BMW 3 Series E46

since 1998 release

Repair and operation of the car

BMW 3 Series E46
+ BMW 3 cars (E46)
+ Current leaving and service
+ Engine
+ Cooling systems, heating
- Power supply systems, injection and release
   Security measures and rules of respect for purity during the work with fuel system
   Removal and installation of the sensor of a reserve of fuel / fuel pump
   Check of the sensor of a reserve of fuel
   + Power supply system of petrol engines
   + System of injection of fuel of the petrol engine
   + Power supply system of diesel engines
   + System of production of the fulfilled gases
+ Engine electric equipment
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment

Check of the sensor of a reserve of fuel

In the course of decrease in level of fuel in a tank also the float in the stock sensor falls. At the same time resistance of the sensor having the sliding contact at the same time decreases. The microprocessor in the dashboard block proceeding from resistance of the sensor and other data calculates fuel level in a tank and brings data to the dashboard. Both sensors are checked equally.

The fuel pump in the right sensor of a stock can be checked only for HUNDRED.


1 Remove the sensor.
2 Attach an ohmmeter to stock sensor plug plugs.
3 You keep the sensor in working situation. At the same time the float is below and the indicator on the panel shows "A fuel reserve". The required value of resistance: 70 ± 2 Ohms.
4 Turn the sensor on a corner 180 ° (put it on the head), at the same time the float is above. The indicator on the panel shows "full".

The required value:
right sensor 402 ± 6 Ohms
left sensor 362 ± 6 Ohms
5 If necessary replace the damaged stock sensor in a set.

Sensors are delivered only in a set, separate details cannot be replaced.