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Thread: Brake booster failure/CX-5 loaner

  1. #1
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    2012 CX-9 GT AWD

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    Brake booster failure/CX-5 loaner

    My 2012 CX-9 AWD GT (51K miles) started to show sign of brake booster failure. I would get a hard pedal intermittently with very little brake force (DW almost almost rear ended someone). After some research, I found Mazda SSP93 and did the diagnostic test myself and confirmed a bad brake booster. I needed to do the lower control arm recall anyway so I brought it to the dealer. After 3 days in the shop, I have new LCAs and brake booster and not a cent less in my pocket!

    As a bonus, the dealer's loaner car turned out to be a 2016 CX-5 AWD sport. I have been itching to drive a CX-5 and this worked out really well. I like the handling of the CX5. It corners without a lot of body roll and I think it hold true to the zoom zoom nature of the brand (much more than my CX9). In fact, i think the ride is a tad harsh (for an SUV) and I say this given my other car is an '06 Mitsubishi Evo9. The ride quality of the CX5 surprised me quite a bit. The other thing that stood out was hearing the groan of the engine during acceleration and low speed lugging. I had place the CX5 as one of the options come the day I ditch the Evo9. Now I'm not so sure anymore. When are they gonna make an AWD Mazda6?

    Anyhow, just sharing my experiences.

  2. #2
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    For the benefit of others who may have the brake booster issue here's my experience. The vehicle is a 2012 GT with just about 60,000 miles. I did notice that the brake pedal feel was not right for a while but continued to monitor it for about 6 months. Over that time it became more unpredictable as to how it became way too firm and difficult to press at times. Mostly the issue was a parking lot speeds when re-started after being parked for a short time. At the end pressing very firmly on the pedal caused a very audible whistle from the booster.

    Took it to the local dealer yesterday and was pleasantly surprised with the loaner, a fully loaded CX5. Drove great and it's an impressive vehicle. Tech found that my issue matched the symptoms for the SSP93 bulletin and the booster and stop light switch were replaced at no cost. They do say it has to match the symptoms in the letter to qualify for the repair to be done under the extended warranty. If you are bringing in your vehicle for this be very clear to state the conditions that match the letter. The fact that mine was whistling so loudly made the diagnosis pretty simple I suspect.

  3. #3
    Registrierte Benutzer Chris_Top_Her's Avatar
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    '15 CX-5 Miata GT AWD w/Tech 2.5L

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    That sucks. Even worse no manual handbrake.

  4. #4
    Registered Member JPL's Avatar

    2018 CX-9 Signature

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    Quote Originally Posted by pugsx View Post
    My 2012 CX-9 AWD GT (51K miles) started to show sign of brake booster failure. I would get a hard pedal intermittently with very little brake force (DW almost almost rear ended someone). After some research, I found Mazda SSP93 and did the diagnostic test myself and confirmed a bad brake booster. I needed to do the lower control arm recall anyway so I brought it to the dealer. After 3 days in the shop, I have new LCAs and brake booster and not a cent less in my pocket!

    As a bonus, the dealer's loaner car turned out to be a 2016 CX-5 AWD sport. I have been itching to drive a CX-5 and this worked out really well. I like the handling of the CX5. It corners without a lot of body roll and I think it hold true to the zoom zoom nature of the brand (much more than my CX9). In fact, i think the ride is a tad harsh (for an SUV) and I say this given my other car is an '06 Mitsubishi Evo9. The ride quality of the CX5 surprised me quite a bit. The other thing that stood out was hearing the groan of the engine during acceleration and low speed lugging. I had place the CX5 as one of the options come the day I ditch the Evo9. Now I'm not so sure anymore. When are they gonna make an AWD Mazda6?

    Anyhow, just sharing my experiences.
    2016 CX-5? That's the last generation model. A design from 2012. The 2017 is a whole different animal, much more refined and quiet. If you were considering the CX-5, you need to drive the current model which is rated the best compact next to the CR-V by most publications.

  5. #5
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    Quote Originally Posted by JPL View Post
    2016 CX-5? That's the last generation model. A design from 2012. The 2017 is a whole different animal, much more refined and quiet. If you were considering the CX-5, you need to drive the current model which is rated the best compact next to the CR-V by most publications.
    Totally agree after driving the 2018 version, exceptionally well put together and the features are extensive given the price point.

  6. #6
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    2011 Mazda CX9 Grand Touring

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    Jun 2018
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    TX
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    My car is out of warranty by date, but mileage is well under the 90,000 miles of the warranty. (73,641 at time of repair). When pressing on brake pedal, the pedal was so stiff that it didn’t move it all. Quite a scary feeling when your brakes don’t work. I pressed again and they worked. A few days later, I pressed on the brake to stop at a red light. While still pressing on the brake pedal at the light, my foot began to go all the way to the floor. Quite alarming. I took my car to the dealer and was told that I needed a new Brake Booster and Brake Switch. I did a quick google search and found that “Brake Booster Failure” is a known problem for my car, and others. Mazda attributed the problem to a defect in the mold used when forming the diaphragm and/or continuous operation in environments in high ambient temperatures. Knowing this brake problem exists in my car and others, a recall was not issued because it was determined this was a “progressive failure that developed slowly over time”. Are you kidding? My brakes are defective but because the issue probably won’t be discovered until AFTER my warranty expires, let’s not issue a recall notice. Or for that matter, let’s not even send a letter to maybe let the driver know this is a possibility. After speaking with the service department at the Mazda dealership, I contacted Mazda USA (800-222-5500 option 6) and spoke to a representative. I expressed my concern for the fact this was a known issue and he repeated (several times) this was not a recall. Once we got passed that, he put me on hold for several minutes. When he returned he said they would pay all but $161.64 of the $933.05 repair bill. While I was extremely surprised and very pleased, it doesn’t make it OK that Mazda knew my brakes would fail and chose not to recall these cars. Moral of the story -- if your car has this issue, before you have the repair performed, and preferably while your car is at the dealer service department, contact Mazda USA. They should pay for most of this expensive repair, which they were fully aware would be necessary.

  7. #7
    Registered Member

    2007 Mazda CX-9 Touring

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    Or better yet why not complain and tell the people at NHTSA about your experience. A lot of owners probably don't have the time to go through all this and also not all dealers are this cooperative. With a recall you will also get back the 161 dollars that you paid for a repair that should really be a safety recall.

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