It's a good question as if you have the TPMS you can only buy the valve and sensor complete from a dealer, which turns out rather expensive.

I've seen a few places that sell replacement valve bodies but whether they fit the Aston sensor is another matter. Anyone?

Alternatively if you don't care about the TPMS then just have the system disabled and ask your tyre fitter to fit regular valves.

I do recall someone having located replacement stems but can't find the linky.

My wheels are currently being refurbed, and I got a call that the valves are corroded. Apparently the sensors bolt on underneath the valve body and these are usually OK. It is the valve body that corrodes and there is a BMW part at approx £15 each. The link is http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Thanks to mjk1

thanks for replies but cant seem to track down that part number from previous topic but i found this site http://www.alloywheelsdirect.net/option/tpm_sensor... which sells the valves but not sure which ones will fit.

The BMW part number is in the link I provided above.

Quote: [i]Having reported earlier in the thread that I was having my V8V wheels refurbished by The Wheel Specialist in Burton I'm now in a position to give some feedback. I'd taken the wheels off myself and didn't get chance to put them back on and make sure the tyre pressure sensors were still working until yesterday.

Well everything was fine and the wheels now look like new again. Would have no hesitation in recommending this company. It all started fairly badly on the first morning when I got a phone call to say 3 of the 4 valves were seized and in the past someone had done a shoddy weld repair to one of the front inner rims. Thought I would be looking at a huge bill but by the end of the day I'd had another phone call to say they had sourced some valve and sensor housings from BMW allowing the sensors to be reused. The cost for 4 was £55.49 and the BMW part number 36.46792830. Aston only sell the whole assembly including sensors and valves for many hundreds of pounds!

The weld repair was redone and the welders initials stamped onto the rear of the hub of the wheel showing they stand by their workmanship. The cost here a very reasonable £35.[/i]

The cost of the refurb itself was £408 which isn't the cheapest around but nothing was added for the time it must have taken trying to remove and then cutting off the valve and sensor. I went for the low fleck Hi-Power Silver finish as it is the closest to the original finish. Time will tell how durable the finish is but I doubt it will be any worse than the original which were suffering significant amounts of corrosion after 5 and a half years.