"Is the 7 Serisi 750d reliable, and what should you check?"
When buying a used BMW 7 Series 750d 2020 (G11 / G12 / LCI), the most frequently mentioned issue is: Swirl flap / intake blockage. Additionally, oil leaks and oil consumption are also commonly reported.
Engine: B57
B57D30C · 750d · 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.
Swirl flap / intake blockage
Often reported
In the B57 engine, swirl flaps in the intake manifold can become clogged with carbon or break, potentially causing debris to enter the combustion chamber.
Engine Internal
Oil leaks and oil consumption
Often reported
In the B57 engine, oil leaks from gaskets and components (oil pan, valve cover, turbo oil lines) and increasing oil consumption with mileage can occur.
Engine Internal
DPF clogging
Often reported
In high-performance diesel engines (B57), the DPF can clog if the vehicle is mostly used for city driving or short trips, preventing full regeneration.
Exhaust Emissions
EGR cooler leak/failure
Often reported
In some B57 engine versions, EGR cooler leaks or failures have been reported, causing coolant to enter the intake system, leading to white smoke, rough idle, and temperature rise.
Exhaust Emissions
Turbocharger wear and failure
Often reported
The 3.0L 400 HP engine uses a complex multi-turbo system; higher complexity and operating pressures increase the likelihood of early turbo or actuator wear or failure.
Turbo
BMW 7 Serisi 750d technical specs
BMW 7 Serisi 750d (2020): boot 515 L; fuel use 6 l/100 km (urban 6,9 l/100 km · extra-urban 5,5 l/100 km); 0–100 in 4.6 s.
Boot capacity
515 L
Fuel consumption
6 l/100 km (urban 6,9 l/100 km · extra-urban 5,5 l/100 km)
What should I look for when buying a BMW 7 Series 750d?+
When buying a 2020 750d, check the service history, test drive, and engine/transmission warnings. The most commonly reported issues: Swirl flap / intake blockage; oil leaks and oil consumption; DPF clogging.
What are the common problems of the BMW 7 Series 750d?+
The most frequently reported issues: Swirl flap / intake blockage; oil leaks and oil consumption; DPF clogging.
Is the BMW 7 Series 750d reliable?+
Instead of a simple yes/no, it is necessary to evaluate 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 the Difetti fault database records; compatibility of brand, fuel, engine, and generation between the source vehicle and the target vehicle is verified. Topics with insufficient evidence are not shown.