The air flow meter in the VW T3 WBX engine sends a voltage value to the Engine Control Unit (ECU) based on the amount of air currently being used. The ECU uses this information to regulate the injection values ​​for the engine.

As most buses have already done over 200,000 km and the original air flow meter mechanically reads this value from a circuit board and this is subject to wear, such an engine no longer runs as smooth as it did originally. The conductor tracks are worn through in certain areas (the most frequently used ones). This gives the control unit an incorrect value and therefore regulates incorrectly - poor engine performance until it comes to a shut down.

In addition, this original, mechanical solution occasionally has a so-called impedance problem. To get rid of this problem, VW installed an intermediate plug with electronics in it from a certain model year. This impedance problem can no longer occur with this contactless hall solution; converting to this system therefore kills two birds with one stone.

The offer includes the following:
- opening the AFM (black cover)
- removing the circuit board and the contact gripper
- installing the contactless system
- programming the hall chip directly inside the AFM
- measuring the voltage output
- basic setting of the bypass CO screw on the AFM outlet
- measuring the voltage output at a defined air flow (2 levels) and adjusting the flap spring (tension may also decrease after 30+ years)
- casting the electronics and securing the screws
- gluing the black cover
- return shipping

IMPORTANT POINTS:
- If your AFM has a mechanical defect (damaged flap is difficult to move or is stuck), please mention this in advance so that there are no surprises.
- For an optimal result, it is recommended to have the AFM correctly adjusted in an exhaust gas test as soon as possible (especially with the DJ, as they do not adjust based on the exhaust gas values).

The conversion takes 1-3 working days plus shipping. Since we are in Switzerland, shipping takes a little longer. However, it can usually be solved via a German/EU delivery address.

Of course, you will get all the old parts back.

The conversion can be carried out for all AFMs that are operated via 5V! This includes all 2.1l WBX (Engine codes DJ, MV, SS, SR) from the T3 as well as the direct injection of the 1.9l WBX (Engine codes DH and GW).

In addition, equivalent AFMs, which can also be converted, were installed in the following vehicles:
- Porsche: 911, 944
- Volvo: 360
- Audi 80 2.0 (91-96)
- Audi 100 2.0 (90-94)
- Audi Coupé 2.0 (89-96)
- Audi A6 2.0 (94-97)
- Audi Cabriolet (93-98)
- Seat Cordoba 1.8i 16V (93-96)
- Seat Toledi I 2.0i (91-99)
- Seat Ibiza II 1.8i 16V (93-96)
- VW Passat 35i 2.0 (90-96)
- VW Golf III 2.0 (91-98)
- VW Jetta MK2 1.8 (84-92)

- VW Golf II 1.3 (87-92)

- VW Jetta 1.3 (87-92)

- VW Polo 1.3 (86-94)

- VW Vento 2.0 (91-98)

- VW Corrado 2.0i (93-95)

- Opel Rekord E1 2.0 (77-84)

- Opel Senator A 2.0 (83-84)

- Opel Manta B 2.0 (77-88)

- Opel Monza A 2.0 (83-84)

- BMW 325i(x) E30 2.5 (86-93)

- BMW 325i E36 2.5 (90-95)

- BMW 525i E34 2.5 (88-90)

- BMW Z1 Roadster 2.5 (88-91)

Article number extract (not exhaustive):

Bosch: 0280202130, 0280202030, 0280202079, 0280202082, 0280200048, 0280200049, 0986280030, 0986280010
VW: 037906301C, 037906301CX, 025906301C, 030906301
BMW: 1286615, 13621286615, 13627547977