Audi A4 (2008–2015)

What's good

  • Euro NCAP 5 Star adult protection, 4 Star child protection, 2 Star pedestrian protection.

What to watch out for

Multitronic models built before third week of March 2008 may not have the correct chips fitted to the transmission, cooling and charging system, so that the ECU cannot accept recoding when a towbar is retro-fitted (meaning that trailer stability control, etc cannot be engaged and potentially breaking warranty if used to tow). Audi UK is aware of this problem (but does not appear to have told its dealers) and offered one reader £1,500 towards the £3,000 cost of replacements (took three days to fit) as long as the towbar was fitted by an Audi dealer. The reader's dealer met a proportion of the remainder as the car was sold to him as suitable for towing. Can be a serious problem if having towbar retro-fitted outside dealer network.

14-03-11: 3.0 TDI quattro prone to water pump failure and also prone to losing coolant from the water cooled EGR valve.

11-05-11: Apparent "design fault" with 2 litre (petrol) engines that leads to excessive oil consumption. One reader's 6 month old, 4,000 mile A5 2.0 petrol taken in for "modification". New Audi 2.0 petrol engines already have this "modification".

28-3-2012: DMF problems starting to emerge on manual 2.0 TDI 170 where clutches are lifted at idle revs.

20-7-2012: Sporadic reports of high oil consumption of chain cam 1.8 TFSI and 2.0 TFSI engines. Apparently Audi considers 1,000 miles a litre to be "normal" oil consumption for these engines. The reason is probably filling the engines with synthetic oil on the production line and owners not revving the engines sufficiently to bed in the oil rings.

25-8-2012: On the 2.0TDI 143 Multitronic, a combination of Multitronic and slow running torque engine plus the complex drive train route leaves the power steering pump at low pressure at some times and can cause a vibration. Best not to use too much steering lock at low speeds.

8-2-2013: Multitronic transmission failed at 2 years 10 months. Replaced under warranty.

21-2-2013: Non-availability of mud-flaps for the enhanced S Line body shape continues and is a known issue to many, many, Audi drivers but being ignored by Audi themselves.

The out-of-date sat-nav system remains an issue and cannot be resolved.

21-2-2013: Failure reported of the Emission Control System of a TDI S Line which was repaired by Audi Assist through the correct alignment of the exhaust gas pipe where it enters the pipe from the intercooler - a known problem according to the fitter covered by an Audi repair sheet on a number of A4 S-line vehicles. This did seriously and adversely affect the performance of the car as the electrically-controlled valve became heavily blocked with emission gas residue.

16-5-2013: Seems to be a problem with turbo oil seals on 2.0 TDI 143 which, in extreme cases, can send so much lube oil into the combustion chamber that the pistons can hydraulic. So the warning is to idle those turbos before switching off from hot. This came from an Audi dealer who also reported frequent 1.8 and 2.0 TFSI engine failures, but gave no detail.

30-8-2013: T urbo failure on 21 month old 25k mile 2.0 TDI. Turbo, exhaust and DPF replaced under warranty. Stop/start system thought to be the culprit.

1-9-2013: £250 waterpump failure on chain cam 95k mile 2009 A4 2.7 TDI Multitronic, closely followed by failure of EGR cooler at £1,200, but Audi offered 70% of parts price.

21-10-2013: Water leaks onto the driver's and front passenger's feet may be due to faulty bulkhead cable seals. Can affect the ECU. Audi dealers will normally fix this under warranty or goodwill.

5-12-2013: Clutch/DMF failed on 2011 Audi A4 at 20,000 kilometres.

16-12-2013: Another clutch failure reported, this on a 35k mile 2011 A4 Avant 2.0 TDI 170 S Line, first felt as judder, diagnoses as "clutch wear", DMF and clutch both replaced at cost of £1,500.

22-1-2014: Flywheel of 52k mile 2011 A4 1.8 TSI Avant lost three teeth, making it difficult to start.

11-2-2014: Used 13k mile 18-month old A4 2.0 TFSI lost compression in one cylinder. Engine stripped, but Audi dealer found ECU had been reprogrammed so turned down warranty claim, leaving car in bits. Dispute now between the owner and whoever sold him the car.

22-2-2014: Excessive oil consumption from engine of 52k mile 2010 A4 2.0 TFSI. Same piston ring problem as A5 and Golf GTI. Only going 400 miles before requiring more engine oil.

2-4-2014: Oil pump drive failure reported on 123,000 mile March 2008 Audi A4 2.0 TDI 143. Hexagonal shaft rounded off at its corners. Quoted repair bill for new oil pump, new balancer shaft assembly, new turbo and turbo oil feed pipe and new sump at £4,500, but loyalty 'goodwill' from Audi brought bill down to £1,000. First B8 the dealer fitter had seen with the problem.

3-5-2014: Failed electric parking brakes notified on a 2008 Audi A4.

14-5-2014: Both front wheel bearings failed on 80k mile 2009 Audi A4 2.0 TDI. Quoted £538 to replace. Goodwill refused.

5-6-2014: Recurrent slippage problems with clutch and DMF of 2009 Audi A4 B8 Avant 2.0 TDI 170. H istory of clutch and DMF issues previously fixed under warranty. 09/2009 – Gear selection issues; 11/2010 – 12,000 miles clutch judder - complete clutch change; 10/2011 – clutch judder again; 02/2012 – 21,000 miles clutch issues still – new DMF and clutch; 05/2014 – 38,000 miles clutch judder again, requires new clutch and DMF again. G earbox and clutch removed, clutch and flywheel have slippage mark, dealer won't come up with a reason for clutch slippage and now says driver error, with no guarantee problem won't return. Dealer wont do anything else apart from replace at cost or put old clutch back.

15-6-2014: 2012 Audi A4 2.0 TFSI Multitronic suffered failure of throttle switch after seen months, then again in May 2014. On both occasions the ECU software was updated promptly by the supplying Audi dealer.

3-10-2014: Another oil consumption problem reported on a 49k mile 2010 Audi A4 2.0 TFSI quattro. 2.0 litres of oil used in 3,000 miles. Oil consumption now being monitored with standard Audi response that up to 1 litre in 1,000 miles is acceptable.

19-12-2014: 18k mile 4-year-old Audi A4 2.0TFSI suffering severe oil consumption problem.

10-4-2015: Used Approved 16k mile 2013 Audi S4 Avant 3.0V6 Supercharged bought in January 2015 suffering loss of oil pressure as soon as engine gets hot. Dealer has replaced various sensors, oil pump, oil filter but this has not solved the problem. Suspect piston oil rings. Previous owners had suffered same problem. Recommended rejection of the car.

12-6-2015: Audi A4 B8 2.0TFSIs did not get the updated EA888 manifold in head engines.

17-10-2015: 2012 'approved used' Audi S4 3.0-litre 333PS, V6 Supercharged reported to be using 0.36 litres of oil per 1,000 kilometres (621 miles). Within Audi limits for the engine. Worth checking turbo oil seals.

8-11-2015: Reader reported clutch and DMF failure on 2009 A4 B8 2.0TDI in 2012 at 26k miles, then again in late 2015 at 58k miles. Independent garage fitting clutch discovered that a modified clutch release fork was required in accordance with an undated Audi TSB.

9-1-2016: Judder reported from manual drivetrain of 2011 Audi A4 Avant at 76,000 miles.

29-1-2016: 2010 Audi A4 1.8TFSI Multitronic reported to be using 1 litre of oil in 1,500 miles.

20-2-2016: Complaint of dark patch in centre of full beam that new headlight units did not cure. (Same complaint as received of another VAG car in last few days.)

26-9-2016: Severe oil consumption reported of 91k mile 2009 Audi A4 2.0TFSI avant quattro. Garage replaced the PCV valve (engine breather) and updated the ECU with the latest software. Badly corroded sump and front crank seal also replaced, but still needs oil wvery 300 miles. More liklely to be piston oil rings than valve stem oil seals.

9-11-2016: Report of alternator failing on 2011 Audi A4 2.0TDI soon after the timing belt was routinely replaced. Could be the aux belt was put back too tight after the timing belt replacement.

22-3-2017: Report of fuel economy of Audi A4 2.0TDI dropping from from 620 to 570miles per tank after the NOx emissions fix.

27-3-2017: Report of 2009 Audi A4 2.0TDI producing a lot of smoke after NOx emissions fix. The Mass Airflow Meter had been replaced byt a brand nrew Bosch unit, but if it is unplugged the smoke stops.

14-8-2017: Report of Audi A4 B8 2.0TDI 170 manual avant requikring four replacement clutches and DMFs because of juddering. One at 20,000 when owner's father had the car. One at 35,000, one at 35,500 (replaced at the cost of Audi) and now Audi is again advising the gearbox is removed and the clutch checked. I know full well they are going to come back with it requiring a new clutch.

31-8-2017: Report of front offside wheel bearing failing on 2014 Audi A4 B8 at 36,000 miles. Dealer made the owner pay for its replacement.

23-1-2018: Audi has ordered by German Federal Motor Transport Agency (KBA) to recall 127,000 cars following the alleged discovery of emissions cheat devices. Affects Audi A4, A5, A6, A7, Q5, SQ5 and Q7 cars fitted with V6TDI diesel engines. According to German newspaper Bild am Sontag (BaS), KBA ordered these vehicles be recalled after detecting “unacceptable shut-off decides” on several new V6 diesel engines which meet current EU6 emissions standards.

28-2-2018: Report of MMI system of 2014 Audi A4 failing in October 2017 at 14,000 miles: the screen is blank and there are no lights on the controls. Owner took the car back to the dealer and after several hours of diagnosis he was told that the '5F' unit had failed (apparently this is the main controller for the MMI that communicates with the sat nav/radio etc) and it would cost £3,500 to replace. Audi is offering no goodwill gesture, so owner is stuck with a non functioning MMI. Fortunately it doesn't really affect the use of the car because heating and ventilation controls are separate.

25-7-2018: 'Emission Control System' indicator lamp came on in 2014 Audi A4 B8 2.0TDI at 40,500 miles. No change in power or fuel economy. Owner took it to Bosch specialist that services it and they carried out a forced DPF regeneration. Light came back on three weeks later whilst travelling on the motorway having completed about 40 miles on that particular journey at approx 70mph. Garage then carried out diagnostics again and fitted a new exhaust sensor, brought it back but didn't seem sure the problem was fixed. Three days later light came on again. This time garage checked the AdBlue manually and said it was down to 2 litres and was causing the problem (had been topped up with 10 litres four months earlier and inany case the warning light normally comes on to warn when it's low). Two journeys later, the light has come on whilst travelling at 60-70 mph. Again, there is no change in performance. We think that the DPF is not actively regenerating using post-injected diesel. Something wrong with that part of the system.

10-8-2018: After TSB replacement of auxiliary heater element of 2013 Audi A4 B8, coolant pump failed to siwtch off and flattened the car's battery. Audi dealer said nothing to do with the TSB. Independent garage begged to differ.

27-9-2018: Problem with 2014 Audi A4 B8 2.0TDI Teknik at 42,000 miles. Car had been back to Audi dealer a month before problem with the emission light started. It was recalled for the Audi auxillary heater issue. Owner's, my Bosch specialist checked the car's records and found that an ECU reflash was carried out by Audi at the same time. (EA189 NOx emissions fix.) Once 'emission control system' indicator lamp came on there was no change in power or anything else and the car drove as usual. Owner took car to Bosch specialist garage who has maintained it from new. It has now been back five times in an attempt to rectify the problem. Each time the light returns after a couple of weeks or so, usually after/during driving on motorways or A roads. The work carried out so far is: 1. Forced regeneration; 2. Exhaust oxygen sensor replaced; 3. Adblue refilled; 4. Oil - some syphoned off as dipstick showing different measurement to engine management system which may have prevented regeneration; 5. Air filter replaced, forced regeneration. Emission light description in Audi manual: "If the indicator lamp lights up or flashes, a malfunction has occurred which can reduce the quality of the exhaust gas and damage the catalytic converter. Drive slowly to a qualified workshop without delay and have the fault rectified."

29-11-2018: Report of failure of dual mass flywheel of 2009 Audi A4 2.0TSI and also failure of the piston rings that resulted in oil consumption of 1 litre per 250 miles.

5-12-2018: Report of AdBlue re-fill reminder of 2015 Audi A4 B8 not re-setting after re-filling with AdBlue.

17-12-2018: Report of very high oil consumption of 2010 Audi A4 B8 avant with EA888 2.0TSI engine.

15-6-2019: Report of catalogue of disaster with 2013/62 Audi A4 Avant S-Line 1.8TFSI, engine code CJE030161. On 21st May 2018 car would not start. AA called and got it going. 22nd May again car would not start again, at 39,900 miles. AA towed to Audi dealer. Audi dealer did an analysis and discovered that the N488 coolant regulator had failed and had tracked to the V50 coolant pump, back up the wiring loom and to the engine ECU. Owner quoted £4,085.58 to effect a repair but was warned that further damage may be found once they were able to start the vehicle. This proved to be the case because it was then discovered that the parking brake control unit needed to be replaced. The total job cost £4,588.24. Owner then discovered that failure of the N488 on the A8, had been the reason for a safety recall for that model in the USA and Canada (Safety Recall Code 80B9.). Despite this, Audi UK refused any goodwill.

3-7-2019: Report of "rolling sensation" at speed in 2014 Audi A4 1.8TFSI CVT. Suspect failing dampers.

11-10-2019: 2.0TDI PD oil pump drive issue explained by cphaza on<<The problem with the 2.0 PD engine is the drive from the slave balancer shaft to the oil pump, which is a piece of 6 AF hex bar which has inadequate engagement depth with the grooves in the slave shaft. It's the torsional oscillations caused by the balance shafts which destroy the oil pump coupling (the 6mm AF bit of hex) and the chain drive to the balancer shafts before the gear driven systems came out, though these still give problems with the hex key rounding. Think washing machine -> unbalanced load -> keep doing it = new machine. The problem is with lack of concentricity of the drive socket into which the drive rod/hex fits. The drive socket is can be off centre by at least 0.1mm. In engineering terms, this is a massive defect. All the drive sockets in the failed units were off centre, but all the replacement balancer units were dead centre and have not led to a repeat failure. Some replacement balancer units have now done 100k+ miles according to some garages. You will get this problem at some point if you have a 2.0TDi WITH balancer shafts. If your 2.0TDi does NOT have balancer shafts, you will be ok. If you fit the latest balancer shaft/ pump assembly from VAG it will more than likely cure the problem for life as they have made the hex longer and centered it all properly.>>

24-10-2019: Report of EGR of 2012 Audi A4 B8 2.0TDI failing more than two years after the EA189 NOx emissions fix, so outside the 'Rebulding Trust' consequential damage warranty. Owner quoted £650 to replace.

15-11-2019: Report of clutch judder from 24k mile 2015 Audi A4 B8 1.8 TFSI 170PS manual recently purchased from Audi dealer. At slow in-town stop start speeds there is a judder when moving off in 1st gear at low rpm of 1,000 - 1,400 rpm. Sometimes it can appear as if the clutch snatches. However, if brought to around 2,000 rpm before releasing the clutch, the car moves off smoothly. Owner had clutch assessed at a different Audi dealer who pronouced it okay.


31-12-2011: Apparently, all VAG models with the 2.0TDI engine from around 2005 fitted with Siemens peizo injectors are subject to a recall which involves replacing all the injectors FOC. Job takes around 3 hours. A short circuit within the injectors causes the fuel system to shut down and engine cuts out.

4-11-2015: EA288 1.8TFSI and 2.0TFSI engines recalled in USA because the rear camshaft lobe is prone to unexpectedly shear off from the shaft. The failure causes reduced engine power and loss of vacuum pump power, cutting vacuum supply to the brake booster and eventually resulting in increased braking effort."A reduction in engine power and/or increased need for braking effort after vacuum reserve has been depleted while driving can increase the risk of a crash," a statement cautions. The campaign affects approximately 92,000 vehicles including the 2015-2016 Beetle, Beetle Convertible, Golf, Golf GTI, Golf SportWagen, Jetta and Passat. In notifying the National Highway Traffic Safety Administration, VAG stated that the root cause of the camshaft failures has not been fully understood. The company is still continuing an in-depth failure analysis and development of a repair solution, however a fix may not be ready until the end of the first quarter of 2016.

(Undated): TSB at some time between 2010 and 2015 to replace clutch release fork of A4 B8 2.0TDI with a modified release fork. The old release fork may have accounted for clutch and DMF failures.

01-05-2017: R/2017/115:  COOLANT PUMP MAY OVERHEAT. Foreign particles in the engine coolant can lead to a blockage in the additional coolant pump and cause the pump to overheat.Foreign particles in the coolant can lead to a blockage in the additional coolant pump and cause the pump to overheat. Fix: Recall the machines that are likely to be affected and update the software, which will deactivate the additional coolant pump in the event of malfunction. If there has been a malfunction of the additional water pump, it will be replaced. VINS: WAUZZZ8D0CN002863 to WAUZZZ8FXDN018070; WAUZZZ8T0CA007557 to WAUZZZ8TXDA078749; WAUZZZ8K0DA002920 to WAUZZZ8KZDA250141; WA1CFAFP2DA094219 to WA1LFBFPXFA065950; WAUFFBFC9EN010054 to WAUFFBFC9EN010054. Build dates: 01-05-2011 to 31-10-2016.

08-01-2018/R/2017/334: AUXILLIARY HEATER ELEMENT IN AIR CONDITIONING MAY FAIL AND/OR OVERHEAT. The auxilliary heater element in the air conditioner may fail as a result of overheating in the area of the connectors, in conjunction with smoulder damage or potential fire. Fix: Recall the vehicles that are likely to be affected and fit an auxilliary heater element with opimised electrical connectors. The activation of the electric auxilliary heater must be adjusted by updating the software for the air conditioning control console. VINs: WAUZZZ8F9BN017814 to WAUZZZ8F3GN002622; WAUZZZ8K3BA148578 to WAUZZZ8K8GA006511; WAUZZZ8R0BA099157 to WAUZZZ8R9GA037179; WAUZZZ8T6BA072380 to WAUZZZ8T4GA015182. Build dates: 02-04-2011 to 01-08-2015.

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