Mazda6 Owners Club | M6OC

It is becoming apparent that there may be an issue with the metal used in the camshafts of some gen 3 engines. This isn't an official Mazda statement by any means and I don't know how common the issue is BUT....

There are now 3 gen 3 mazda 6s sat in a Mazda garage I know all of which have badly worn cam shafts, 2 of which the metals shards have caused the turbos to blow up. This is too much of a coincidence for me to not share this information with you. Also when accessing the mazda site via the mazda portal they apparently have a picture of a normal camshaft and one that's excessively worn and in need of replacement. Now that tells me that mazda are aware there's a problem and it wouldn't surprise me if a recall is sent out pretty soon. It's likely this was an early issue and has since been rectified also.

I don't want to worry anyone, more inform you to keep your ear listening.

If you are getting a rattle from the engine when changing gear then I suggest you take it to garage and ask them to check the camshafts condition.

All 3 examples are under 25000 and therefore still under warranty and mazda are paying for the repair (including 3k turbos!).

This is a normal camshaft :



Where the metal blocks are, the bad examples are wearing grooves into these.

Thanks Ross, will listen out for any strange noises.

Hi Ross, does this apply to petrol, diesel or all engine types?

Only 3 in the garage are diesel at the mo. Could be a big coincidence I don't know, just thought it was worth mentioning

Is there any more specifics to this news yet? Or too early to tell? Were they 2013 or 2014 registered models? My car is 2014 (63) plate.

That's all I know I'm afraid. Just had a word with a mechanic and that's what he told me

Very worrying, are there any warning signs besides standing at the side of the road with the hazards on?

Just the knocking was reported by each person that took them in

There is also a Mazda bulletin for juddering brakes and I've just had mine skimmed at the first service and so far that seems to have fixed the problem. I would have thought it was heat cycling the discs that caused the problem, but apparently it was to do with the pads - what I don't know.

Roger M wrote:There is also a Mazda bulletin for juddering brakes and I've just had mine skimmed at the first service and so far that seems to have fixed the problem. I would have thought it was heat cycling the discs that caused the problem, but apparently it was to do with the pads - what I don't know.

That's interesting. I took my car into the garage back in February of as I was experiencing juddering when braking. They told me nothing was wrong and the brakes were fine. It's also had its first service back in April and nothing was mentioned then either. We're you informed of the brake issue through mazda them selves?

It's still juddering under braking.......

Cheers