VW / Audi / Seat / Skoda (VAG) Bosch MP4.1 Engine ECU Repairs

Type: Bosch Engine Management
Fits: VAG – Audi / Seat / Skoda / Volkswagen (VW)
Fuel: Petrol
Ref: ECUT202195

Note: This ECU may also fit other models.

A Volkswagen T4 with a failed engine control unit is a van off the road, and for a trade or fleet owner the useful question is how quickly the right unit can be identified, repaired and returned. This page covers two Bosch MP4.1 references, both recorded against the T4 with the 2.0 petrol engine.

Only the control unit has to travel, and getting that journey right first time is what most of this page is about.

Which vans these MP4.1 units come out of

Independent records for both references agree on the vehicle: the Volkswagen T4 Transporter with the 2.0 petrol engine. That applies to Bosch 0 261 200 340 and to Bosch 0 261 203 334 alike.

Nothing wider than that has enough support to print. No other model and no other engine size has the backing of two independent sources for either reference, so none is named. If your unit came out of a different vehicle, compare its label with the next section before drawing any conclusion.

The spec lines at the top name Audi, Seat and Skoda because this page is filed with our other VAG references. The outside record for these two units is narrower. It places them in the T4 only, and no Audi, Seat or Skoda application is recorded by more than one source.

Matching the label to 0 261 200 340 or 0 261 203 334

Sellers list these units under two numbers: the ten-digit Bosch reference and a Volkswagen part number. Both appear on the case label, and the Volkswagen number is not complete without the letter at its end.

Bosch 0 261 203 334 pairs with Volkswagen 044 906 022 M. Our table carries that pair, and it matches what outside listings print for the unit.

Listings for Bosch 0 261 200 340 carry Volkswagen 044 906 022 E beside it.

The two Volkswagen numbers share the 044 906 022 stem, so the final letter is the character to check twice: E belongs with 0 261 200 340 and M with 0 261 203 334.

A label that pairs one of these Bosch numbers with some other Volkswagen number needs checking rather than guessing. Our engineers can confirm coverage for that specific unit once they have the full label.

If the case is from a Volkswagen but carries neither Bosch number, look through the Volkswagen engine ECU part numbers we list. For a unit from any other make, the main engine ECU repairs page is the better starting point.

Getting the unit to us while the van stays put

We work by post, covering the whole of the UK, so the T4 does not have to be delivered anywhere. The control unit is removed and posted to our workshop, and the van waits at the yard, the garage or the driveway where it stopped.

The more of the unit’s identity travels with it, the less has to be worked out on arrival. Before it leaves, note three things: the Bosch number, the Volkswagen number with its final letter, and the fault the van showed.

Mention that it came from a T4 2.0 petrol as well. It gives our engineers the vehicle to set against the record for these two references.

Bench repair and the 24-month warranty

Each MP4.1 is logged when it reaches the workshop. An engineer examines the case and board, runs electrical tests, and only then moves on to diagnosis aimed at the fault you reported.

All of it happens in our own UK workshop, on our own equipment, in the hands of our own engineers. Soldering and component replacement are done at the microscope with temperature-controlled rework stations.

We trace the fault to the component that has failed and repair it on the board, so the van gets its own control unit back rather than a substitute.

Diagnosis ends with us reporting back to you: what was found, and the repair it needs. The work proceeds only with your say-so. Final testing comes last, before the unit is returned, and the repair is covered by a 24-month warranty.

With the label read and the fault noted, request a bench test for the unit through our Repair Form.

Our table of MP4.1 references follows.

Common part numbers associated with this type of unit