IsItAGoodCar
Reliability Guide

Common Problems with the
2018 BMW X5 M

We've identified 3 known issues that can affect the 2018 BMW X5 M. 1 of these are serious faults that could be expensive to repair.

3
Known Issues
1
Serious
2
Moderate
0
Minor

All Known Issues

Cooling System / Turbo Heat Leaks

SeriousCooling System

Twin-turbo X5 Ms run hot and can develop coolant leaks from auxiliary pumps, hoses, and front heat exchangers. Cars that have lived in traffic or towed regularly need close inspection.

Est. Repair Cost: £200–£1,500
Warning Signs:

Coolant smell after shutdown, Low coolant warnings or visible staining behind the grille

What to Inspect:
  • Inspect all front cooling packs for damage
  • Check undertrays for dried coolant residue
Verified by IsItAGoodCar Research Team

Brake Disc / Pad Wear

ModerateBrakes

The X5 M's weight and speed destroy discs and pads quickly, especially if the car has towed, seen mountain driving, or done track sessions.

Est. Repair Cost: £700–£2,500
Warning Signs:

Judder under heavy braking, Grooved discs and squealing pads

What to Inspect:
  • Inspect disc condition through the wheels
  • Check service history for recent brake work
Verified by IsItAGoodCar Research Team

Front Suspension Bush / Ball Joint Wear

ModerateSuspension & Chassis

Heavy front-end loads and huge wheels accelerate wear in front arms, bushes, and ball joints, causing vague steering and tyre shoulder wear.

Est. Repair Cost: £300–£1,200
Warning Signs:

Clonk from the front axle, Uneven tyre wear and wandering steering

What to Inspect:
  • Look for fresh alignment printouts
  • Inspect inner tyre shoulders and front-arm play
Verified by IsItAGoodCar Research Team

Buying Tips for 2018 BMW X5 M

  • ✓Check the V8 engine (S63) for any signs of coolant or oil leaks in the 'hot V' area between the cylinder banks.
  • ✓Inspect the active anti-roll bars and air suspension struts for leaks; repairs to the dynamic suspension systems are brutally expensive.
  • ✓Weigh the carbon-ceramic brake discs (if fitted) or check the steel discs for a massive lip; stopping a 2.3-tonne M car destroys brakes.
  • ✓Verify the M xDrive transfer case operates smoothly without binding or juddering during tight, low-speed turns.
  • ✓Check the rear tyres for rapid wear; the aggressive rear-biased AWD system consumes rubber at an alarming rate.
  • ✓Ensure the 1,200-mile running-in service was completed, and review the history for regular differential and transmission fluid changes.
Check a 2018 BMW X5 M by Registration