VW / Audi / Seat / Skoda (VAG) Siemens Simos PPD1.1 Engine ECU Repairs

Type: Siemens
Fits: VAG – Audi / Seat / Skoda / Volkswagen (VW)
Fuel: Diesel
Ref: ECUT235250

Note: This ECU may also fit other models.

The spec lines at the head of this page describe the unit in broad strokes: a Siemens engine ECU, for the VAG group, running on diesel. The record behind its one part number is far narrower. It places 03G 906 018 in a single car, the Volkswagen Passat 2.0 TDI of the B6 generation with the BKP engine, and that narrowness is what makes a Simos PPD1.1 quick to confirm before you send it to us for repair.

From the VAG group to one Passat: what this Simos PPD1.1 fits

Read the header lines in order, then add what the record says. Type names the maker as Siemens. Many of these units carry the Siemens VDO name on the case instead, so either name on the label is consistent with this page.

Fits names the whole VAG group: Audi, Seat, Skoda and Volkswagen. The part number is more specific. The record behind 03G 906 018 names one Volkswagen, the B6 Passat 2.0 TDI, and no Audi, Seat or Skoda is listed against it.

Fuel reads Diesel, and the engine bears that out: a 2.0 TDI PD, engine code BKP.

Put together, the unit on this page is the engine ECU from a B6 Passat 2.0 TDI PD with the BKP engine. If your car has a different engine code, or is a different model, the record here does not cover its engine ECU, so ask us before anything is posted.

Reading 03G 906 018 on the label

The Volkswagen reference to look for is 03G 906 018, and on this unit it stops there. Nothing follows the final 018. That is the complete reference rather than a shortened one, so write it down exactly as it reads.

Other references begin with the same 03G 906 018 and carry a suffix after it. Those are different units, and they are not covered here. If your label shows a letter after 018, or a different reference altogether, look among this unit’s Volkswagen stablemates instead.

When the two sides agree, 03G 906 018 on the case and the right Passat on the driveway, you have the unit this page describes.

How we repair a Siemens Simos PPD1.1

We repair diesel engine ECUs in-house, this one included: our own engineers, in our own UK workshop, on our own equipment. None of the work is sent out to anyone else.

Each PPD1.1 is logged on arrival and inspected by eye, then tested electrically before diagnostics aimed at the fault it came in with. The repair itself is carried out at component level under a microscope, using temperature-controlled rework equipment. The unit is not passed as repaired until it clears final testing.

Because the fault is repaired on your own unit rather than the unit being exchanged, the ECU that goes back into the Passat is the one that came out of it. We contact you with the diagnosis and a quote first, and no chargeable work starts until you authorise it. The repair is covered by a 24-month warranty.

Sending a Simos PPD1.1 in from your Passat

We work entirely by post, so the unit can reach us from anywhere in the UK. The first step is the Repair Form. Give us the full reference from the label, the car and its engine code, then register the unit before you post it.

If the engine ECU you are holding came from another make, start at our engine ECU repair landing page.

The reference appears in the table below.

Common part numbers associated with this type of unit