ECU - repair or source second hand unit?
ECU - repair or source second hand unit?
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Discussion

yeager2004

Original Poster:

275 posts

115 months

Tuesday 30th May 2017
quotequote all
After spending a lot of time unsuccessfully trying to get to the bottom of a number of issues with my 2001 Polo, I finally bit the bullet and took it to a VW specialist.

After replacing a number of parts and sensors, they came to the conclusion that the ECU is at fault. The part if apparently no longer available from VW (and even if it were, the cost would probably be prohibitive). The garage say they aren’t able (or maybe don’t want to) programme second hand units.

I’ve done a bit of investigation and there are several options:

1. Get the old one repaired. ‘ECU Doctor’ seems to receive pretty positive reviews. They charge £50 for basic diagnostic, which is refundable of you opt to go ahead with the repair, which I think was £150 + any parts. Comes with 12 month warranty.

2. Get second hand one. I found a company selling a ‘refurbished’ unit for £140 with 12 month warranty. I would have to send them my old ECU, and they transfer the data across to the ‘new’ unit.

I’m trying to decide on the best course of action – I’m inclinded torwards ECU Doctor, as hopefully this will give me a ECU that’s been repaired and thoroughly tested. The VW place did seem to think second hand ECUs could be a bit of a lottery.

Has anyone had any experiences of ECU repair or fitting second hand units?

Thanks chaps

E-bmw

12,417 posts

176 months

Tuesday 30th May 2017
quotequote all
Tough choice.

£150 + parts (if repairable) plus send it to them they then check it, they then ask you if OK to go ahead, they then repair it then you eventually get it back and get 12 month warranty.

£140 total send it to them they transfer data get a working one back with 12 month warranty.

No brainer for me.

paintman

7,852 posts

214 months

Tuesday 30th May 2017
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As the refurbed ones come with a warranty that may be the better option - certainly cheaper!

Second hand - as in 'used' off ebay etc - probably best avoided. Too much risk nowadays of being scammed.


stevieturbo

17,980 posts

271 months

Tuesday 30th May 2017
quotequote all
ECU faults are rare...but possible.

If the immobiliser is built into the ecu, this too may need programmed if you use a different unit.