TPMS light giving me fits!

[mtrdrms]

The light comes on mostly for the rear tire but sometimes the both. It just shows lines with no psi. Can someone tell me if the battery is replaceable in my pressure monitoring units? I have a 2007gs.

Thanks!

[JimVonBaden]

The battery is not replacable. They are usually good for about 5 years. The fix is usually a new unit.

Jim

[SkiFly01]

There was one on ebay I saw going for $89. http://www.ebay.com/itm/2009-bmw-r12...item19caf001ff

[ed9j]

It's possible to fix the units. Here are pictures of the units with the resin cleared clearly showing the $5's woth of batteries.

[JimVonBaden]

Originally Posted by ed9j

It's possible to fix the units. Here are pictures of the units with the resin cleared clearly showing the $5's woth of batteries.

Nice!

What did you reseal it with, and what is the battery number?

Jim

[David13]

Can we get a pictorial on how you do that? Those things are around 140 and that might save a lot of people a lot of money.
I wouldn't trust a used one or one from ebay.
If you do replace them, do they work as is, or does the computer have to be sync'ed onto the new unit?
dc

[ed9j]

I dont have the battery specs. the old batteries are in the trash. But I can help with resealing it. I've used a special kind of epoxy. After a lot of deliberation and some reseach I've used a epoxy that remains some what flexible (compared to other epoxies) after curing. Regular epoxies tend to become very hard used without a filler material susceptible to cracking under vibration. The one I've used was git-rot that I've purchased from West Marine. I live in Turkey and didn't find a lot of options.Opening the unit is no big deal. If you show the material that you've cleared to someone with knowledge in composites, he clearly can recommend you something. Worst case use git-rot. It can be found everywhere.

[ed9j]

the units worked flawlessly. I didn't ride the bike during the repair.so the computer didn't record a error code.

[BasarGuven]

Successful battery change reporting... My TPM has resurrected, goodbye yellow warning.
It is standard CMOS battery that computers use. You can find it under code CR2032.

Remove the wheel, mark the direction unit was mounted, Heat the black goo a little carv it off starting from center of the goo.

Stick a tiny screwdriver between the battery and the metal connector. Lift the battery gently a little, do the same for the negative metal. Solder the new battery. Close up with a heated glue gun. Take care to solder the battery really well to the metals.

Your rdc will come back when you hit 30kmh or gs911 reset of errors.

[enkil]

Originally Posted by BasarGuven

Successful battery change reporting... My TPM has resurrected, goodbye yellow warning.
It is standard CMOS battery that computers use. You can find it under code CR2032.

Remove the wheel, mark the direction unit was mounted, Heat the black goo a little carv it off starting from center of the goo.

Stick a tiny screwdriver between the battery and the metal connector. Lift the battery gently a little, do the same for the negative metal. Solder the new battery. Close up with a heated glue gun. Take care to solder the battery really well to the metals.

Your rdc will come back when you hit 30kmh or gs911 reset of errors.

Thanks mate

[SkiFly01]

What about the rubber seal to the wheel? Did it need replacing, or did you do Part # 36 31 8 520 871 (2 in the image)

[J.B]

Thanks so much for this. My service dept. quoted me 480 aussie to supply and fit..It only took a couple of hours to replace both front and rear sensor batterys and the fault went away after a couple of miles :)

[tagesk]

I've added this information to the GSpot FAQ (3.50)
Thank you!

[TaSK]