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Assuming McLaren kept some practices the same, my 12C came with manual seats, BUT the car was fitted with the electrical harness for electric when built. Apparently the framework is built for either, then specific seats fitted later down the line which may be manual, for whatever reason. So yes I was able to upgrade to some 650 seats, plug & play. HOWEVER, there was a module missing in my car which prevented the car from recognizing the seats, so it threw a fault code. Seats worked fine in all aspects, heat, movement, etc., but had to get this module fitted at dealer (near fuse box) for fault code to disappear.
So make sure your car has the full electric plug. May be sitting under the seat, on the floorboard, like mine was. I was then able to compare pics to the harness plug on electric seats and I saw they were exactly the same.
 

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silly question but what are you hoping to achieve from the swap? is it just for the heated seats? because they switch on from the Iris so as per above it would need some kind of coding or programing to add that to the Iris, if its for the electric adjustment, how often would you really need to use that? I can't have the powered seats in mine, i'm pretty tall and they are about an inch higher, if you are desperate for heated seats, there was company i spoke to who would take a standard seat apart and add heating elements as an after market with a switch down by the seat controls, but I thought i'd try it without for a bit and honestly once the engine heats up I never find i miss them.
 

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Discussion Starter · #5 · (Edited)
silly question but what are you hoping to achieve from the swap? is it just for the heated seats? because they switch on from the Iris so as per above it would need some kind of coding or programing to add that to the Iris, if its for the electric adjustment, how often would you really need to use that? I can't have the powered seats in mine, i'm pretty tall and they are about an inch higher, if you are desperate for heated seats, there was company i spoke to who would take a standard seat apart and add heating elements as an after market with a switch down by the seat controls, but I thought i'd try it without for a bit and honestly once the engine heats up I never find i miss them.
Not a silly question, if you have a bad back and continually leaning forward to grab the 'seat release handle' causes pain!
 
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