2008 BMW X6 problems
The 2008 BMW X6 was sold with 2 engines that we have documented: the BMW N62 / N63 and the BMW N54/N55. All of them have serious faults that affect the cars of that year. The safest option is the BMW N54/N55 (verdict “With caution”). Outside the engine, 4 documented faults affect 2008 cars, such as xDrive transfer case failure on the X6 E71.
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2008 BMW X6 score: acceptable reliability
Calculated using only 14 documented faults and their sources: the most serious and frequent faults weigh more. How it is calculated
- Engine4.9From 4.6 to 5.2 depending on the engine
- Gearbox7.32 faults
- Suspension8.1Technical inspection (ITV) only: 0.7 times the defects normal for its age
- Brakes8.31 fault and ITV (technical inspection)
- Tyres and wheels10.0No documented faults
- Steering8.91 fault and ITV (technical inspection)
- Electrical system10.0No documented faults
- Headlights and lights8.6Technical inspection (ITV) only: 0.6 times the defects normal for its age
- Electronics and infotainment10.0No documented faults
- Climate control10.0No documented faults
- Bodywork and interior7.8Technical inspection (ITV) only: 0.9 times the defects normal for its age
- Airbags and safety10.0No documented faults
BMW N62 / N63 engine in the 2008 BMW X6
Names: xDrive50i
- Avoid
N63B44O0 4.4 twin-turbo 408 hp (2008-2014)
408 hp · N63B44O0, N63B44
Gebrauchtwagenberater advises against the 550i with this N63 because of oil consumption (valve stem seals) and the stretched chain, and recommends a car built after July 2013; fiches-auto describes it as the big weak point of the petrol range.[2][3]
Faults that affect 2008 cars
- High severityFrequency: CommonLubricationN63 oil consumption from worn valve stem sealsYes: the original N63 is known for using oil and the German press attributes it to worn valve stem seals. Gebrauchtwagenberater gives €3,000-4,500 as a repair reference in Germany.
- Critical severityFrequency: OccasionalTimingN63 timing chain stretch and guide breakageOn the N63 the timing chain can stretch and the sliding guide can break, leaving plastic debris in the sump and risking serious engine damage. We have found no European recall for this reason.
- Critical severityFrequency: OccasionalTurboAdditional turbo coolant pump with a risk of short circuit and fireIn 2011 BMW recalled 5, 6 and 7 Series, X5 and X6 models built between 2007 and 2011 because of the additional turbo coolant pump: moisture, a short circuit and, in extreme cases, a fire. In 2012 there was another campaign for a crack in the pump, with a more robust version.
- Medium severityFrequency: CommonCoolingN63 coolant loss and cracks in the cylinder headThe N63 loses coolant fairly often: Gebrauchtwagenberater cites it on the 550i, the X5 50i and others, along with cracks in the spark plug well. Owner reports add hoses and the water pump.
BMW N54/N55 engine in the 2008 BMW X6
Names: xDrive35i
- With caution
N54B30 302 hp (2006-2010)
302 hp · N54B30
It is the engine with the most documented faults in the family: high-pressure pump, injectors and wastegates; check which parts have already been replaced.[6][7][8]
- With caution
N54 322 hp (2008-2013)
322 hp · N54B30
It is the engine with the most documented faults in the family: high-pressure pump, injectors and wastegates; check which parts have already been replaced.[6][7][8]
Faults that affect 2008 cars
- High severityFrequency: CommonFuelHigh-pressure fuel pump (HPFP) failureThe N54's high-pressure pump is one of its best-documented failures: most units will have had it replaced at some point. It warns of itself with long cranking and loss of power; the 2010 campaign was US-only.
- Medium severityFrequency: CommonInjectionN54 piezoelectric injector failureThe N54's piezoelectric injectors can clog or leak and cause intermittent misfires. The N55 has solenoid injectors, so it does not share this weak point.
- Medium severityFrequency: CommonTurboTurbo wastegate noise and failureOn the N54 the wastegate rods work loose and produce a metallic rattle; over time they reduce boost pressure. On the N55 it is the electric actuator that fails.
- Medium severityFrequency: CommonCoolingElectric water pump and thermostat failureThe electric water pump on the N54 and N55 fails without warning, at around 100,000-150,000 km, and is usually replaced together with the thermostat. If not dealt with, the engine overheats.
- Medium severityFrequency: CommonLubricationOil leak from the oil filter housing gasketThe oil filter housing gasket on the N54 and N55 leaks oil as it ages; the oil can drip onto the auxiliary drive belt, and there are also leaks from the valve cover.
- Medium severityFrequency: CommonIgnitionOil in the spark plug wells from the rocker cover gasketOn the N54 and N55 the rocker cover gasket hardens with age and lets oil seep into the spark plug wells. Guides treat it as a known fault: it smells of burnt oil and can damage spark plugs and coils.
Faults outside the engine in the 2008 BMW X6
- High severityFrequency: OccasionalGearbox and clutchxDrive transfer case failure on the X6 E71According to fiches-auto.fr, the X6 E71's transfer case appears in 8 mentions out of 128 testimonies, with 4x4/DSC warnings, jerking during manoeuvres and vibrations; one case cites a destroyed case at 184,000 km (2010 model).
- High severityFrequency: OccasionalBrakesElectric parking brake lock-up on the X6 E71According to fiches-auto.fr, the X6 E71's electric parking brake appears in at least 5 mentions out of 128 testimonies, with brakes stuck on or inoperative (one case at 105,000 km, 2010 model) because of the module, actuator or cable.
- High severityFrequency: RareGearbox and clutchBroken front propshaft on the X6 E71According to testimonies on fiches-auto.fr, the X6 E71's front propshaft has broken in several cases (at 100,000 and 142,000 km), with clunking on acceleration and vibration under the floor; the breakage can damage the transfer case and the differential.Appears at around 100,000 km
- High severityFrequency: RareSteeringWear of the steering rack and power steering pump on the X6 E71According to fiches-auto.fr, the X6 E71's power steering appears in 2 mentions: heavy steering and play in the steering rack. One testimony cites €3,700 for replacing the rack at 110,000 km, and fatigue of the electric pump is mentioned.Appears at around 110,000 km
Buying a 2008 BMW X6?
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Frequently asked questions
Is the 2008 BMW X6 reliable?
The 2008 BMW X6 was sold with 2 engines that we have documented: the BMW N62 / N63 and the BMW N54/N55. All of them have serious faults that affect the cars of that year. The safest option is the BMW N54/N55 (verdict “With caution”). Outside the engine, 4 documented faults affect 2008 cars, such as xDrive transfer case failure on the X6 E71.
What is the best year for the BMW X6?
According to our score, the best are 2011, 2009 and 2008 (5.9/10). The year with the worst score is 2012 (5.5/10). Each year's score counts only the engines sold that year and the faults that affect those cars.
What faults does the 2008 BMW X6 have?
The most important ones documented for 2008 cars are: n63 timing chain stretch and guide breakage (BMW N62 / N63, critical severity), additional turbo coolant pump with a risk of short circuit and fire (BMW N62 / N63, critical severity), n63 oil consumption from worn valve stem seals (BMW N62 / N63, high severity), high-pressure fuel pump (HPFP) failure (BMW N54/N55, high severity) and xDrive transfer case failure on the X6 E71 (gearbox and clutch, high severity).
Own a 2008 BMW X6? Tell us what faults you have had and at how many kilometres. Report your fault.
Sources
Every fact on this page links to its source. If you find an error, let us know.
- BMW N63Wikipedia (inglés) · Other source · consulted 8 October 2026
- BMW 5er F10, F11: Typische Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 8 October 2026 · in German
- Fiabilité Bmw Serie 5 (2010-2016) (252 témoignages)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
- BMW USA ruft 130.000 Fahrzeuge mit R6 Biturbo N54 freiwillig zurückBimmerToday · Motoring press · published 26 October 2010 · consulted 5 October 2026 · in German
- BMW N55 Common ProblemsBMW Tuning · Technical documentation · consulted 5 October 2026
- BMW N54Wikipedia · Other source · consulted 5 October 2026
- Todo lo que necesitas saber sobre el motor BMW N54High Performance Academy · Technical documentation · consulted 5 October 2026 · in Spanish
- The Definitive Guide to the BMW N54 EngineFCP Euro · Technical documentation · consulted 5 October 2026