Z4 retro fit heated seats.

t-tony

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The addition of heated seats makes the car more usable as the weather gets colder though Ken.

Tony.
 

Bigwinn

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No dramas

shout if you change your mind I’d be happy to share best practices
 

Bigwinn

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Plus I see basic heated and electric seats fairly cheap over on z4 forum- there was a black pair in good nick for £100?

I was surprised that seats were cheap and the control panel was comparatively expensive!
 

t-tony

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I know a man who could re colour those without much problem, .......... after he's done mine :thumbsup::)

Tony.
 

Z Victor 1

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Wow, when I was looking on Ebay they were between £500 - £900 plus £100 for the switch panel. I'm not on Z4 Forum so never looked on there.
 

Bigwinn

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Wow, when I was looking on Ebay they were between £500 - £900 plus £100 for the switch panel. I'm not on Z4 Forum so never looked on there.
To be fair you’d pay that for a good set of m seats- they are rare and expensive

but standard leathers- much cheaper
 

Z Victor 1

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Looked at those on Z4 @Bigwinn, but it doesn't look like they are heated. I'll keep looking and I've put a wanted ad over on Z4. I'm not in a rush, hoping we have some warm weather soon !
 

colb

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Z3 M43 1.8 (1999) and Z4 E85 2.5 (2003)
Not just today but the last three days on installing aftermarket heated seat pads, £16 for one set on ebay, nice fibreglass pads and some solid wiring all prewired. Fitted the control switches in the gear stick surround and fed the power from the fuse box down the centre console and under the carpet where the stock wiring emerges under the seat. Upon stripping the covers off I found loads of old hog rings that had been left in there when the car was reupholstered sometime in its life. Heat pads trimmed where the lateral seams needed to be hog ringed back into the slots in the foam cushion and the seat cover refitted. Same method used on the seat back with it detatched from the seat base. Seat lifted back into the car, secured and all the connections made, battery reconnected and a quick test of the switches made. Seats bolted back down and tested the heat settings with the engine running, nice warm seat and back on both seats. The photo shows the passenger seat occupancy sensor mat, the heat pad was fitted over the top of this, forgot to take pictures of the pads and switches, just got preoccupied fitting them. Will add a picture of the switches later.
 

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t-tony

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Nice job Col and going to be very helpful to people wanting to add heated seats. I would not be without mine.:thumbsup:

Tony.
 

Bigwinn

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Cracking job!

what’s a hog ring

actually not sure if I should ask
 

colb

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Hog Rings are upholstery fixings, a bit like a staple but when crimped they close around themselves to form a ring.
View: https://www.youtube.com/watch?v=1PSCyIq9eEs

They need a special pair of hog ring pliers to fit them, pliers and hog rings available on ebay.
 

t-tony

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@Bigwinn some people use small cable ties in their place Stuart. Personally in the past I've used 1/16" gas welding rod and side cutters.

Tony.
 

colb

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Z3 M43 1.8 (1999) and Z4 E85 2.5 (2003)
Picture of the heated switch positions in the gearstick surround, 20mm step drill used to make the holes for the switches, cable then fed down the sides of the centre console and under the seat where they are plugged into the main seat pad loom, ensuring they will not get snagged when the seat is moved fore and aft.
DSC_0012_2.JPG

I did have the airbag light come on and despite using BMW Scanner and Inpa to find the cause the only code I got was 20 70 2D which apparently indicates that the airbag light is lit. Many attempts at looking for the cause and clearing codes in the SRS module and Instrument Cluster Module failed to find the cause. Delved under the seats and checked continuity of the occupancy sensor mat, that proved ok so undid all the plugs and sprayed with contact cleaner, still couldnt get rid of the airbag light. Amazon delivery of the Creator 310+ scan tool was made, immediately put to use and found my way to the airbag module, this scanner found the satellite B post sensors, completly forgot what codes it found but on clearing them with the Creator 310+ the airbag light went off and so far has stayed off, time will tell.
I think the cause was me testing the switches when the seats were out of the car, shouldn't have reconnected the battery and turned the ignition on with the airbags disconnected. Will not be doing that again if the seats ever come out again.
Why the fault wouldn't clear or be found by BMW Scanner or INPA is a bit of a mystery, impressed with how the Creator 310+ performed and would reccommend it for ease of use, its a good bit of kit to have.
Ongoing issue to solve the DSC light and handbrake amber light which the Creator scanner identified as No1 pressure sensor on the master cylinder being electrically faulty. Awaiting delivery of replacements to solve that one.
 

t-tony

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The switches look very neat Col, like OEM mate.:thumbsup:

Tony.
 
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