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Thread: Is TPMS a joke?

  1. #1
    Join Date
    Aug 2016
    Location
    Upstate NY
    Posts
    85
    My Cars
    Honda S2000, VW Jetta TD

    Is TPMS a joke?

    or is it just my car ( 15 335xi MT)?

    Wife came home with a an urgent Low Tire Pressure tire warning( pull over, drive slowly Blah blah)

    Checked with my old school Longacre gauge and measured a whopping 4 lbs low! ( 34 vs 38).

    Aired up and ran out for gas before doing reset and Sport mode wouldn't come on.

    Set pressures to spec with Longacre this AM and took a drive for Reset. TPMS immediately showed a 1.2 lb difference between LR/RR which I know is not true.

    So TPMS is inaccurate within a tenth of a lb? Brilliant German engineering.

    A gizmo to make driving better for us is effectively a PITA

    IMHO, it's the gizmos not the excellent chassis and drivetrains that hurt the value of these cars as they age.

    Thanks for listening

  2. #2
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    9,933
    My Cars
    2018 BMW M240i
    It could be that one of the rear TPMS sensors is going bad. They are battery powered, so perhaps the battery is getting low.

  3. #3
    Join Date
    Aug 2016
    Location
    Upstate NY
    Posts
    85
    My Cars
    Honda S2000, VW Jetta TD
    Thanks, both left side tires and wheels were replaced as a result of a NYS Thruway pothole less than 1000 miles ago.


    Could still have old sensors in their.

    Do we know if battery affects accuracy?

  4. #4
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    9,933
    My Cars
    2018 BMW M240i
    All electronix are affected by erratic electrical power. The sensors in your car have a battery. However, the shop that replaced the tires could have fubar’d the sensors.

  5. #5
    Join Date
    Oct 2018
    Location
    turkey
    Posts
    13
    My Cars
    bmw
    no what happen ?















    Ccleaner Happy Wheels VLC
    Last edited by zoziano; 10-14-2018 at 05:21 PM.

  6. #6
    Join Date
    Jan 2016
    Location
    Ca
    Posts
    6,981
    My Cars
    2001 525it
    Also we have had problems with the after market tire pressure battery's supplied by tire shops. I forget who is the original maker it would say on the battery use those

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