What Happens Re TPMS With New Tyres.

binao

Hi all.

What happens re TPMS with new tyres?

Car is a Merc A160. Looking at 2 new rear tyres.

Goodyear Vector 4 Seasons Gen-2

185/65 R15 88T

Thanks for all replys.

Car_54

I had a new tyre recently, and Kwik-Fit charged me for replacing the sensor. My car doesn't have sensors, so a frank discussion took place.

binao

Car_54 said:

I had a new tyre recently, and Kwik-Fit charged me for replacing the sensor. My car doesn't have sensors, so a frank discussion took place.

Thanks.

What reason did KF give for having to replace the unneeded sensor?

400ixl

What type of TPMS do you have? I would have thought the A160 is one which uses the ABS sensors rather than the in tyre sensors.

If that is the case there is nothing for them to do other than reset the system when done.

If it is the in tyre sensors, then the only need to replace the inner core of the valve and not the TPMS valve itself. Again, once complete they reset the system.

binao

400ixl said:

What type of TPMS do you have? I would have thought the A160 is one which uses the ABS sensors rather than the in tyre sensors.

If that is the case there is nothing for them to do other than reset the system when done.

If it is the in tyre sensors, then the only need to replace the inner core of the valve and not the TPMS valve itself. Again, once complete they reset the system.

Thanks.

I'm unsure re type of TPMS. 

As I understand TPMS, ABS Is "indirect" and works by tyre rotation speed.

Not sure  how to recognise which type I have.

fatbelly

On a related issue - good tyre choicre. I'm running them on a Seat Mii. One without tps.

Seems a good tyre in all conditions and virtually no wear in 15000 miles. I' ll be replacing them on age grounds rather than tread depth at this rate.

I did notice a bit more tyre noise when they replaced Conti PremContct 2. 

Goudy

When you have new tyres fitted they will replace the valve stem as they can perish and leak over time.

Cars with in wheel pressure sensors require the sensor to be unscrewed from the valve stem (which is slightly different from the standard stem) and refitting to the new valve stem.

Some tyre fitting places make a bit of a song about it so they can charge a bit more but the valve stem isn't that much more expensive than a standard stem and there's usually only one screw holding the sensor to the inner end of the stem/valve. It's hardly a big and expensive job.

As already mentioned, some makes and models don't use in wheel sensors but use the ABS system to try and work out if there's a flat tyre.

400ixl

Usually direct will show the tyre pressure in the display for each wheel in real time. Indirect you typically  just get a warning when there is an issue with no real time pressure.

facade

The A160 with the digital screen dashboard can display actual pressures, so it is a tyre sensor system, the one with proper dials just has a "runflat active" indicator, so it is an ABS based system.

If you can use the arrow keys to find "service" and then "tire pressure" (most likely they have tires, not tyres) and get a reading of the pressure then it has sensors.

boobyd

With some tyre pressure sensors they are mated to the axle and can throw errors if not put back to the correct axle(had a week of faults/low pressure,had to go to main dealer to sort in the end)

binao

Thanks for all replys..

An afterthought, should balancing and alignment be included or an extra?