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 Post subject: Retro fit rear sensors
PostPosted: Tue May 12, 2020 7:12 am 
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Joined: Wed Jan 09, 2013 10:00 pm
Posts: 13
Car Models: 9-3 1.8t saloon
Morning all, I’m looking at a nice low mile NG 93 Aero auto (don’t know if the auto will have a bearing) that hasn’t got factory for rear sensors. If I’m able to source a bumper with the sensors how easy is it to link it up? Will it just be a case of wiring up? Will it need Tech2 to sort - it’s for the dead basic sound system, so don’t know if that’s going to be an issue.

I don’t really know what I’m talking about so laymen’s terms please guys.

Or do I just hold out to fine one with them installed?

I’m so picky I’ve missed out on two sound motors.....I need to be less picky!

Cheers.


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PostPosted: Tue May 12, 2020 7:33 am 
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Joined: Mon Feb 19, 2007 4:12 pm
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Location: Portsmouth
Car Models: 96 V4 & 9-3 Turbo-X
You'll need a bumper with sensors and loom, and the parking assist module which sits behind the carpet in the boot.

Might be plug and play (it was on my OG9-3 when I fitted the sensors from a 9-5), or it might need coding to the car. The Auto and the basic sound system have no impact on it.

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PostPosted: Sat Jun 27, 2020 9:14 pm 
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Location: Queenborough, Kent
Car Models: 9k, 9-5 Aero & a Jaaag
The other option is to get an aftermarket setup, these generally just need a 12V supply from the reversing light. I fitted one to my 9-5 estate, the complete unit (from Amazon) with sensors was less than £20. Downside is you need to fit it yourself but the kit comes with a hole saw - and there should be suitable spaces on the bumper shell for the sensors if the car could come with them from the factory. Downside being you won't be able to interrogate the system with tech2, but again - for £20, you could buy two kits and keep one for spares ...

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PostPosted: Sat Jun 27, 2020 9:22 pm 
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Joined: Wed Apr 16, 2014 12:26 pm
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Location: South Oxfordshire
Car Models: 2008 9-3ss Aero 2.0T; 1971 VW Beetle 1300; 2013 VW Shuttle (T5) WAV
beardydave wrote:
You'll need a bumper with sensors and loom, and the parking assist module which sits behind the carpet in the boot.

Might be plug and play (it was on my OG9-3 when I fitted the sensors from a 9-5), or it might need coding to the car. The Auto and the basic sound system have no impact on it.
It needs coding with Tech II. I did it for someone last year, they had wired everything up and approx 3 mins on the Tech II got it working.

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PostPosted: Mon Jun 29, 2020 1:40 pm 
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sounds wrote:
The other option is to get an aftermarket setup, ..... for £20, you could buy two kits and keep one for spares ...

I bought one for our C3 for about £9 on eBay. Surprisingly effective, and has visual as well as audible signal. Doddle to fit, too.

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PostPosted: Mon Jun 29, 2020 7:37 pm 
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Joined: Sun Apr 03, 2016 11:56 pm
Posts: 396
Car Models: SAAB 95 AERO HOT AUTO ESTATE
Easy enough to retro fit, if you have all the donor bits. Depending on the age of the car, If it has a black strip in the bumper, this needs to be replaced with the parking assist version, later cars you need to replace the bumper.

All pre 2007 sensors and looms are the same, but the estate has different mounts to hold the sensors in place.

Use the parking assist control unit, connect the bumper loom and the green and red/orange wire from the control unit(if my memory serves me right) into the blue multipug in the boot fusebox (I think they go in slot 1 & 4). Earth the black wire to the shell.

On prefacelift cars there is no need to remove the bumper, i used curtain wire and hooked it through the end sensor

You will need Tech2 to inform the car you have fitted the sensors and then turn the system on in the SID

I hope this helps


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