Ford Bosch EDC 16C3 Engine ECU Repairs

Type: Bosch Engine Management
Fits: Ford
Engines:
Year:
Fuel: Diesel
Ref: ECUT66300

Note: This ECU may also fit other models.

The first four characters of the Ford number on a Bosch EDC16C3 label, 3M51 or 4M61 for example, are the quickest way into the table on this page. For seven of its eight rows, that prefix lines up with the car the unit is on record from, including two rows on record from Mazda cars.

Each prefix is matched to its vehicle below, followed by what to copy from the label and how the repair is handled once the unit reaches our workshop.

Which car each Ford prefix points to

Every Ford number in the table carries 12A650 in its middle, so that part cannot pick a row. The prefix in front of it usually can.

3M51 opens two rows. Bosch 0281 011 263 (3M51-12A650-MD) and 0281 011 533 (3M51-12A650-HD) are both on record from the Ford Focus and C-Max 1.6 TDCi, so for these two the letters after 12A650, MD or HD, make the final call.

4M51 appears once, on 0281 011 801, which is on record from the Focus. 7M51 also leads to the Focus, on 0281 012 487, and that unit is on record with the 1.6 TDCi. 5S61 is also found on a single row, 0281 012 249, on record from the Fiesta 1.6 TDCi.

That leaves 3M61 and 4M61, the two Mazda rows. The 61 alone is no sign of a Mazda, since 5S61 belongs to the Fiesta row above; it is the whole four characters that count.

Ford numbers on the Mazda units

Bosch 0281 011 534 carries 3M61-12A650-AC, and 0281 011 952 carries 4M61-12A650-BC. Both are on record from Mazda cars, and the label carries a Ford-style number even on the Mazda.

Our record for 0281 011 534 includes a 1.6 engine. For 0281 011 952 we hold the marque and nothing further, so this page names no model or engine size against it.

If your unit came out of a Mazda, there is no Mazda-format number to hunt for in our table. Match it on the Ford number and the Bosch number, as you would for a Focus.

When a unit is sold under the EDC16C34 name

Some of the Ford 1.6 TDCi units in this table are listed as EDC16C34 by the people selling them. Go by the Bosch number on the unit’s label rather than the family name in a listing: if the ten digits beginning 0281 match a row below, this page covers your unit.

If the number is not in the table and your unit is sold or described as an EDC16C34, the Ford units we list under EDC16C34 have a page of their own.

0281 017 968 and the 5U71 prefix

5U71 is the one prefix in the table we cannot tie to a vehicle. We hold too little on record for 0281 017 968 to name a car, so the match rests on the two numbers alone: 0281 017 968 on the Bosch side and 5U71-12A650-CA on the Ford side.

Check both against the label before sending; with no car on record, they are all that ties a unit to this row.

What to copy from the label

Copy the Ford number exactly as it is printed, letters after 12A650 included. Six of the eight rows in our table also show a four-character code after the Ford number, such as 1HAD after 3M51-12A650-MD, and some labels carry that code too. If yours does, send it.

Add the full Bosch number, all ten digits from 0281, and the car the unit came out of. For a Ford unit that is not listed below, start from Ford engine ECUs outside the EDC16C3 name.

How the repair works once the unit arrives

Owners and garages across the UK post their units to our workshop. Each unit is logged, inspected and electrically tested, then taken through diagnostics for the fault it arrived with, all by our own engineers on our own equipment.

Faulty components are found and renewed on the board under a microscope, with temperature-controlled rework equipment, and the unit is not finished until it passes final testing.

We contact you with what testing found before any chargeable work begins, and nothing goes ahead without your agreement. The unit returned to you is the one you sent, with a 24-month warranty on the repair carried out.

To begin, put both numbers from the label on the Repair Form. Units from any other make start where our engine ECU repairs begin.

The eight rows on this page follow, each with its Bosch number and the Ford number printed with it.

Common part numbers associated with this type of unit