IsItAGoodCar
Reliability Guide

Common Problems with the
2012 Land Rover Range Rover Mk4 (L405)

The launch of the L405 generation Range Rover was a technological leap, featuring an all-aluminium monocoque that shed nearly 400kg compared to its predecessor, transforming its handling and efficiency.

What changed for 2012

  • •Debut of the revolutionary all-aluminium L405 generation.
  • •Introduction of the 3.0-litre TDV6 engine option alongside the 4.4 SDV8 and 5.0 V8.

Common MOT watch-outs

  • !Suspension knocking from the front end, particularly lower control arm bushes.
  • !Software glitches with the infotainment and digital instrument cluster.
4
Known Issues
2
Serious
2
Moderate
0
Minor

All Known Issues

Air Suspension Bag Leaks

SeriousSuspension & Chassis

The rubber air bags perish or crack, causing the car to sag and the compressor to overwork.

Est. Repair Cost: £400–£1,200
Warning Signs:

Car leaning after being parked, Slow lift time, Noisy compressor

What to Inspect:
  • Ride height after sitting overnight
Verified by IsItAGoodCar Research Team

3.0 Diesel Crankshaft Failure

SeriousEngine

Catastrophic crankshaft or bearing failure, often occurring without warning.

Est. Repair Cost: £6,000–£12,000
Warning Signs:

Sudden seizure, Metallic knocking noise

What to Inspect:
  • Oil change history
  • Look for metallic glitter in oil filter
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Front Suspension Lower Arm Wear

ModerateSuspension & Chassis

Front lower control arm bushes wear quickly due to the vehicle weight, causing clonking noises and uneven tyre wear. Budget £700 to replace all arms at once.

Est. Repair Cost: £300–£700
Warning Signs:

Clonking over bumps, Knocking under braking, Uneven front tyre wear

What to Inspect:
  • Lower arm bush condition
  • Drive forward and reverse braking to test
Verified by IsItAGoodCar Research Team

Electrical Gremlins and Module Failures

ModerateElectrics & Electronics

Pre-2015 cars in particular suffer from intermittent electrical faults including window switches, dashboard glitches, faulty fuel gauges, and random module failures. Water ingress and poor battery condition exacerbate these issues.

Est. Repair Cost: £100–£1,000
Warning Signs:

Intermittent electrical faults, Dashboard pixel dropout, Fuel gauge reading incorrectly, Random warning lights

What to Inspect:
  • Battery condition and voltage
  • All switches and buttons
  • Check for stored fault codes
Verified by IsItAGoodCar Research Team

Buying Tips for 2012 Land Rover Range Rover Mk4 (L405)

  • The 3.0 TDV6 engine is prone to crankshaft failure; the 4.4 SDV8 is considered far more robust and is the preferred choice.
  • Listen for a 'clunk' from the suspension over speed bumps, indicating worn bushes.