Cooling system components (water pump/plastic parts)
Often reportedPlastic components in the cooling circuit (thermostat housing, pipes, pump impeller) may degrade over time, causing leaks, temperature warnings, and rarely overheating.
Cooling
When buying a used BMW 5 Series 520i 2023 (G60/G61/G90/G99), the most frequently mentioned issue is: Cooling system components (water pump/plastic parts). Also, timing chain/tensioner wear is commonly reported.
Engine varies by trim; verify the engine code on the listing.
Listed from most frequently reported, each with its source.
Plastic components in the cooling circuit (thermostat housing, pipes, pump impeller) may degrade over time, causing leaks, temperature warnings, and rarely overheating.
Cooling
In some B48 family examples, vibration or metallic noise (rattling) when cold is reported. This may be related to wear or abnormality of the timing system (chain/tensioner/guides). Low-speed noises, warning lights, or timing irregularities may occur.
Timing chain
Some users with B48 engines report rattling or clicking noises from the wastegate, along with unresponsiveness or limp mode due to turbo issues.
Turbo
Same trim, different year
We only publish claims we can verify. Cards come from Difetti fault records matched to this vehicle on brand, fuel, engine and generation.