This Range Rover Sport PHEV was towed in with the front right air suspension collapsed and a high-voltage system warning on the dash. Here is how we found the fault and fixed it.
Job completed: July 2026
| Car | Range Rover Sport PHEV (P400e) |
|---|---|
| Symptom | Front right corner sitting very low, a high-voltage system fault warning on the dash, car unsafe to drive and towed in |
| Fault found | Failed front right air suspension strut, which let the front right corner collapse |
| Repair done | Replaced the front right air strut with a BWI Europe OEM unit and reset the air suspension system |
| Parts | BWI Europe OEM air suspension strut |
| Time taken | Confirmed after diagnosis and once the part is on hand |
| Cost | Quoted after diagnosis identified the failed front right strut |
| Warranty | Road tested before handover |
The owner called to say the car was sitting very low on the front right corner. The dash was showing a high-voltage system fault message even though the visible problem was the suspension. The car was too low to drive safely, so it had to be towed to us.
We read the suspension faults during diagnosis with our JLR-compatible scan tool, and everything pointed at the front right strut. After the strut was replaced and the system reset, the car sat level again.
The Range Rover Sport PHEV (P400e) rides on electronic air suspension, pressurised by a compressor and controlled by the suspension ECU. At the front right, the corner is carried by an air strut assembly whose airbag inflates or deflates to adjust the ride height and stiffness, along with a conventional damper inside.
Air suspension parts are wear items on any car that carries them. An airbag membrane can crack with age and heat cycles, and when it goes, the strut loses pressure and the corner sits down. Singapore's heat is hard on rubber components like these.
We read the suspension faults with our JLR-compatible scan tool to support the diagnosis, and the failed front right strut was identified and replaced as a complete unit.
The correct fix was a replacement strut, not a patch: the failed strut was replaced as a complete unit.
The rubber airbag inside each air strut is a flexible membrane that inflates and deflates thousands of times over the life of the car. Heat, ozone in the atmosphere and age gradually harden and crack the rubber. Once the membrane develops a leak, the strut loses pressure and the corner collapses.
A strut can leak slowly or let go quickly once a crack develops. Heat speeds up the ageing of the rubber, and Singapore gives it plenty of that.
We replaced the failed front right air suspension strut with a BWI Europe OEM unit.
We road tested the car before handover to confirm the ride height held and stayed level.
What an air strut replacement costs depends on which corner failed and whether any related parts such as the compressor or valve block need attention, so we scan and quote first. The strut itself is a significant part of the cost; we fit an OEM-specification unit rather than a cheap pattern part.
We scan the system to support the diagnosis, check the compressor and valve block, then quote before any parts are ordered.
A few things are worth watching for on any car with air suspension. If the car sits lower on one corner overnight or after parking for a few hours, that corner is losing pressure somewhere in the air suspension circuit. An air suspension warning that keeps coming back, even after reset, means a fault that has not been resolved.
Having the suspension system scanned when you see any height change or warning light is the best way to catch a failing component before a corner collapses completely and leaves you stranded.
This Land Rover Range Rover Sport P400e (Air suspension strut replacement and system reset) was handled at 1 Car Service, an independent workshop in Sin Ming AutoCity, Singapore. We hold a 4.9★ rating from 1,775+ Google reviews.
WhatsApp us your car model, year and what it is doing. We will tell you what is likely wrong and what it costs before any work begins. We use JLR-compatible diagnostic tools to read the exact fault before quoting.
It depends on which corner failed and whether the compressor or valve block also need attention, so we scan the system first and quote before any parts are ordered. The OEM strut is a significant part of the cost.
On this Range Rover Sport PHEV, a high-voltage system fault appeared on the dash at the same time as the suspension collapsed. On a PHEV we treat any high-voltage warning seriously and check what is actually behind it before any work.
On this job the failed strut was replaced as a complete unit; a failed airbag cannot be reliably patched. We fitted a BWI Europe OEM unit, made to the same specification as the factory strut.
Yes. We use JLR-compatible scan tools to read the suspension fault data and support the diagnosis, and to reset the system after the repair, which is part of fitting a new strut.
The job covers removal of the old strut, fitting the new unit, a system reset and a test drive to confirm the fix. We confirm the timeline after diagnosis and once the replacement strut is on hand.
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