CriticalCommonEngine

BMW X5: N55 High-Pressure Fuel Pump Failure & Hot No-Start

N55 High-Pressure Fuel Pump Failure & Hot No-Start is a common engine fault on the BMW X5 on the 2010–2013 cars, and we rate it critical. Putting it right costs $1,500 to $3,500 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 41 documented faults on the BMW X5.

Vehicle: BMW X5
Engine: N55
Years: 2010–2013
Fuel: petrol
Gearbox: auto
System: Engine

This page covers the BMW X5 as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All BMW X5 faults41 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the High-pressure fuel pump yet. We would rather show none than show a picture of a different part.

What goes wrong

The N55 3.0T petrol engine uses a cam-driven high-pressure fuel pump (HPFP) to supply its direct injection system. The pump piston roller and cam follower wear prematurely, causing sudden loss of fuel rail pressure. The failure characteristically presents as a hot no-start — the vehicle starts and drives normally when cold but fails to restart after being parked hot following a drive, known as hot soak failure. The cam follower debris can contaminate engine oil and score the camshaft lobe. HPFP failure is a documented known issue in North American markets where some warranty extensions were issued.

What you would notice

Engine cranks strongly but will not start after being driven and parked hot (classic hot soak no-start)
Starts normally when cold but fails to restart after a 20-30 minute hot stop
Long cranking time before engine catches
Check Engine light with high-pressure fuel rail codes P0087 or P0191
Rough running or lean misfires under acceleration

How to check it

Where to look. High-pressure fuel pump mounted on top of engine valley, driven directly off the intake camshaft

Conduct a deliberate hot-soak test — drive until fully warm, park for 20-30 minutes with engine off, then attempt restart immediately. Ask the seller specifically whether the car has ever been left stranded after a hot stop. If a workshop inspection is possible: Check OBD for fuel pressure or high-pressure system fault codes. A BMW specialist can inspect the cam follower condition via the HPFP access point without removing the pump.

Parts involved: High-pressure fuel pump.

What it costs to put right

$1,500 to $3,500 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 high-pressure fuel pump or cam follower been replaced?”
“Has the car ever failed to start after being parked hot following a drive?”
“Are there any stored fuel system fault codes in the DME?”

Now check the BMW X5 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.

BMW X5 buyer questions

Is n55 high-pressure fuel pump failure & hot no-start serious on a BMW X5?

We rate it critical and common on the BMW X5. The N55 3.0T petrol engine uses a cam-driven high-pressure fuel pump (HPFP) to supply its direct injection system. The pump piston roller and cam follower wear prematurely, causing sudden loss of fuel rail pressure. The failure characteristically presents as a hot no-start — the vehicle starts and drives normally when cold but fails to restart after being parked hot following a drive, known as hot soak failure. The cam follower debris can contaminate engine oil and score the camshaft lobe. HPFP failure is a documented known issue in North American markets where some warranty extensions were issued.

How much does it cost to fix on a BMW X5?

$1,500 to $3,500 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 BMW X5 years are affected?

Our research records this fault on the 2010–2013 BMW X5. 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.