05 Elantra GLS 5-Door, Rear brake pads wore out at 14K miles

Discussion in 'Hyundai Elantra / Lantra' started by 05and06elantra, May 23, 2006.

  1. Anyone else ever run into a problem where their rear brake pads wore
    out at 14K miles? I mean all four worn all the way down. This is not
    an issue with one side of a caliper hanging, nor did the dealer find
    anything wrong with the calipers.

    It's my wife's car and she does do a lot of city driving but the front
    pads have hardly been used (10/32" remaining, new pads measure between
    11&12/32") and the rear ones are shot. The dealer I took it too turned
    the rotors (under warranty) and replaced the pads (at my expense of
    course) and said they didn't see anything mechanically wrong and to
    bring it back in another 3-4K for them to take a look at it.

    Looking for any info I can relay to the dealer to tell them to look for
    if anyone has come across this problem. Any help would be appreciated.

    05and06elantra, May 23, 2006
  2. 05and06elantra

    Mooron Guest

    I've seen this before. It happens when you drive with the parking
    brake on.

    - Mooron
    Mooron, May 23, 2006
  3. 05and06elantra

    Rick Guest

    If your wife is like my wife, tell her she needs to take the
    parking brake off when she drives.
    Rick, May 23, 2006
  4. Well, that's not the case in this situation. And it's my understanding
    (though I may be wrong) that the parking brake only enages the rear
    driver's side brake. Therefore, this would not explain the same wear
    on the passenger's side. My intial thought was that maybe the parking
    brake wasn't releasing completely, but if my assumption is correct
    about the parking brake only engaging one set of brakes, that
    eliminates that as a possiblity as well.
    05and06elantra, May 23, 2006
  5. Don't be so sure. I just checked the online service manual on Hyundai
    Webtech and the parking brake definitely works on BOTH rear wheels. For
    that matter, I've never heard of a car that only used one wheel.
    Remember, in addition to it's parking duties, this is the emergency
    brake that you're supposed to use in case of a hydraulic failure in the
    main brake system.
    Brian Nystrom, May 23, 2006
  6. 05and06elantra

    Bob Adkins Guest

    Check the proportioning valve. (I assume it has one!). The function of this
    valve is to reduce braking pressure on the rear brakes. That's because the
    rear wheels are much easier to lock under hard braking than the front
    brakes. It's possible that computer control/ABS have supplanted the
    proportioning valve. I haven't been under a new car to check, thank
    goodness. :)

    Meanwhile, you can jack up each rear wheel and give it a spin. They should
    spin freely, or perhaps with a slight intermittent light rub. (Even
    near-perfect rotors usually have .0005-.001 runout, and can rub a little bit
    in spots.) If the pads rub hard enough to prevent a full spin or 2, you
    have a problem.
    Bob Adkins, May 23, 2006
  7. 05and06elantra

    Matt Whiting Guest

    I'm not familiar with the Elantra, but does it actuate the normal
    service brakes for the parking brake function? I'm pretty sure the new
    Sonata has separate drum brakes for the parking brake separate from the
    disc service brakes.

    Matt Whiting, May 23, 2006
  8. Yes, it does.
    That appears to be the case. The diagram isn't as clear as I'd like, but
    it looks like it actuates pads that run inside the periphery of the
    cylindrical part of the brake disk. If that's actually the case, it may
    be fine for parking, I can't see it being of much use as an emergency brake.

    Smart companies like Saab use the front brakes as parking/emergency
    brakes so that you still have ~70% braking capacity in the case of a
    complete hydraulic failure. They also use dual diagonal braking circuits
    instead of front and rear circuits, so you don't lose more than 50%
    braking capacity if one circuit fails.
    Brian Nystrom, May 24, 2006
  9. 05and06elantra

    Matt Whiting Guest

    This being the case, it sure sounds like the person had run the car for
    a long distance with the parking brake on to wear our the rear pads well
    before the fronts.

    Does the Elantra and the Saab actuate the service brakes as parking
    brakes using the main hydraulic system or do they use a mechanical
    system that somehow actuates the main brakes?

    Matt Whiting, May 24, 2006
  10. They're cable actuated.
    Brian Nystrom, May 25, 2006
  11. 05and06elantra

    Matt Whiting Guest

    How does the cable actuate the hydraulic disk brakes? Is there a
    separate set of pads for the parking brake? Does the cable actuate a
    separate master cylinder that applies the brakes?

    Matt Whiting, May 25, 2006
  12. Check out the diagrams in the online manual at www.hmaservice.com for
    Brian Nystrom, May 25, 2006
  13. 05and06elantra

    Darby O'Gill Guest

    .....I remember when I was a kid and a new licensee....My older cousin was up
    from Maryland with his newish Audi Fox. He let me and a buddy take it for a
    joy ride. We went 20 or so sluggish miles. It smelt really bad when we
    pulled into the driveway! You can guess... we went those miles with the
    E-brake set. What a knucklehead I was.
    Darby O'Gill, May 25, 2006
  14. 05and06elantra

    sqdancerLynn Guest

    I don't like rear discs they seem to wear out way too fast My 95 elantra
    has 150K miles===Still has the original rear shoes & drums. On its 2th
    set of pads & rotors
    sqdancerLynn, Jun 2, 2006
  15. So you'd rather have inferior brakes just because they last longer?

    The original poster's situation is not at all typical of the rear disc
    brakes on the Elantra.
    Brian Nystrom, Jun 2, 2006
  16. 05and06elantra

    Matt Whiting Guest

    That is only because the rears aren't working properly.

    Matt Whiting, Jun 2, 2006
  17. 05and06elantra

    Mike Marlow Guest

    It has the original shoes and drums because they are not doing anything.
    You can expect to get a million miles out of these. But that does not make
    them a good brake system. Drum brakes are essentially useless after <10,000
    miles if you don't keep them adjusted up. Don't count on the automatic
    adjusters to do that for you either. But - if you prefer lots of miles to
    real braking, then by all means - love them drum brakes.
    Mike Marlow, Jun 2, 2006
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