"Is the 5 Serisi 550i reliable, and what should you check?"
When buying a used BMW 5 Series 550i 2009 (E60/E61 facelift), the most frequently mentioned issue is cooling system problems (plastic components). Oil leaks (gaskets and seals) are also commonly reported.
Engine: N62
N62B48B · 550i · Used in this car from 2008-2010
Strengths
Provides good dynamics
Widely available in our market
Watch-outs
Fuel consumption is rather high
Very picky about oil quality
Suffers from oil and coolant leaks
Known engine issues
ScoringCatalytic converters do not tolerate poor fuel and can fail before 100,000 km, then their debris enters the combustion chambers and causes scoring on cylinder walls. This problem was especially common on early engines, slightly less on N62TU.
Oil consumptionOriginally this engine had a thermostat that only opens at 105°C, which greatly reduces the life of valve stem seals, leading to oil consumption. Another common cause is wear of the crankcase ventilation membranes.
Vanos and ValvetronicThe timing chain is quite reliable and easily lasts 250,000 km or more, but the Double Vanos and Valvetronic systems have much lower service life. Therefore, it is very important for the owner to monitor oil quality and change intervals.
Listed from most frequently reported, each with its source.
Cooling system problems (plastic components)
Often reported
The N62 cooling system has plastic components prone to cracking: water pump, thermostat housings, transfer pipes, and plastic caps/collectors. Cracking can cause rapid overheating, coolant leaks, and potential head damage.
Cooling
Oil leaks (gaskets and seals)
Often reported
Oil leaks frequently occur from the alternator bracket gasket, crankshaft seal, and valve cover gaskets. If not repaired, they can lead to low oil level.
Engine Bay
Ignition coils and misfires
Often reported
In the V8 N62 engine, ignition coil failures cause misfires, rough idle, and power loss. Coils can degrade due to oil residue or heat; diagnosis requires OBD code reading and testing.
Engine Bay
Worn VANOS/Valvetronic and solenoids
Often reported
Variable valve timing (VANOS) and Valvetronic systems can develop leaks or faults over time: o-rings, solenoids, or guides wear, causing rough idle, power loss, and check engine light.
Engine Internal
Catalytic converter failure and internal engine damage
Often reported
The catalytic converter can fail, causing the ceramic honeycomb structure to break apart. Debris can enter the engine or cylinders, leading to piston ring wear and serious damage.
Exhaust Emissions
BMW 5 Serisi 550i technical specs
BMW 5 Serisi 550i (2009): boot 500 L; fuel use 11,2 l/100 km (urban 17 l/100 km · extra-urban 7,8 l/100 km); 0–100 in 5.3 s.
Boot capacity
500 L
Fuel consumption
11,2 l/100 km (urban 17 l/100 km · extra-urban 7,8 l/100 km)
What should I look for when buying a BMW 5 Series 550i?+
When buying a 2009 550i, check the service history, test drive, and look for engine/transmission warnings. Most commonly reported issues: cooling system problems (plastic components); oil leaks (gaskets and seals); ignition coils and misfires.
What are the common problems of the BMW 5 Series 550i?+
Most commonly reported issues: cooling system problems (plastic components); oil leaks (gaskets and seals); ignition coils and misfires.
Is the BMW 5 Series 550i reliable?+
Rather than a simple yes or no, it's best to weigh the proven pros and cons together. This page lists 5 verified findings.
How does Carbeak collect data?+
The cards on this page are derived from Difetti fault database records; the source vehicle is verified for brand, fuel type, engine, and generation match with the target vehicle. Topics with insufficient evidence are not shown.