Low Air Warning

[Bernardleo]

Hi

New on here

I had a ls430 2001 this car had nice 20 inch rims

I just bought a new ls430 2004

Few more toys on it !

I put the 20 inch wheels on new 2004

But it now has the warning light and also says low air

Have checked tyre pressure and its fine

Any one know how the car reads tyre pressure

Or any ideas ?

The old 2001 did not have the air pressure check system on it

Thanks for any ideas in advance

[Exdee]

You need to remove the valves from your old alloys and insert them into your new alloys. It may also need a new calibration using tech-stream.

Word of caution: Be careful when removing the tyre. The valve can snap easily.

[Bernardleo]

Ok thanks for reply

Will have to buy new valves as old wheels from 2004 car where swapped on to my old car part of trade in deal

You live and learn

Thanks again for reply

[steve2006]

Good learning curve, the valves are over £100.00 each! I think I would go and find your old car and ask for them back as they are no use on a non TPMS model.

[The Editor]

Good learning curve, the valves are over £100.00 each! I think I would go and find your old car and ask for them back as they are no use on a non TPMS model.

No they are not. They used to be but prices have come down more recently. Genuine Lexus ones (Made by Pacific) are £55 plus VAT and of course there are generic ones floating around now which work on 315Mhz and should be programmable via any dealer that has a decent TPMS Programmer.

You will also need a TPMS seal kit for each sensor and these are around £6 or £7 each.

[steve2006]

Sorry my mistake I was going from a recent post when the price was mentioned, so they're almost Buy one get one free now then! :D

[The Editor]

Yup - if you compare the price to a year or so, they are 'almost' good value for money . I think the generic ones that have appeared recently has driven down the price of OEM ones. (Plus production costs must have decreased now they have been around for 7 or 8 years.)

One interesting fact - the dealers I have spoken to have never had to replace a TPMS due to Battery failure (only mechanical failure due to breakage usually by trye fitters!). I believe they first appeared on Lexus in 2005/6 so the original ones are over 7 years old and still going strong.