MOT Failure Statistics - released by VOSA as a result of FOI request

alexthecheese

alexthecheese

alexthecheese

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The government agency which oversees the MOT system has backed down after 18 months and released data which shows how often different makes and models of cars and small vans fail MOTs.

This means that car and van buyers will now have access to the detailed MOT records of individual models, including reasons for failures. The figures show wide variation between different models, even when comparing vehicles of the same age.


The Vehicle and Operator Services Agency (VOSA), an arm of the Department for Transport, yesterday revealed 1,200 pages of detailed statistics on MOT failures following a freedom of information request made by the BBC in July 2008.

VOSA initially declined to supply the material, but last month the information commissioner ruled that disclosure is in the public interest and overturned VOSA's refusal.
Click to expand...

http://www.bbc.co.uk/blogs/opensecrets/2010/01/mot_failure_rates_released.html

Statistics in Excel format here:
http://www.bbc.co.uk/blogs/opensecrets/MOT_Make_Model_Comp_2007.xls

Shows data from 2007.
 
Wow, a very useful bit of info!

Also - gives you a good idea of how many of each car there is on the road (assuming, of course, that the car is MOT'd within that year)
 
Nicely done PMKeates, summary sheet is good too.

Surprising about the lack of failures for the supercar manufacturers, you would almost expect them to be up there with the most failures...is that because they're barely driven/looked after meticulously with no expense spared or are the genuinely pretty well made nowadays? I'd like to think it was the latter given their cost but imagine it's more the former!
 
I've done a total for each column, plus percentages for each failure type.


MOT_Comp_Total_Percentages.png
 
This is a hugely useful but enormous dataset. Given time and the right analytical skills people will be able to produce very useful and intersting tables from it.

I'll kick off with some lulz for more than half of the 97 Passats failing an MOT.

Although obviously the sort of cars owned by dunderheads who never change tyres etc etc will have skewed results which may make them look unreliable - but in time we can break the data down, I wonder what proportion of the Passats were just falling to bits versus Corollas with only a bald tyre..
 
If these were all done by the same team of people working to the same set of processes and standards it would be more valuable but as we all know the fact is the variances in quality of service will have an impact on these statistics....though they still have value.
 
It will have quite a few errors and cars grouped into the wrong place and we'll need to be careful to strip away the failure things which are because of stupid owners not cruddy cars if we are going to judge reliability.

Interesting to see lots of small hatchbacks - '1 lady owner from new' no doubt?

And shocking how many cars fail on brakes!
 
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