"Is the 7 Serisi 730li reliable, and what should you check?"
When buying a used BMW 7 Series 730li 2012 (F01 / F02), the most frequently mentioned issue is: Faulty electric water pump. Also, oil leaks (valve cover and oil filter housing) are commonly reported.
Engine: N52
N52B30 · 730li · Used in this car from 2012-2015
Strengths
Good torque at any RPM
Well studied by our workshops
Watch-outs
Many problems in early engines
Cylinder block has no liners
Very sensitive to oil quality
Known engine issues
Scoring and oil consumptionThis engine has an alusil coating instead of cast iron liners and is demanding on fuel quality, plus there is no external fuel filter, so scoring and oil consumption are common. Early 2.5L engines had thin piston rings that quickly stuck.
Vanos and ValvetronicThe variable valve timing systems are sensitive to oil change intervals. Valvetronic malfunctions often lead to camshaft journal wear, and Vanos phasers wear out quickly when their valve filters become clogged.
OverheatingThis engine is very afraid of overheating and the cooling system must be monitored. High temperatures destroy gaskets and cause severe oil leaks, especially from the valve cover, oil filter housing with heat exchanger, and oil pan.
Listed from most frequently reported, each with its source.
Faulty electric water pump
Often reported
The electric water pump on the 3.0 N52 engine is prone to failure over time, causing rapid overheating and risk of engine damage.
Cooling
Oil leaks (valve cover and oil filter housing)
Often reported
Oil leaks from aging gaskets at the valve cover and oil filter housing are common on the N52 engine. If left unrepaired, they can lead to smoke and sensor issues.
Engine Bay
DISA valve / intake manifold faults
Often reported
On the N52 engine, DISA valves and plastic intake manifold components can wear or break, causing noise, idle fluctuation, and check engine light.
Engine Bay
VANOS system issues
Often reported
The variable valve timing (VANOS) system on the N52 engine can cause sluggish response, idle fluctuation, power loss, and fault codes due to clogged solenoids or electrical faults. Often caused by oil deposits blocking the actuators.
Engine Internal
BMW 7 Serisi 730li technical specs
BMW 7 Serisi 730li (2012): boot 500 L; fuel use 8,7 l/100 km (urban 12,6 l/100 km · extra-urban 6,4 l/100 km); 0–100 in 7.5 s.
Boot capacity
500 L
Fuel consumption
8,7 l/100 km (urban 12,6 l/100 km · extra-urban 6,4 l/100 km)
What should I look for when buying a BMW 7 Series 730li?+
When buying a 2012 730li, check the service history, test drive, and look for engine/transmission warning lights. Most commonly reported issues: Faulty electric water pump; Oil leaks (valve cover and oil filter housing); DISA valve / intake manifold faults.
What are the common problems of the BMW 7 Series 730li?+
Most frequently reported issues: Faulty electric water pump; Oil leaks (valve cover and oil filter housing); DISA valve / intake manifold faults.
Is the BMW 7 Series 730li reliable?+
Instead of a simple yes/no, it's better to weigh the proven pros and cons together. This page lists 4 verified findings.
How does Carbeak collect data?+
The cards on this page are derived from the Difetti fault database; the source vehicle is matched to the target vehicle by brand, fuel type, engine, and generation. Topics with insufficient evidence are not shown.