vinkodex.S55: connecting rod bearings that wear early
Typically above 60,000 km. It does not show up on every car.
expensive
severity
above 60,000 km
mileage
2
sources
2 sources next to the write-up.
The fault
How you spot it
The connecting rod bearings wear from as little as 60,000 kilometres, which is early even for an engine of this output. The debris shows up as metal particles in the oil.
The symptoms are knocking from the engine block, a metallic sheen in the oil and the oil pressure warning light. If a bearing runs, the crankshaft is damaged too and the repair is an engine rebuild. The bearing shell size and clearance are the same on the N54 and the N55, with the same factory part numbers. The S55, however, manages the oil pressure better, so the trouble is rarer on it than on its smaller siblings.
Which model
Who it affects
The card opens the generation, the engine or the transmission.
Engines and transmissions
Engine
S55B30
vinkodex.Checklist
S55: connecting rod bearings that wear early
What you would check for this fault. Take it to the car.
Before you buy
Checklist
What you tick stays on this device only.
Sources
How we know
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Information, not an expert opinion
We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.
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