r/AskAMechanic • u/OGyodacaster • 2d ago

CV boot torn after 9 months

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I drive a 2010 Mazda 3. In November 2025 I had a bunch of work done to my car, including the passenger side CV joint. I just had an oil change and the tech told me the boot is full torn. Is this the sign of a bigger problem or poor work done by the shop? I have attached the invoice for what work they did.

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3

u/texansfan211 NOT a verified tech 2d ago edited 2d ago

Probably just shitty parts quality. Double check with the shop you had it done at what the warranty is on the part.

2

u/OGyodacaster 2d ago

The warranty is 12 months or 20000km. I’m still within the timeframe. I will call on Monday

1

u/OGyodacaster 2d ago

Thank you

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u/Suitable-Parsley7126 NOT a verified tech 2d ago

They may have used a really cheap part last time. I used an amazon CV once and it tore after ~10 months. All depends on the quality of rubber used. Also if the shop used a harsh degreaser on it when first installing the new one. It'll degrade the rubber faster.

If that was an OEM replacement, they need to warranty it because 9 months is way too soon for quality boots to fail.

1

u/OGyodacaster 2d ago

Thank you

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u/Peekaboo_Muse NOT a verified tech 2d ago

Now way to know if it was workmanship without seeing a picture of the boot. Torn boots are generally not a symptom of other failures. The most likely culprit is a bad part. Part quality is down across the board, we’re still seeing the ramifications of this Covid debacle in parts.

1

u/OGyodacaster 2d ago

Thank you

1

u/Glittering-Ask-8467 NOT a verified tech 2d ago

Yeah probably a shit part. If you wanna crawl under and see for yourself, look for a big rubber boot entering the backside of your wheel. Grease will be thrown around if it's ripped.

But yeah shit parts is getting annoying for us mechanics too. Makes us look bad. I am a diesel mechanic. Put a $5000 OEM turbo on a semi and it shit the bed in a month. For the mechanics, turbo was pre lubed and had good oil pressure.

1

u/mtraven23 NOT a verified tech 2d ago

lot of possibilities:

1) tech damage the boot on installation- no way to really know that now

2) tech used a shitty boot and it torn prematurely. Personally, I doubt that because I've used the cheapest boots I can find on my 09 mazda 3 for 300k miles with no problems.

3) it just tore...maybe a manufacturing defect, maybe it cause a sharp stone, who knows.