MajorCommonEngine

BMW 2 Series: N20 High-Pressure Fuel Pump Cam Follower Wear

N20 High-Pressure Fuel Pump Cam Follower Wear is a common engine fault on the BMW 2 Series on the 2014–2021 cars, and we rate it major. Putting it right costs $800 to $3,200 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 27 documented faults on the BMW 2 Series.

Vehicle: BMW 2 Series
Engine: N20
Years: 2014–2021
Fuel: petrol
System: Engine

This page covers the BMW 2 Series 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 2 Series faults27 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 N20B20 direct-injection system uses a mechanical high-pressure fuel pump (HPFP) driven off the intake camshaft via a bucket follower. The follower is prone to accelerated wear, especially when oil change intervals are stretched or low-viscosity oil is used. A worn follower allows the cam lobe to contact the pump body directly, eventually destroying both the cam lobe and the pump. This fault also affects N55 and S55 engines and has been widely documented across the BMW tuning and ownership community.

What you would notice

Hesitation or stumbling under hard acceleration, especially at higher RPM
Long crank time or difficulty starting, particularly when hot
Fuel pressure fault codes stored (P0087 low fuel pressure)
Metallic debris found in oil if follower has fully failed
Engine stall or misfire under load in advanced cases

How to check it

Where to look. Top of cylinder head on the intake camshaft side, under the engine cover

Check oil change history — intervals beyond 12 months or 15,000 km increase risk significantly.
Listen for fuel pressure-related surging or hesitation under acceleration.
If a workshop inspection is possible: Remove the HPFP (located on top of the intake cam cover) and visually inspect the base of the pump and the follower for scuffing or abnormal wear.

Parts involved: High-pressure fuel pump.

What it costs to put right

$800 to $3,200 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 cam follower been inspected or replaced, and at what mileage?”
“Can you show me the full oil change history with dates and mileage?”

Now check the BMW 2 Series 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 2 Series buyer questions

Is n20 high-pressure fuel pump cam follower wear serious on a BMW 2 Series?

We rate it major and common on the BMW 2 Series. The N20B20 direct-injection system uses a mechanical high-pressure fuel pump (HPFP) driven off the intake camshaft via a bucket follower. The follower is prone to accelerated wear, especially when oil change intervals are stretched or low-viscosity oil is used. A worn follower allows the cam lobe to contact the pump body directly, eventually destroying both the cam lobe and the pump. This fault also affects N55 and S55 engines and has been widely documented across the BMW tuning and ownership community.

How much does it cost to fix on a BMW 2 Series?

$800 to $3,200 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 2 Series years are affected?

Our research records this fault on the 2014–2021 BMW 2 Series. 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 oil change history — intervals beyond 12 months or 15,000 km increase risk significantly. Listen for fuel pressure-related surging or hesitation under acceleration. If a workshop inspection is possible: Remove the HPFP (located on top of the intake cam cover) and visually inspect the base of the pump and the follower for scuffing or abnormal wear. Look here: Top of cylinder head on the intake camshaft side, under the engine cover