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PN: 1587010536 · Bosch
Fuel pump check valve that maintains residual pressure in the fuel system when the engine is off, facilitating quick starts.
Replace upon failure or along with the fuel pump (approx. 100,000 - 150,000 km).
Hard starting when cold or after prolonged rest, loss of fuel pressure, long cranking times.
Premature starter motor wear, battery drain, additional strain on the fuel pump.