"Is the 5 Serisi 520i reliable, and what should you check?"
When buying a used BMW 5 Series 520i 2024 (G60 / G61 / G90 / G99), the most frequently mentioned issue is: fragile cooling system components. Also, carbon buildup (direct injection) is commonly reported.
Engine: B48
B48B20A · 520i · Used in this car from 2024-2024
Known engine issues
Cooling systemEarly versions of this engine were equipped with short-lived cooling system pipes that often burst, but later plastic was replaced with rubber and the problem went away. Also on the forum they often complain about the short-lived water pump, radiators and coolant expansion tank cap.
Oil consumptionCompared to its predecessors, B48 units are not as prone to oil consumption, but closer to 100,000 km the valve stem seals usually harden and consumption appears. Also worth noting are regular leaks from the oil filter housing, it needs to be monitored.
Floating idleFloating idle speed or regular appearance of lean mixture errors indicate failure of the fuel tank ventilation valve. But it is inexpensive.
+2 more issues on the engine detail page
Known issues and risks
Listed from most frequently reported, each with its source.
Fragile cooling system components
Often reported
Plastic pipes, fittings, and connectors in the cooling circuit of B48 engines can become brittle over time, leading to cracks, coolant leaks, and potential overheating.
Cooling
Carbon buildup (direct injection)
Often reported
Carbon deposits can form on intake valves over time in the 2.0 direct injection engine, potentially causing poor throttle response, rough idle, and efficiency loss.
Engine Internal
VANOS/Valvetronic faults
Often reported
Reported issues with valve control systems (VANOS/Valvetronic) can cause uneven power delivery, check engine light, or performance loss at low revs.
Engine Internal
Timing chain/kit wear or noise
Often reported
Some B48 engine versions report timing system issues (chain, guides, or tensioner) causing metallic noises when cold or at low revs, check engine light, or timing irregularities.
Timing chain
BMW 5 Serisi 520i technical specs
BMW 5 Serisi 520i (2024): boot 560 L; fuel use 5,7 l/100 km (urban 7 l/100 km · extra-urban 5 l/100 km); 0–100 in 8.3 s.
Boot capacity
560 L
Fuel consumption
5,7 l/100 km (urban 7 l/100 km · extra-urban 5 l/100 km)
What should I look for when buying a BMW 5 Series 520i?+
When buying a 2024 model 520i, check the service history, test drive, and look for engine/transmission warnings. The most commonly reported issues are: fragile cooling system components; carbon buildup (direct injection); VANOS/Valvetronic faults.
What are the common problems of the BMW 5 Series 520i?+
The most frequently reported issues are: fragile cooling system components; carbon buildup (direct injection); VANOS/Valvetronic faults.
Is the BMW 5 Series 520i reliable?+
Instead of a simple yes/no, it's necessary to evaluate 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 records; brand, fuel, engine, and generation compatibility between the source vehicle and the target vehicle is verified. Topics with insufficient evidence are not shown.