How to Replace Roof Sensors

[Lambeth Cali]

Yes I just had a look. Seem more difficult to find. I bought an extra set of 4 as spares after mine broke. Seemed a good idea for £48.
I would have thought BMW would stock them for a while. Eastern Europe seems to have lots of spare parts generally but prices will rise if they think there’s a shortage.

 

[Lambeth Cali]

I’d grab these if I were you

Says Back Order but worth a try.
Or in EU

 

[egena]

There does seem to be a global supply issue for these hall sensors, due to supply chain constraints imposed by EV manufacturer demand. This may continue for the rest of this year but may become available in a couple of months.
Tis a gamble. Might be necessary to get whatever is available if you're in need (and the weather is favorable)

 

[Masher]

Did anyone manage to open up one of these failed sensors? I wondered if you could identify the hall sensor type inside. My electric bike motor failed due to faulty hall sensors and I was able to order a few for £3 from China and solder them in. Maybe they are moulded in to a solid lump of plastic and not accesible but just wondered.....

 

[vbk1975]

Did anyone manage to open up one of these failed sensors? I wondered if you could identify the hall sensor type inside. My electric bike motor failed due to faulty hall sensors and I was able to order a few for £3 from China and solder them in. Maybe they are moulded in to a solid lump of plastic and not accesible but just wondered.....

One of the other threads has the chip number, from memory it is an Allegro device that isn’t made anymore when I tried to find it. But I am sure other devices would work, I was contemplating 3d printed housing. There is another version with a different housing used on the roof latches that might be adapted.

I think there is a mix of rusty sensor magnets, that are no longer magnetic, but other sensors have failed more comprehensively with the rusty magnet swelling and allowing moisture into the PCB.

Post in thread 'Roof code 1000'
https://vwcaliforniaclub.com/threads/roof-code-1000.34527/post-553825

 

[WelshGas]

Kernow Transporters do a lot of these sensor replacements maybe they have a supplier and might be able to supply?

 

[WelshGas]

AI Overview


Alternative roof Hall sensor options for the VW California include the BMW part number 54347190735(originally used for the BMW 1 Series Convertible E88), which is widely used as a budget-friendly and direct-fit alternative to buying a whole new VW wiring harness. [1, 2, 3]

Alternative & OEM-Related Part Numbers

• • BMW Part Number: 54347190735 (Commonly used by VW California owners instead of replacing the entire factory loom). [1, 2, 3]
  • Volkswagen OEM/Related Numbers: 1Q0959121C / 1Q0959121K (Hall sensors used across VW/Audi convertible and roof mechanisms). [1, 2, 3]
  • JP Group: 1185450900 (Position Hall-sensor for elevating/convertible roof cylinders, ref AC854100). [1]
  • VW Factory Loom (If replacing the full assembly rather than individual sensors): 7H7971710 [1, 2]

Key Replacement Details

• • The Dealer Issue: VW officially states that the individual Hall sensors are not sold separately and require replacing the entire pop-up roof wiring harness (7H7971710), which can cost thousands including labor. [1, 2, 3]
  • The DIY Fix: Sourcing the alternative BMW sensor (54347190735) allows an auto-electrician or DIYer to replace just the faulty sensor block rather than the whole loom, drastically cutting repair costs

 

[WelshGas]

Available, but Business to Business not private purchase.

Maybe Forum Shop could supply to members?

Position Hall-sensor for elevating/convertible roof cylinder

jpgroup.dk

 

[chez786]

Available, but Business to Business not private purchase.

Maybe Forum Shop could supply to members?

https://jpgroup.dk/en/p/Position-Ha...ing them . Has anyone been successful recenty

http://

 

[chez786]

Jus looked at out of stock . Lots selling for v v inflated prices on eBay . There is a business here for anyone who can make an alternative

 

[vbk1975]

Jus looked at out of stock . Lots selling for v v inflated prices on eBay . There is a business here for anyone who can make an alternative

View attachment 152798

Other option is eBay for Roof Rams with the same sensors

Elevating roof issues, updates

Good thinking vbk1975 - I'll check for that. By the way congratulations for identifying the BMW part. You're going to save a lot of people a lot of money. Just keep it secret until I've ordered a couple for myself. I can see BMW 1 series convertible people having to buy VW wiring looms in the...

vwcaliforniaclub.com

 

[chez786]

sensors

Oooh will
Look

 

[Lambeth Cali]

Putting 54347190735 into eBay comes up with this. Has 2

 

[chez786]

Yes have emailed them , just wasn’t t expecting £119.99 each

 

[vbk1975]

Yes have emailed them , just wasn’t t expecting £119.99 each

https://ebay.io/m/7BhmYo

Two Sensors, obviously 2nd hand - but £20

 

[chez786]

https://ebay.io/m/7BhmYo

Two Sensors, obviously 2nd hand - but £20

Thank you ! bought and will update you on our progress . V v kind to help

 

[vbk1975]

Thank you ! bought and will update you on our progress . V v kind to help

I got these off Colt rams

 

[RainerB]

Yes I just had a look. Seem more difficult to find. I bought an extra set of 4 as spares after mine broke. Seemed a good idea for £48.
I would have thought BMW would stock them for a while. Eastern Europe seems to have lots of spare parts generally but prices will rise if they think there’s a shortage.

Thanks. Where did you buy them in the end. One link came up with: https://www.ecstuning.com/

 

[vbk1975]

Thanks. Where did you buy them in the end. One link came up with: https://www.ecstuning.com/

View attachment 153009

in the UK, the BMW source seems to have stopped, so buying 2nd hand Rams with sensors from other cars, like Mitsubishi Colt etc (only because they are really cheap and have 4 sensors). It might be that the US market still has stock as there are a limited number of California owners ;-)

 

[Lambeth Cali]

Yes it’s looking like the end of the road for DIY sensor swaps.
I vaguely recall the place in Cornwall that fixes roofs - is it Kernow Transporters? - don’t use sensors at all in there workaround, although I could be mistaken. I thought they bypass the controller.

 

[jeff]

Yes it’s looking like the end of the road for DIY sensor swaps.
I vaguely recall the place in Cornwall that fixes roofs - is it Kernow Transporters? - don’t use sensors at all in there workaround, although I could be mistaken. I thought they bypass the controller.

Yes Kernow Transporters can bypass the controller and make the roof remote control.