audi dealer, total cost can reach 1,000-1,200 euros.
Carbon buildup on intake valves
up to €8006 of 7
Direct injection causes carbon deposits on valves, reducing power and causing rough idle · more· less
All direct-injection EA888 engines (Gen 1 and Gen 2) are prone to carbon buildup on the intake valves because fuel is injected directly into the cylinder rather than washing over the valves. This leads to a gradual loss of power, rough idle, misfires, and increased fuel consumption. Typically becomes noticeable after 80,000-120,000 km, especially on cars driven mostly on short trips. The standard fix is walnut blasting, which costs 400-800 euros at a specialist. Gen 3 CJEB engines add supplemental port injection which significantly reduces this problem. Regular Italian tune-ups (sustained high-RPM driving) can slow but not prevent buildup on Gen 1/2 engines.
High-pressure fuel pump (HPFP) failure
up to €1,5007 of 7
Cam-follower-driven pump wears, causing loss of power and starting difficulties · more· less
The mechanical high-pressure fuel pump driven by the camshaft can fail, particularly the cam follower and internal solenoid. Symptoms include rough running, misfires, poor acceleration at higher RPMs, and diagnostic codes indicating low fuel rail pressure. This issue is less common on the 1.8 TFSI than on the earlier FSI engines, but still occurs. The cam follower should be inspected during regular service intervals as a preventive measure. A new HPFP costs 300-500 euros, with labor adding another 200-400 euros. At an Audi dealer, the total can reach 1,200-1,500 euros. Typically occurs after 80,000 km.
Model year matters significantly for reliability
The Audi A4 B8 1.8 TFSI spans two very different reliability profiles. Pre-2012 models with EA888 Gen 1/2 engines (codes CABB, CDHA, CDHB) suffer from serious oil consumption and timing chain tensioner issues that can lead to expensive repairs. Cars with the Gen 3 CJEB engine resolved most of these problems and are considerably more dependable, but the 120 hp CDHA was still sold until 2015, so verify the engine code rather than assuming a post-2012 car has the Gen 3. Regardless of year, avoid the Multitronic CVT if possible and prioritize cars with complete service history and documented oil change intervals.
Service history
Complete Audi dealer or independent specialist records essential. Verify oil changes every 15,000 km or annually.
Tires
Check tread depth, age (date codes), and uneven wear patterns indicating alignment or suspension issues.
Cold start
Engine must be started completely cold. Listen for unusual noises in the first 30 seconds.
Test drive
Minimum 20 minutes including highway speeds and varied driving conditions.
Specific for this vehicle
Listen for timing chain rattle on cold start
Start engine completely cold and listen for metallic rattling in the first 5-30 seconds. Any rattle indicates tensioner wear requiring immediate attention.
Check oil level before and after test drive
Oil level should be between min and max on the dipstick. Ask seller about oil consumption between services. More than 0.5 litre per 1,000 km is concerning.
Identify the engine code
Check the sticker on the timing cover or service book. CJEB (Gen 3) is preferable. CABA/CABB/CDHA/CDHB (Gen 1/2) are higher risk for oil consumption, and the 120 hp CDHA was still fitted up to 2015.
+ 3 more checksShow less
Test the CVT gearbox thoroughly (if automatic)
Drive for at least 15 minutes. Feel for jerky shifts, hesitation from standstill, or shuddering at low speeds. Check service records for CVT fluid changes.
Listen for whistling from engine bay
A whistling noise at idle suggests a torn PCV valve diaphragm. Remove the oil filler cap while running and feel for excessive vacuum.
Check coolant level and condition
Low coolant or brown/milky appearance indicates water pump or gasket issues. Look for coolant residue around the thermostat housing area.
Recalls and Technical Service Bulletins
Takata airbag inflator (applicability decided by VIN, not by model year)Verify completed
Airbag control unit software, European recall (Nov 2011 - Oct 2014 production)Verify completed
Contact an Audi dealer with the VIN to verify all recalls have been completed. Audi decides Takata applicability by VIN rather than by model year, so an individual car has to be checked.
Warranty Status
Factory warranty (2 years)Expired on all B8 models
Oil consumption goodwill programNo longer available (ended around 2017)
Rust perforation warranty (12 years)May still apply on 2014-2015 cars
All Audi A4 B8 models are well outside their original 2-year factory warranty. Audi previously offered goodwill repairs for excessive oil consumption on early EA888 engines, but this program has ended. Third-party extended warranties are available but check exclusions for pre-existing oil consumption.
Sources: Research draws on model-specific owner forums and owner communities, recall information from official authorities, German automotive press, and multiple workshop cost references cross-checked against each other.
This report is for informational purposes only and does not constitute professional advice. Estimates may be inaccurate. Always have a qualified specialist inspect the vehicle before purchase. We accept no liability for decisions made based on this information.
