The fuel pressure regulator can leak and cause a hard start condition, without any faults recorded in the engine computer.
Car problem reports
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Most reported Volvo S40 problems
The right front engine mount wears out prematurely, causing engine vibration at idle.
The engine may not start due to a failed starter control module. If the module has indeed failed, it will require replacement.
There have been reports of premature rear brake pad wear. Our technicians recommend to inspect brake pads at each tire rotation interval.