"Is the 5 Serisi 540i reliable, and what should you check?"
When buying a used BMW 5 Series 540i 2017 (G30/G31/F90), the most frequently mentioned issue is cooling system leaks and failures (water pump). Oil leaks from the valve cover and filter housing are also commonly reported.
Engine: B58
B58B30C · 540i · Used in this car from 2017-2023
Known engine issues
Crankcase ventilationFirst-generation units had a short-lived crankcase ventilation valve, whose membrane wore out quickly, causing white smoke from the exhaust. Later the PCV design was revised and this problem became less common.
Oil pumpSecond-generation B58TU engines were equipped with a problematic version of the oil pump with a plastic adjustment ring that could crack even at low mileage. Then oil pressure dropped and a corresponding error appeared on the dashboard.
Coolant leaksThe most common cause of B58 engine failure is low coolant level, so it is extremely important to monitor leaks and replace the coolant reservoir cap every two years. If a coolant level error appears, you must go on a tow truck.
+1 more issues on the engine detail page
Known issues and risks
Listed from most frequently reported, each with its source.
Cooling system leaks and failures (water pump)
Often reported
Issues can develop in the cooling circuit: electric water pumps, thermostats, and plastic components may fail or leak over time.
Cooling
Oil leaks from valve cover and filter housing
Often reported
Oil leaks may occur at the valve cover, oil filter housing, and related gaskets. Plastic parts and gaskets can deform over time due to heat, leading to oil leaks or burning smell; if neglected, low oil level may occur.
Engine Bay
Carbon buildup on valves due to direct injection
Often reported
In direct injection engines, carbon deposits can form on intake valves and ports over time; this can cause delayed throttle response, occasional misfires, and rough idle.
Engine Internal
PCV system / integrated valve cover failures
Often reported
In many B58 variants, the crankcase ventilation (PCV) system is integrated into the valve cover. Failure can cause abnormal oil consumption, blue smoke from exhaust, deposits, and reduced performance. Since the PCV valve is often embedded, its failure may require replacing the entire valve cover.
Engine Internal
Turbocharger noise/failure (wastegate/actuator)
Often reported
Some users report metallic noises, vibrations, or loss of smooth power delivery due to the wastegate or turbo actuator. Symptoms include power loss, erratic boost pressure, and sometimes smoke.
Turbo
BMW 5 Serisi 540i technical specs
BMW 5 Serisi 540i (2017): boot 570 L; fuel use 7,7 l/100 km (urban 9,9 l/100 km · extra-urban 6,5 l/100 km); 0–100 in 5.1 s.
Boot capacity
570 L
Fuel consumption
7,7 l/100 km (urban 9,9 l/100 km · extra-urban 6,5 l/100 km)
What should I look for when buying a BMW 5 Series 540i?+
When buying a 2017 540i, check the service history, perform a test drive, and look for engine/transmission warnings. The most commonly reported issues are: cooling system leaks and failures (water pump); oil leaks from the valve cover and filter housing; carbon buildup on valves due to direct injection.
What are the chronic problems of the BMW 5 Series 540i?+
The most commonly reported issues are: cooling system leaks and failures (water pump); oil leaks from the valve cover and filter housing; carbon buildup on valves due to direct injection.
Is the BMW 5 Series 540i reliable?+
Rather than a simple yes/no, it's 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; compatibility between the source vehicle and target vehicle is verified by brand, fuel type, engine, and generation. Topics with insufficient evidence are not shown.