Engine: 850 T5/R - ECU swap…easily done??

Pupbelly · Oct 15th, 2021, 16:31

Is swapping an ECU a simple plug and play task? I’m talking about a 1995 T5R here as I have the opportunity to purchase a remapped ECU, so do you just unhook the ECU after undoing the retaining “handle”?

Thanks in advance
Mark

rudi dudi · Oct 15th, 2021, 21:22

Yup plug and play... the beauty of the pre coded era.

Pupbelly · Oct 16th, 2021, 08:03

I’ve read somewhere about security shear bolts, or is that just on V70’s (post ‘97 cars?)

RollingThunder · Oct 16th, 2021, 08:49

Yes, there is a retaining/securing bracket that goes over the ECU housing - that is secured with a shear bolt. It is (usually) easily removed with some locking mole grips

You can buy another shear bolt, but most people just fit a normal bolt afterwards - the only 'downside' is that it is evident that someone has accessed the ECU housing - so if you have an accident the investigator will be tipped off that the ECU may have been remapped. So you'll need to make sure that you have notified your insurer before fitting the remapped ECU.

NB I am in the same situation - I have a RICA mapped ECU which I will be fitting soon. I just want to finish my stage 0 prep before fitting it.

Pupbelly · Oct 16th, 2021, 17:05

Thanks Rolling Thunder, likewise it’s something I intend to do once I’ve got the car to where I want it, just sanity checking what’s what with an ECU swap. I look forward to your write up

Oct 15th, 2021, 16:31	#1
Pupbelly Member Last Online: Jan 26th, 2023 13:31 Join Date: Jan 2019 Location: Maidstone, Kent (But Yorkshire born & bred)	ECU swap…easily done?? Is swapping an ECU a simple plug and play task? I’m talking about a 1995 T5R here as I have the opportunity to purchase a remapped ECU, so do you just unhook the ECU after undoing the retaining “handle”? Thanks in advance Mark

Oct 16th, 2021, 08:49	#4
RollingThunder Grumpy Old Git Last Online: Apr 19th, 2024 09:16 Join Date: Dec 2004 Location: South Yorkshire View Photos By: RollingThunder	Yes, there is a retaining/securing bracket that goes over the ECU housing - that is secured with a shear bolt. It is (usually) easily removed with some locking mole grips You can buy another shear bolt, but most people just fit a normal bolt afterwards - the only 'downside' is that it is evident that someone has accessed the ECU housing - so if you have an accident the investigator will be tipped off that the ECU may have been remapped. So you'll need to make sure that you have notified your insurer before fitting the remapped ECU. NB I am in the same situation - I have a RICA mapped ECU which I will be fitting soon. I just want to finish my stage 0 prep before fitting it. __________________ S40 2.4i '07 Japanese import '96 850R - https://www.volvoforums.org.uk/showthread.php?t=312484 Ex Danish Embassy '96 940 GLE LPT - https://www.volvoforums.org.uk/showthread.php?t=326071

Oct 15th, 2021, 21:22	#2
rudi dudi DPF free.FCUK Greta he he Last Online: Mar 28th, 2024 13:38 Join Date: Jun 2012 Location: Bristol	Yup plug and play... the beauty of the pre coded era.

Oct 16th, 2021, 08:03	#3
Pupbelly Member Last Online: Jan 26th, 2023 13:31 Join Date: Jan 2019 Location: Maidstone, Kent (But Yorkshire born & bred)	I’ve read somewhere about security shear bolts, or is that just on V70’s (post ‘97 cars?)

Oct 16th, 2021, 17:05	#5
Pupbelly Member Last Online: Jan 26th, 2023 13:31 Join Date: Jan 2019 Location: Maidstone, Kent (But Yorkshire born & bred)	Thanks Rolling Thunder, likewise it’s something I intend to do once I’ve got the car to where I want it, just sanity checking what’s what with an ECU swap. I look forward to your write up

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