Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car

Audi 80/Avant
+ Technical specification
+ Engines
+ System of production of the fulfilled gases
+ Cooling system
- Fuel tank and fuel pump
   Fuel tank
   Fuel level sensor
   Fuel accumulator
   Fuel-supply line
   Fuel pump
   Replacement of the fuel filter
+ Air filter and airintaking channels
+ System of injection
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications

Fuel level sensor

The protective flange of a fuel tank located under the bottom of a luggage compartment

1 – the bringing pipeline to system of injection;
2 – a drain fuel-supply line from system of injection (shooters point to fixing plates for removal of this fuel-supply line);

3 — the plug of the fuel pump and the fuel sensor.

It is shown on the example of the 5-cylinder engine:

1 – the pipeline to a tank with absorbent carbon;
2 – electromagnetic valve;
3 – a fuel-supply line to the case of throttle knot.

The arrow indicates the electromagnetic valve of a tank with absorbent carbon of model with the 6-cylinder engine.

The tank with absorbent carbon is located behind in the right forward wheel niche (on an illustration it is shown at the removed flap).

Provision of installation of a protective flange: the arrow on a flange (1) has to be opposite to a mark in a fuel tank (2).

On an illustration the removed protective flange is shown (1):

2 – electric wire of the fuel pump;
3 – wire of the sensor of the indicator of amount of fuel;
4 – the drain pipeline in a fuel tank;
5 – the fuel accumulator (only in models with the 5-cylinder engine and system of injection of KE-III-Jetrolic).

The settler represented here is usually pasted in a fuel tank; on an illustration it is shown for the best presentation separately. Removal of the fuel sensor (1) possibly after pressing of the button (shooter). Thus there is an unblocking. The sensor can be extended now.

The fuel sensor is installed from above in the case of the toplivozabornik located inside in the middle of a fuel tank. You will find the description of a way of its action in the head Pribory and auxiliary devices.

By the way, depending on various forms of a fuel tank there are various fuel sensors for front-wheel and all-wheel drive models. Distinction sign: the sensor with a rectangular float – front-wheel model, with a spherical float – all-wheel drive model.

 Help: the indicator of level of gasoline is not the high-precision device. Incorrectly showing sensor can be corrected regulation of the indicator on a control panel (the head Pribory and auxiliary devices).

Removal of the fuel sensor

 Important: the fuel tank has to be filled a maximum to 2/3, differently fuel will pour out!


  1. To turn off aside a rug of a luggage compartment.
  2. To turn off a black protective cover.
  3. To remove the multicontact plug.
  4. To squeeze fixing plates on a connector of a drain fuel-supply line and to remove a fuel-supply line.
  5. To turn off a fuel supply fuel-supply line.
  6. To turn off a plastic cap nut. Most often it sits very tight. Therefore it is necessary to put perhaps more stupid screw-driver to one of nut edges and to weaken a nut in easy blows of a hammer to a handle core. If necessary to apply on other sides.
  7. Now it is possible to raise a protective flange a little.
  8. If it is necessary, to squeeze fixing plates of a drain fuel-supply line on flange inside (as it was already made outside) and to extend it in the direction down.
  9. Now to lower a hand in a fuel tank and to pull out the sensor from the case of a toplivozabornik, at the same time pressing "doggie".
  10. To disconnect the plug of the fuel sensor on a protective flange.
  11. Before installation to moisten a sealing ring of a protective flange with fuel.
  12. Provision of installation of a protective flange: the arrow on a flange has to be opposite to a mark in a fuel tank.