BSI replacement C5 I Phase 2 2007 2.0 136 HDI

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NoHeal4u
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BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by NoHeal4u »

Hello there,

Last saturday, while driving over a mild bump, my C5 has shown "ESP fault" on the console. I got home with no further issues.

The day after, I started the car again and there were no issues, thus I went with it and started driving. 2km from home, after I drove over the railroad(10kmph), "ESP faulty" error popped up again, followed by "Break faulty", "Engine Faulty" and plethora of others. I returned to home straight away and turned off the car. After that I didn't manage to turn it on again, even though Ive tried multiple times(nothing happened when I tried to turn the engine on, there were multiple beeps when I gave the contact). Car got into an economy mode quite fast that day. Even when I called mechanic with the power booster, we couldn't start it. Thus I towed it to the car electric.

After inspection, car electrician said that errors are coming from the BSI unit and that BSI unit itself has to be replaced. Now, ive checked the parts market and there are dozens of used BSI's but I am not sure if they will fit or whether they can be changed so easily?

Mine unit is BSI 2004 H05-1 060207. THere are more codes on it, BOOT, HARD etc. Also there is V02 - 00 , I presume it is version.
Can I buy any working BSI with BSI 2004 H05-1 designation and V02 -00 version or there is more to it? I've noticed Peugeout 407, 307 and C4 share the same BSI, at least BSI 2004 H05-1 designation. Also, there is a plethora of BSI units from the newer C5 model(2007-2015) but even though on pictures they look the same as mine, their designation is different, so I presume those wont fit into it.

I am working in IT with computers and servers thus versioning and complexity behind it is quite familiar to me, but I know nothing about the cars sadly...

EDIT: I forgot to mention, this issue happened to me 2 and a half months ago as well, right after I bought the car, but I've managed to turn on the car from like 20-th try and I drove it to the mechanic, he said that it was not a mechanical issue and that I should go to the car electric, thus he erased the errors(without my knowledge) so I would not have an issue with ignition, but of course, when I went to the electrician he said there were no errors for him to work with thus I continued to drive the car, waiting for the issue to happen again.
wheeler
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Re: BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by wheeler »

First off im not sure if you are aware or not but if you fit a used BSI from a different car the car will not start unless you also replace the engine ECU & a working transponder chip all from the same car? Also if the used BSi has more kilometers on it your car will inherit the higher kilometres.
What makes them think the BSI is faulty? BSI failures are actually quite rare.
NoHeal4u
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Re: BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by NoHeal4u »

Electrician said he tested minor modules(ABS, ESP ... etc) first and that main source of error seems to be the BSI in the end. But as I said, I have almost no knowledge on cars, so I couldn't discuss this in more details with him last time we spoke. I started educating myself on this topic yesterday.
wheeler
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Re: BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by wheeler »

Who is the manufacturer of your BSI?
I have checked quite a few variations of the MK2 C5 & there only appears to be one part number for the BSI no matter which engine you enter suggesting that all the MK2 BSI's are the same?
Dont try to use on from a MK 3 (2008 onwards) as they are different.
NoHeal4u
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Re: BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by NoHeal4u »

It appears to be Johnson Controls .

Image Image Image
leithant
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Re: BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by leithant »

I'd be checking the BSM first.
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Paul-R
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Re: BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by Paul-R »

Those are photos of a BSM (fusebox) not a BSI aren't they?
wheeler
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Re: BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by wheeler »

Paul-R wrote:
28 Aug 2021, 08:51
Those are photos of a BSM (fusebox) not a BSI aren't they?
Nope, Definitely the BSI in the pics above.
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Paul-R
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Re: BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by Paul-R »

There's certainly a lot of variation in what BSIs look like! I can only compare it with the BSI from our 308. All metal enclosure and no fuses.
wheeler
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Re: BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by wheeler »

Ive never seen a PSA BSI thats metal or without fuses. Do you have a picture of one?
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Paul-R
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Re: BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by Paul-R »

I think I may be even more confused than usual. This is an engine ECU, not a BSI, isn't it.
IMG_20200503_131111588a.jpg
wheeler
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Re: BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by wheeler »

Yep #-o
leithant
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Re: BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by leithant »

yes, that's BSI.
NoHeal4u
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Re: BSI replacement C5 I Phase 2 2007 2.0 136 HDI

Post by NoHeal4u »

UPDATE:

Problem was solved. Although, first replacement BSI which Ive bought didnt work(it was from Peugeot 307 even though serial number was the same like my old BSI, thus hydraulics and remote locking didnt work correctly) , second BSI which was from different series but same model H05-01 worked without issues.