"Is the 7 Serisi 730d reliable, and what should you check?"
When buying a used BMW 7 Series 730d 2020 (G11 / G12 / LCI), the most frequently mentioned issue: EGR cooler leaks and failures. Also, high-pressure pump/injector problems (HPFP) are commonly reported.
Engine: B57
B57D30A · 730d · Used in this car from 2016-2022
Known engine issues
Swirl flapsThe most known problem of this diesel is contamination of the intake manifold and its swirl flaps, resulting in power loss and unstable engine operation. In severe cases, the flap axle breaks and the manifold must be replaced.
Timing chain stretchGenerally, the timing chain of modular series engines lasts 200-250 thousand km or more, but for powerful diesels with huge torque, replacement by 100,000 km is not uncommon.
Oil leaksOn the specialized forum, there are many complaints about leaks from the pressure sensor and valve cover. If replacing the cover assembly does not help, the gasket under the camshaft bed leaks.
+2 more issues on the engine detail page
Known issues and risks
Listed from most frequently reported, each with its source.
EGR cooler leaks and failures
Often reported
The EGR circuit, especially the EGR cooler on the 3.0 diesel B57, frequently reports leaks or failures. The issue can cause coolant to enter the intake circuit, leading to white smoke from the exhaust and coolant loss.
Exhaust Emissions
High-pressure pump/injector problems (HPFP)
Often reported
High-pressure injection diesel engines may experience issues with the high-pressure pump or injectors (e.g., partial clogging, wear, or piezo failures).
Fuel System
Turbo/wastegate actuator failure
Often reported
In 3.0 turbo diesel models, there are recurring reports of supercharger component issues: electronic wastegate actuator failure or turbine wear can cause abnormal noises, loss of turbo pressure, power drops, and limp mode.
Turbo
BMW 7 Serisi 730d technical specs
BMW 7 Serisi 730d (2020): boot 515 L; fuel use 5,2 l/100 km (urban 6,5 l/100 km · extra-urban 4,5 l/100 km); 0–100 in 5.6 s.
Boot capacity
515 L
Fuel consumption
5,2 l/100 km (urban 6,5 l/100 km · extra-urban 4,5 l/100 km)
What should I look for when buying a BMW 7 Series 730d?+
When buying a 2020 730d, check the service history, test drive, and look for engine/transmission warnings. The most commonly reported issues: EGR cooler leaks and failures; high-pressure pump/injector problems (HPFP); turbo/wastegate actuator failure.
What are the chronic problems of the BMW 7 Series 730d?+
The most commonly reported issues: EGR cooler leaks and failures; high-pressure pump/injector problems (HPFP); turbo/wastegate actuator failure.
Is the BMW 7 Series 730d reliable?+
Rather than a simple yes/no, it's necessary to evaluate the proven pros and cons together. This page lists 3 verified findings.
How does Carbeak collect data?+
The cards on this page are derived from the Difetti fault database records; brand, fuel, engine, and generation compatibility between the source vehicle and target vehicle are verified. Topics with insufficient evidence are not shown.