BMW X4: common faults & what to check

Which BMW X4 are you looking at?

3 generation variants documented. Pick the shape you recognise: the faults, the servicing and the timeline below all narrow to it. Free, no account needed.

Petrol

2 variants documented

2014–nowF262014–nowF262.0 turbo petrolPetrolDocumented issues7 knownSee faults & what to checkPhoto: M 93 via Wikimedia Commons, CC BY-SA 3.0 de.

2014–nowF262014–nowF263.0 turbo petrolPetrolDocumented issues4 knownSee faults & what to checkPhoto: M 93 via Wikimedia Commons, CC BY-SA 3.0 de.

Diesel

1 variant documented

2014–nowF262014–nowF262.0 dieselDieselDocumented issues3 knownSee faults & what to checkPhoto: M 93 via Wikimedia Commons, CC BY-SA 3.0 de.

Now narrow it to the engine

A 1.8 and a 2.4 of the same car do not fail the same way, so the faults below narrow to the engine as well as the year. Free, no account needed.

Start your free check on this BMW X4

No plate needed. You get the risk score, the buyer's checklist and the guided inspection for the exact car you picked above — not the whole nameplate.

The checks worth doing on a BMW X4 before you hand over any money. Every documented fault is listed below, each with its own page.

• Serious issue

  Start cold and listen for chain rattle persisting beyond 2 seconds from the front of the engine.

  See why

  N20 2.0T Timing Chain and Guide Rail Failure

  The N20 2.0T engine fitted to early F26 X4 uses a single-row timing chain with plastic guide rails prone to premature elongation. The chain stretches beyond service limits causing retarded cam timing and if ignored results in catastrophic engine failure from jumped timing. The condition is identical to the same engine in the F25 X3 and is covered by BMW TSB SI B11 05 14.

  What you would notice

  • Rattling noise from front of engine on cold start
  • Check engine light with timing correlation codes P0008 or P0016
  • Rough idle or misfires after warm-up
  • Hard starting or stalling under acceleration

  Typically $3,000–$7,000 to put right.

• Serious issue

  Listen for chain rattle on cold start, scan for timing/VANOS codes, and confirm whether the revised chain kit has been fitted.

  See why

  N20/N26 timing chain guide failure

  The F26 X4's N20/N26 turbo engines are prone to timing chain guide wear and stretch, giving cold-start rattle. Chain failure causes catastrophic engine damage, so this is a priority inspection.

  What you would notice

  • Cold-start rattle
  • Timing correlation codes
  • Rough running
  • Check engine light

  Typically $2,500–$6,500 to put right.

• Costly issue

  Inspect the transfer case body and input shaft area for oil residue.

  See why

  xDrive ATC Transfer Case Clutch Pack Failure

  The F26 X4 uses the same xDrive ATC transfer case architecture as the F25 X3, with electronically controlled multi-plate clutch packs distributing torque to the rear axle. Clutch packs wear under sustained AWD demand and overheat, while the input shaft seal leaks causing fluid loss and dry running. The electromagnetic actuator can also fail. The condition manifests as AWD warning lights progressing to total loss of AWD function.

  What you would notice

  • xDrive warning light on instrument cluster
  • Low-speed cornering shudder or vibration
  • AWD fault message in iDrive menu
  • Oil seepage visible beneath transfer case unit

  Typically $2,500–$6,500 to put right.

• Costly issue

  Test drive on varied road surfaces and note any front-end clunking.

  See why

  Front Control Arm Bushing and Ball Joint Wear

  The F26 X4 shares front suspension architecture with the F25 X3 platform. Rubber bushings in the front lower control arms and the integral link suspension deteriorate with mileage and age. Ball joints also wear, causing play in the front wheel bearings and suspension geometry deviation. The result is steering wander, braking instability, and premature tyre wear. Failures often occur together requiring comprehensive front suspension refresh.

  What you would notice

  • Steering wander or vague on-centre feel
  • Clunking from front suspension over rough surfaces
  • Vehicle pulling to one side during braking
  • Uneven or feathered tyre wear on front axle

  Typically $1,000–$2,500 to put right.

• Costly issue

  Open the bonnet AFTER the test drive rather than before, and smell for hot oil — that is the giveaway on this one.

  See why

  B58 oil filter housing gasket leak onto the exhaust

  The most commonly reported fault on the B58 six-cylinder is the oil filter housing gasket hardening and letting oil seep out. It runs down onto the exhaust below, which is why the first thing an owner notices is a burning smell after a drive and sometimes a wisp of smoke from the engine bay rather than a puddle on the ground. It is a well-understood job and not an expensive one by the standards of the car, but it is worth spotting because oil on a hot exhaust is a fire risk and because a seller can honestly describe it as "a small leak" without realising what it sits above. The B58 is otherwise a genuinely robust engine.

  What you would notice

  • Burning-oil smell after driving, strongest with the bonnet open
  • Wisps of smoke from the engine bay at idle when hot
  • Oil wetness or baked black residue on the side of the engine
  • Oil level dropping slowly with nothing on the driveway

  Typically $600–$1,600 to put right.

• Costly issue

  Check the transfer case for leaks, test for driveline bind or judder in tight low-speed turns, and scan for xDrive faults.

  See why

  Transfer case oil leak / actuator wear

  The X4's xDrive transfer case can leak oil and suffer actuator motor wear, leading to driveline binding, judder or warning lights. Neglected transfer case fluid accelerates internal wear.

  What you would notice

  • Driveline judder in tight turns
  • 4x4/xDrive warning light
  • Transfer case oil weep
  • Binding on full lock

  Typically $500–$3,500 to put right.

BMW X4 service schedule

What falls due, and at what distance, for each generation of the BMW X4. These are the model’s intervals — the car’s own service book is the only thing that can tell you what has actually been done to it.

What these repairs cost on other cars

Some of the BMW X4’s documented faults are repairs other models share. Each page lists the documented NZ cost for every model it affects.

• Timing Chain Replacement Cost
• EGR Valve and Cooler Repair Cost

Other BMW models