2016 BMW X4 problems

• N57D30 245-258 hp, single turbo (O0/O1, 2008-2019)

  245–258 hp · N57D30O0, N57D30O1, N57D30OL

  The same documented rear timing chain risk and inclusion in the EGR cooler service campaign as the rest of the N57 range.^[3][4]

  With caution

• N57D30 299-313 hp twin turbo (T0/T1, 2009-2019)

  299–313 hp · N57D30T0, N57D30T1, N57D30TOP

  It shares the general timing chain risk and the EGR campaign, and adds the documented risk of loss of thrust through the vacuum circuit or the actuator of the two turbos.^[3][5]

  With caution

Faults that affect 2016 cars

• Critical severityFrequency: CommonTimingRear timing chain wearThe N57 inherits from the N47 the timing chain at the rear of the block, next to the gearbox, which complicates any repair. Unlike the N47, there is no documented campaign or wave of mass claims, and cases of serious wear appear mainly above 200,000 km.
• High severityFrequency: CommonTurboLoss of thrust on twin-turbo versions due to the vacuum circuit or the actuatorOn the twin-turbo versions (335d, 535d, xDrive35d/40d) it is common to lose thrust at low revs because of a degraded vacuum circuit or dirt in the actuator that synchronises the turbos, not because of a mechanical turbo failure. The variable-geometry turbo is also cited, more generically.
• Medium severityFrequency: CommonOtherCrankshaft pulley vibration damper wearThe N57's crankshaft vibration damper (pulley) wears with use and, according to a technical guide to the engine, usually needs replacing between 80,000 and 120,000 km, giving warning with abnormal noises before failing completely.Appears at around 80,000 km

• N55B30M0 302 hp (2009-2018)

  302 hp · N55B30M0

  Simpler than the N54 (one turbo and solenoid injectors), but it keeps the oil leaks from the filter housing and the electric water pump; check both.^[6][7][8]

  With caution

• N55B30 315 hp (2011-2018)

  315 hp · N55B30

  Simpler than the N54 (one turbo and solenoid injectors), but it keeps the oil leaks from the filter housing and the electric water pump; check both.^[6][7][8]

  With caution

• N55B30O0 322 hp (2014-2016)

  322 hp · N55B30O0

  Simpler than the N54 (one turbo and solenoid injectors), but it keeps the oil leaks from the filter housing and the electric water pump; check both.^[6][7][8]

  With caution

Faults that affect 2016 cars

• 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.

• Medium severityFrequency: OccasionalGearbox and clutchxDrive transfer case failure: jerking and vibrations at low speedAccording to reports on fiches-auto.fr, the xDrive transfer case can cause jerking, vibrations and noise at low speed; in one case it was replaced at 110,000 km. The fiche points to worn actuator gears or tyres of different circumference.
• Medium severityFrequency: OccasionalGearbox and clutchNoise, shaking and oil leaks from the rear differentialFive reports on fiches-auto.fr describe grinding noises, shaking on deceleration and oil leaks at the rear axle; in one case the differential was replaced at 55,000 km despite regular servicing.
• Low severityFrequency: RareSuspensionRear suspension noise and damaged rear wheel bearingTwo reports on fiches-auto.fr: a rubbing noise from the rear suspension at 23,000 km, which required replacing a shock absorber and spring cup, and a rear wheel bearing failure at 136,000 km.