"Is the 5 Serisi 520d reliable, and what should you check?"
When buying a used BMW 5 Series 520d 2021 (G30/G31/F90 LCI), the most frequently mentioned issue is vibration during braking (discs/pads). Carbon buildup in the EGR/EGR cooler is also commonly reported.
Engine: B47
B47D20B · 520d · Used in this car from 2018-2024
Known engine issues
EGR valveMost problems of this engine are related to the EGR system, called AGR here. In early years, the valve could clog at 30,000 km and a recall campaign was even conducted. When it sticks open, overheating causes the intake manifold to crack.
Intake cloggingThe second most frequent service issue is clogging of the intake manifold and ports in the cylinder head, leading to loss of power and unstable engine operation. In severe cases, the intake swirl flaps may stick and break off.
Timing chain stretchThe chain timing drive on B-series engines differs little from N-series predecessors and may require attention before 200,000 km under very active use. There is already a cost-effective procedure to replace these chains without removing the engine.
+1 more issues on the engine detail page
Known issues and risks
Listed from most frequently reported, each with its source.
Vibration during braking (discs/pads)
Often reported
Several owners of the Serie 5 G30 520d 190 HP report vibration in the cabin during braking. These vibrations can reappear even after disc and pad replacement.
Brakes
Carbon buildup in EGR/EGR cooler
Often reported
Carbon buildup in the EGR valve and intake ports is reported on the 2.0 diesel B47 190 HP engine. This can cause idle fluctuation, loss of throttle response, warning lights, and in advanced cases, heat exchanger failure.
Engine Bay
Timing chain wear/stretch (B47)
Often reported
Although the B47 engine family has fewer issues compared to the previous N47, starting noises, 'rattling' sounds, and timing chain stretch or tensioner wear are reported, especially on high-mileage or poorly maintained vehicles.
Timing chain
DPF clogging and sensor issues
Often reported
Frequently incomplete DPF regenerations, especially in city or short-distance driving, lead to warning lights, performance loss, and sensor failures.
Exhaust Emissions
Turbo/wastegate issues
Often reported
Reported faults in the turbocharger or wastegate actuator include whistling noise, boost loss, torque drop, or unusual sounds during acceleration.
Turbo
BMW 5 Serisi 520d technical specs
BMW 5 Serisi 520d (2021): boot 530 L; fuel use 4,5 l/100 km (urban 5,2 l/100 km · extra-urban 4,1 l/100 km); 0–100 in 7.2 s.
Boot capacity
530 L
Fuel consumption
4,5 l/100 km (urban 5,2 l/100 km · extra-urban 4,1 l/100 km)
What should I look for when buying a BMW 5 Series 520d?+
When buying a 2021 520d, check the service history, test drive, and look for engine/transmission warnings. The most commonly reported issues are: vibration during braking (discs/pads); carbon buildup in the EGR/EGR cooler; timing chain wear/stretch (B47).
What are the common problems of the BMW 5 Series 520d?+
The most frequently reported issues are: vibration during braking (discs/pads); carbon buildup in the EGR/EGR cooler; timing chain wear/stretch (B47).
Is the BMW 5 Series 520d reliable?+
Rather than a simple yes/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 the Difetti fault database; brand, fuel, engine, and generation compatibility between the source vehicle and target vehicle are verified. Topics with insufficient evidence are not shown.