The high pressure pump of these common rail diesels (Bosch CP4) can fail while driving.
Applies to the engine N47D20, N57D30.
2003–2010. The fault list covers this generation and the engines in it. If the listing gives the exact version, pick it below.

Rudolf Stricker / CC BY-SA 3.0
What to watch for
The list covers the generation, the engines and the transmissions. Once you pick the version, only the faults that apply to it stay.
The high pressure pump of these common rail diesels (Bosch CP4) can fail while driving.
Applies to the engine N47D20, N57D30.
In these engines the water pump is not belt driven but has its own electric motor.
Applies to the engine N52B30, N54B30, N46NB20 and 8 more.
The internal fins of the exhaust gas recirculation cooler crack over time, and glycol coolant leaks into the intake, where it mixes with soot.
Applies to the engine N47D20, N57D30.
The crankcase breather valve and its four lines often fail.
Applies to the engine M54B22, M54B25, M54B30.
The fastening of the swirl flaps in the intake works loose from the vibration of the engine, and a flap can come away.
Applies to the engine M47D20TU2.
The swirl flaps in the intake manifold are held by screws, and engine vibration can work them loose beyond 120,000 kilometres.
Applies to the engine M47D20TU2.
The DISA valve is the black box on the side of the intake manifold, and it adjusts the length of the intake so that there is more torque at low revs.
Applies to the engine M54B22, M54B25, M54B30.
The timing chain stretches from 180,000 km, and the chain tensioner no longer holds it properly.
Applies to the engine M47D20TU2.
Repair: 150–300 EUR
21 more faults belong to this generation. On the version page, only the ones that apply stay.
The manufacturer fixes these for free at a franchised dealer. Ask with the VIN whether it was done. The list covers the whole generation. We did not filter it by model year. Some apply only to a narrower production window.
Most recent: 19 November 2025
SR/00581/26Safety recallInjuries19 November 2025 · EU Safety GateThe chemical substances in the inflators of the TAKATA PSDI4 airbags may deteriorate over time, particularly in warm, humid climates. This could cause the airbag to rupture with too much force in the event of an accident, which could lead to serious or even fatal injuries in the worst-case scenario. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Request to stop driving Date of entry into force: 19/11/2025 Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: 31/10/2025
A12/00017/19Safety recallInjuriesno date · EU Safety GateThe gas generator on the driver side airbag could burst in the event of airbag activation if it had been exposed to high air humidity, high temperatures and considerable temperature fluctuations over several years. This could result in metal parts being discharged, increasing the risk of injury of the vehicle occupants. No information
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/0202/17Safety recallInjuriesno date · EU Safety GateThe universal joint of the drive shaft might break, causing a sudden loss of propulsion.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/02573/24Safety recallInjuriesno date · EU Safety GateThe propellant in the driver airbag may deteriorate over time. If the airbags deploy, it could result in fragments from the inflator injuring the vehicle's occupants. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/0266/17Safety recallInjuriesno date · EU Safety GateIf the driver's airbag is deployed, the inflator might burst if it was subject to high air humidity, high temperatures and substantial temperature fluctuations over a number of years. This may result in the ejection of metal parts, which could cause injury or death to the driver and the passengers.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/0484/19Safety recallInjuriesno date · EU Safety GateOwing to retrofitting of the steering wheel, certain vehicles may be equipped with a driver airbag that has a gas generator which could burst in the event of airbag activation if it has been exposed to moisture and heat cycles over time. This may result in metal parts being discharged, which could lead to injury or death of the vehicle occupants.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
A12/1067/19Safety recallFireno date · EU Safety GateThe battery positive (B+) transfer point in the boot may corrode. This can result in increased contact resistance, potentially leading to malfunction of the power supply and increased risk of fire.
Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown
Engines and transmissions in this generation
A fault is often tied to the engine, not to the whole generation. You find the engine code in the registration document.
E60 · 2003–2010
The fault list opens on the version page.
284 versions
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GM5L40
520d
2003–2007 · 520d
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GS6
520d
2003–2007 · 520d
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GS6
520d Corporate Lease
2007–2010 · 520d Corporate Lease
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GM5L40
520d Corporate Lease
2007–2010 · 520d Corporate Lease
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GM5L40
520d Corporate Lease Executive
2007–2010 · 520d Corporate Lease Executive
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GM5L40
520d Corporate Lease High Executive
2007–2010 · 520d Corporate Lease High Executive
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GM5L40
520d Executive
2003–2007 · 520d Executive
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GM5L40
520d High Executive
2003–2007 · 520d High Executive
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GM5L40
520d Touring
2004–2007 · 520d Touring
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GS6
520d Touring
2004–2007 · 520d Touring
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · ZF6HP-BMW
520d Touring Corporate Lease
2007–2010 · 520d Touring Corporate Lease
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GS6
520d Touring Corporate Lease
2007–2010 · 520d Touring Corporate Lease
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GM5L40
520d Touring Corporate Lease Executive
2007–2010 · 520d Touring Corporate Lease Executive
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GM5L40
520d Touring Corporate Lease High Executive
2007–2010 · 520d Touring Corporate Lease High Executive
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GM5L40
520d Touring Executive
2004–2007 · 520d Touring Executive
2.0 l · 1995 cm³
M47D20TU2 · N47D20 · GM5L40
520d Touring High Executive
2004–2007 · 520d Touring High Executive
2.0 l · 1995 cm³
N43B20 · N46NB20 · GS6
520i Corporate Lease
2007–2010 · 520i Corporate Lease
2.0 l · 1995 cm³
N43B20 · N46NB20 · ZF6HP-BMW
520i Corporate Lease
2007–2010 · 520i Corporate Lease
2.0 l · 1995 cm³
N43B20 · N46NB20 · ZF6HP-BMW
520i Corporate Lease Executive
2007–2010 · 520i Corporate Lease Executive
2.0 l · 1995 cm³
N43B20 · N46NB20 · ZF6HP-BMW
520i Corporate Lease High Executive
2007–2010 · 520i Corporate Lease High Executive
2.0 l · 1995 cm³
N43B20 · N46NB20 · GS6
520i Touring Corporate Lease
2007–2010 · 520i Touring Corporate Lease
2.0 l · 1995 cm³
N43B20 · N46NB20 · ZF6HP-BMW
520i Touring Corporate Lease
2007–2010 · 520i Touring Corporate Lease
2.0 l · 1995 cm³
N43B20 · N46NB20 · ZF6HP-BMW
520i Touring Corporate Lease Executive
2007–2010 · 520i Touring Corporate Lease Executive
2.0 l · 1995 cm³
N43B20 · N46NB20 · ZF6HP-BMW
520i Touring Corporate Lease High Executive
2007–2010 · 520i Touring Corporate Lease High Executive
2.0 l · 1995 cm³
N43B20 · N43B20OL · GM5L40
520i
2007–2010 · 520i
2.0 l · 1995 cm³
N43B20 · N43B20OL · GS6
520i
2007–2010 · 520i
2.0 l · 1995 cm³
N43B20 · N43B20OL · GM5L40
520i Business Line
2007–2010 · 520i Business Line
2.0 l · 1995 cm³
N43B20 · N43B20OL · GS6
520i Business Line
2007–2010 · 520i Business Line
2.0 l · 1995 cm³
N43B20 · N43B20OL · GM5L40
520i Executive
2007–2010 · 520i Executive
2.0 l · 1995 cm³
N43B20 · N43B20OL · GM5L40
520i High Executive
2007–2010 · 520i High Executive
2.0 l · 1995 cm³
N43B20 · N43B20OL · GS6
520i Touring
2007–2010 · 520i Touring
2.0 l · 1995 cm³
N43B20 · N43B20OL · ZF6HP-BMW
520i Touring
2007–2010 · 520i Touring
2.0 l · 1995 cm³
N43B20 · N43B20OL · GM5L40
520i Touring Business Line
2007–2010 · 520i Touring Business Line
2.0 l · 1995 cm³
N43B20 · N43B20OL · GS6
520i Touring Business Line
2007–2010 · 520i Touring Business Line
2.0 l · 1995 cm³
N43B20 · N43B20OL · GM5L40
520i Touring Executive
2007–2010 · 520i Touring Executive
2.0 l · 1995 cm³
N43B20 · N43B20OL · ZF6HP-BMW
520i Touring High Executive
2007–2010 · 520i Touring High Executive
2.0 l · 1995 cm³
N47D20 · GM5L40
520d
2007–2010 · 520d
2.0 l · 1995 cm³
N47D20 · GS6
520d
2007–2010 · 520d
2.0 l · 1995 cm³
N47D20 · GS6
520d Business Line
2007–2010 · 520d Business Line
2.0 l · 1995 cm³
N47D20 · GM5L40
520d Business Line
2007–2010 · 520d Business Line
2.0 l · 1995 cm³
N47D20 · GM5L40
520d Executive
2007–2010 · 520d Executive
2.0 l · 1995 cm³
N47D20 · GM5L40
520d High Executive
2007–2010 · 520d High Executive
2.0 l · 1995 cm³
N47D20 · GM5L40
520d Touring
2007–2010 · 520d Touring
2.0 l · 1995 cm³
N47D20 · GS6
520d Touring
2007–2010 · 520d Touring
2.0 l · 1995 cm³
N47D20 · GM5L40
520d Touring Business Line
2007–2010 · 520d Touring Business Line
2.0 l · 1995 cm³
N47D20 · GS6
520d Touring Business Line
2007–2010 · 520d Touring Business Line
2.0 l · 1995 cm³
N47D20 · GM5L40
520d Touring Executive
2007–2010 · 520d Touring Executive
2.0 l · 1995 cm³
N47D20 · GM5L40
520d Touring High Executive
2007–2010 · 520d Touring High Executive
2.2 l · 2171 cm³
M54B22 · ZF6HP26
520i
2003–2007 · 520i
2.2 l · 2171 cm³
M54B22 · GS6
520i
2003–2007 · 520i
2.2 l · 2171 cm³
M54B22 · GM5L40
520i Executive
2003–2007 · 520i Executive
2.2 l · 2171 cm³
M54B22 · GM5L40
520i High Executive
2003–2007 · 520i High Executive
2.5 l · 2494 cm³
M54B25 · GM5L40
525i
2003–2007 · 525i
2.5 l · 2494 cm³
M54B25 · GS6
525i
2003–2007 · 525i
2.5 l · 2494 cm³
M54B25 · GM5L40
525i Executive
2003–2007 · 525i Executive
2.5 l · 2494 cm³
M54B25 · ZF6HP-BMW
525i High Executive
2003–2007 · 525i High Executive
2.5 l · 2494 cm³
M54B25 · GM5L40
525i Touring
2004–2007 · 525i Touring
2.5 l · 2494 cm³
M54B25 · GS6
525i Touring
2004–2007 · 525i Touring
2.5 l · 2494 cm³
M54B25 · GM5L40
525i Touring Executive
2004–2007 · 525i Touring Executive
2.5 l · 2494 cm³
M54B25 · GM5L40
525i Touring High Executive
2004–2007 · 525i Touring High Executive
Neighbouring generations
E60/E61 (2003-2010). If the listing is from the changeover year, look at the neighbour too.
Previous generation
This is the earliest.
This generation
E60 · 2003–2010
Next generation
F10 · 2010–2017Common questions
2003–2010. The changeover year can fall in two generations. If the listing is from that year, look at the neighbour too.
No. It depends on the engine and the transmission too.
The fault list is.
We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.