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N55 Engine
Fuel Pressure Sensor
The fuel is supplied at a primary pressure of 5 bar by the electric fuel pump from the fuel
tank via the supply line to the high pressure pump. The primary pressure is monitored by
the fuel pressure sensor (5). The fuel is delivered by the electric fuel pump correspond-
ing to engine requirements. The fuel pressure sensor known from the N54 and N63 is
used.
In the event of the fuel pressure sensor failing, the electric fuel pump continues operation
at 100% delivery rate as from terminal 15 ON.
N55 Engine
Index Explanation Index Explanation
1
Non-return valve for brake booster
6
Fuel supply line
2
Non-return valve for auxiliary consumers
7
Oil pressure sensor
3
Knock sensor
8
Quantity control valve
4
Connection, high pressure line to fuel rail
9
High pressure pump
5
Fuel pressure sensor
10
Vacuum pump
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