Air suspension repair — Range Rover, Range Rover Sport and Discovery — Milton Keynes

Signs your air suspension needs looking at

• Sinks on one corner after standing overnight^[15]
• Suspension warning on the dash, and the car limits its speed^[16]
• The compressor runs a long time or cuts out hot^{[11, 16]}
• Stuck at one height, or will only return to standard height^[12]
• A height sensor fault code^[13]

Which cars have it

Range Rover (L322)2002–2012 model years

Four-wheel independent air suspension on a monocoque body, with four ride heights. It has its own page.^{[1, 10]}Range Rover (L322) air suspension repair

Range Rover Sport (L320)2005–2013

Built on the Discovery 3's integrated body frame, with air suspension as standard and three ride heights. Covered by the same Land Rover height sensor bulletin as the L322.^{[2, 13]}

Discovery 3 and Discovery 4 (L319)Discovery 3 from 2004; Discovery 4 2009–2016

Cross-linked, fully independent air suspension, introduced on the Discovery 3 and kept on the Discovery 4.^{[3, 13]}

Range Rover (L405)2012–2021

Electronic cross-linked air suspension with access, on-road and off-road heights, on an all-aluminium body.^[4]

What goes wrong, part by part

The Range Rover L322’s system, as Land Rover’s workshop manual lists it, and how each part fails.

Front struts (air springs)One each side, with the air spring built into the strut

The rubber spring and its seals perish and leak; a failed lower seal is a known cause of a front corner sagging overnight.^{[5, 14, 15]}

Rear air springsOne each side at the rear

Pinholes and perished rubber, so the corner slowly loses air.^{[5, 14]}

Air supply unit (compressor and dryer)Electric piston compressor with an air dryer, sealed in the spare wheel well

Wears until it cannot fill the reservoir or springs; a leak elsewhere makes it run too long and overheat, and the ECU then stops it; the dryer can crack.^{[6, 7, 11, 14, 16]}

Valve block, reservoir and pressure sensorThe reservoir stores air; the valve block sends it to each corner

Leaks at the valve block and its pipe connections — part of Land Rover's own leak check.^{[5, 9]}

Cross-link valvesJoin the left and right springs at low speed for more articulation off-road

Leaks at their connections; a cross-link valve fault is one the ECU logs.^{[8, 9, 12]}

Air pipes and fittingsCarry air between the compressor, reservoir, valve block and springs

Perish or rub through, and leak at the joints.^{[5, 14, 16]}

Height sensorsFour, one per corner, telling the ECU how high each corner sits

Usually a plug, wiring, fixing, linkage or calibration fault rather than the sensor itself — Land Rover says don't replace one with no fault code.^{[5, 13]}

Worth knowing

• The L322 is a monocoque, while the Range Rover Sport L320 and the Discovery 3 and 4 use the Discovery's integrated body frame — so the faults look alike but the parts are not interchangeable. We order by your VIN.^{[1, 2, 3]}
• Land Rover's leak check covers every spring fitting, the valve block and cross-link valve connections, the springs and the reservoir. A leak that is not properly found means good parts replaced and the problem back.^[9]

What we do

1. 1.Repair the air suspension on the L322 and L405 Range Rover, the Range Rover Sport L320 and the Discovery 3 and 4
2. 2.Read the suspension fault codes and live data, including what each height sensor is reporting
3. 3.Raise the car and leak-test the whole system — every spring, pipe joint, the valve block and the reservoir — before anything is ordered
4. 4.Test the compressor: how long it takes to fill, and whether it is cutting out hot
5. 5.Check a height sensor's wiring, plug and linkage before blaming the sensor
6. 6.Replace only the part that failed, then check the car rises, lowers and stays level at every height
7. 7.Calibrate the ride height when the repair needs it, and road test before handover

You get the price for the repair before we start. More on these cars on our Land Rover and Jaguar page.