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TPMS, moving it from steel to alloy wheels

Discussion in 'Wheels & Tires' started by KirthGersen, Nov 10, 2018.

  1. Nov 10, 2018 at 2:55 PM
    #1
    KirthGersen

    KirthGersen [OP] New Member

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    2018 SR5 Crewmax
    I've literally spent hours today researching this TPMS stuff :-(

    I'm shopping for near-new TRD wheel "take offs" , and seems most sellers have removed the TPMS.

    My truck is 2018 CM with original steel wheels (under 600 miles!), and it presumably uses the 40º angled sensors (part# 42607-0C101).

    2018 & newer OE alloy wheels use 20º angled sensors (# 2607-0C091)

    There are several threads where the 40º steel wheel TPMS has been flipped & re-installed onto OE alloy wheels, with the caution the 40º sensor doesn't lay flat against the rim & is hard to mount tire without damaging sensor , or will break if tire flats.

    > > How likely is it a decent tire installer would break the 40º sensor on alloy rim, when a tire is mounted?
    Have any of you specifically had this problem?

    > > is it low risk to also move the "fitting kit" from steel wheel to alloy wheel?
    The kit seems to be what seals against air leakage.

    A set of 4 brand new, 2018 OE sensors is at least $240 ... the extra effort to swap existing TPMS to new wheels seems worth it. ... but if a sensor breaks during the switch over, I wont have a new sensor on-hand to immediately substitute.
     
  2. Nov 11, 2018 at 6:14 AM
    #2
    jeremyd

    jeremyd 2014 Crewmax SR5

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    ProComp 6" 35/12.50/18 -11
    It's highly likely that if you try to switch around the 20 and 40 degree sensors, one or more will get broke. A quick check on Ebay showed 4 sensors for a 2018 at 129.00.
    I know lots of people frown about Ebay, But if it works it works..
     
  3. Nov 11, 2018 at 7:43 AM
    #3
    Hammy68

    Hammy68 New Member

    Joined:
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    2018 Silver Tundra TRD Off Road Crewmax
    Toytec Leveled, TRD Dual Exhaust, Nitto RGs 275/70/18, Rugged Cover Hard Tonneau, Rhino Liner, LED interior/exterior upgrade
    You’re probably better off leaving the sensors in the stock wheels and having aftermarket ones put in. They are easy to break and it’s even harder if there’s any corrosion, etc. Our local garage is doing aftermarket ones for 40 a piece, all programmed. Got a set for the winter wheels we put on my wife’s 4Runner.
     
    Grey Wolf likes this.
  4. Nov 23, 2018 at 7:56 PM
    #4
    nmpeter

    nmpeter New Member

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    My shop installed them with no issue. I’m not sure how they did it, but i did tell him that it may not fit. Somehow they made it work. I read somewhere that sometimes they need to be installed backwards
     
  5. Nov 23, 2018 at 8:14 PM
    #5
    KirthGersen

    KirthGersen [OP] New Member

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    2018 SR5 Crewmax
    Update from OP:
    Today a tire shop moved TPMS from my original 18" steel wheels to new alloy "TRD Offroad 18inch" wheels (all wheels 2018 model year).
    I was standing next to mechanic while he did the work.

    The original sensors fit fine on new "TRD Offroad" wheels!

    Sensors lay flat against the wheel rim, as they're supposed to. The valve stem is 'square' -- not cocked -- with respect to mounting surface inside & outside the rim. We bubble/soap tested the sensor valve stem for leaks - all OK.

    It beats spending $250 on OE Toyota sensors and another $100-200 for dealer computer programming!

    I'm at a loss to understand why many have stated the steel wheel sensors have to flipped, when reinstalled onto alloy wheel.
    If we had flipped the sensor, no way could the tire bead been resealed with breaking the sensor.

    Maybe it depends on the specific year & model of the wheels.

    I took some pics -- I'll sort thru my pics and post later.
     

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