According to the 2015 TUV report. Full article here

Here is the classification of the defect rate based on age categories:

2-3 years old

Mercedes SLK 2.4%
Audi A6 2.9%
Mercedes GLK 3.9%

4-5 years old

Mazda 3 5.4%
Porsche 911 6.4%
Toyota iQ 6.5%
Toyota Avensis 6.5%
VW Polo 6.5%

6-7 years old

Porsche 911 10.5%
Mazda2 2%
VW Golf Plus 11.5%

8-9 years old

Porsche 911 11.5%
Toyota Corolla 15.6%
Toyota RAV4 6%

10-11 years old

Porsche 911 14.6%
Subaru Forester 19.3%
Toyota RAV4 20.2%

 

Nice find. I just don't understand all the hype on the IMS potential failure.
Esp, as its not all that expensive to repair. ive not met a single owner yet whos replaced one.


Nice to see per the poll, the 911 beats out a 10 year old corolla by ~4%.

 

I was under the impression that the IMS bearing failure would cause the engine to basically grenade and thus be extremely expensive. Am I incorrect?

 

That info does not tell you enough. There is a big difference between 5% of cars with catastrophic engine failures and 15 % of cars needing a new alternator or master cylinder.

 

How are 6-7YO Mazda2 2% vs 911 10.5% and 8-9YO Rav4 6% vs 911 11.5% worst...

 

true seems a little skewed by the fact that an ims issue is a lot more costly... but on the bright side there are alternatives to addressing IMS depending on model year. and yes i own a "problematic" 05.

 

No, you're correct. Those failures are rare (less than 5%) but there are plenty documented and they seem to happen without much or any warning. Early -05 cars seem most vulnerable with the risk tapering off with -06 through -08 cars.