MajorCommonFluid Leaks

Citroen C5: Hydraulic Suspension Pump Motor Wear and LHM Fluid Leaks

Hydraulic Suspension Pump Motor Wear and LHM Fluid Leaks is a common fluid leaks fault on the Citroen C5 on the 2001–2017 cars, and we rate it major. Putting it right costs $800 to $2,500 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 15 documented faults on the Citroen C5.

Vehicle: Citroen C5
Years: 2001–2017
System: Fluid Leaks

This page covers the Citroen C5 as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Citroen C5 faults15 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph for this fault yet. We would rather show none than show a picture of something else.

What goes wrong

The electric pump that pressurises the Hydractive III system wears internally at high mileage, reducing system pressure and causing slow or incomplete ride height adjustment. LHM mineral oil leaks from pump seals, high-pressure hose connections, or sphere unions are common on older examples. LHM leaks must be rectified promptly — running the system low on fluid accelerates pump damage and can cause complete hydraulic failure.

What you would notice

Slow or incomplete ride height adjustment after starting
Hydraulic warning light on dashboard
Green or dark fluid visible under the vehicle (LHM is green)
Pump running continuously or making unusual noise

How to check it

Where to look. Hydraulic pump unit in engine bay; LHM high-pressure hoses throughout vehicle

Check LHM reservoir level and inspect for green fluid staining around the pump, hose unions, sphere connections, and under the vehicle.
Monitor how quickly the pump cycles during a test drive.
Inspect high-pressure hose unions for weeping.
Confirm reservoir has been topped up recently as a warning sign.

What it costs to put right

$800 to $2,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Has the LHM fluid been topped up recently?”
“Are there any hydraulic fluid leaks currently?”
“Has the hydraulic pump been replaced or rebuilt?”

Now check the Citroen C5 you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Citroen C5 buyer questions

Is hydraulic suspension pump motor wear and lhm fluid leaks serious on a Citroen C5?

We rate it major and common on the Citroen C5. The electric pump that pressurises the Hydractive III system wears internally at high mileage, reducing system pressure and causing slow or incomplete ride height adjustment. LHM mineral oil leaks from pump seals, high-pressure hose connections, or sphere unions are common on older examples. LHM leaks must be rectified promptly — running the system low on fluid accelerates pump damage and can cause complete hydraulic failure.

How much does it cost to fix on a Citroen C5?

$800 to $2,500 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Citroen C5 years are affected?

Our research records this fault on the 2001–2017 Citroen C5. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

Check LHM reservoir level and inspect for green fluid staining around the pump, hose unions, sphere connections, and under the vehicle. Monitor how quickly the pump cycles during a test drive. Inspect high-pressure hose unions for weeping. Confirm reservoir has been topped up recently as a warning sign. Look here: Hydraulic pump unit in engine bay; LHM high-pressure hoses throughout vehicle