MOT Failure Statistics

[Nik_Endeavour]

Not a single Merc in sight!

BBC - Open Secrets: MOT failure rates released

 

[kth286]

He admits he has limited it to the most popular models, those that produced over 20,000 tests in 2007 for a particular model.

 

[Sp!ke]

He admits he has limited it to the most popular models, those that produced over 20,000 tests in 2007 for a particular model.

Look at this full excel spreadsheet for more data.

http://www.mediafire.com/file/umnynygrgxm/MOT

Interesting that one can use this data to see how many cars of a particular model are in use in the UK. (nice)

For instance, only 90 E500's apparently

 

[Howard]

Spike , how can you tell there are only 90 ?

 

[Sp!ke]

This is data for clk 430's


passes 926
fails 282

 

[Howard]

You read my mind ... how do you come up with the figures though ....

 

[Sp!ke]

just look at the second worksheet in the spreadsheet, select the car and total the numbers.

 

[Howard]

Didn't realise there was a second sheet

Thanks

 

[wemorgan]

It seems that brakes, lights and tyres account for ~90% of failures.
Basic DIY checks really. Rather worrying how many poorly maintained cars are on the road.

edit: Also the % failures by London taxis Int is rather high. Nice to know professional drivers are taking care of their cars. With 20-25% of them failing due to suspension or steering issues.

 

[wemorgan]

Too much time on my hands clearly:

Top 10 MB (tests>1000)

MAKE,MODEL,FIRST_USE,PASS,FAIL,TESTS,RATE

MERCEDES,SL 350,2004,"1,257",158,1415,11.2%
MERCEDES,SLK 200K,2004,"1,730",252,1982,12.7%
MERCEDES,SLK 350,2004,907,139,1046,13.3%
MERCEDES,SL 500,2003,"1,229",197,1426,13.8%
MERCEDES,E 240,2004,869,141,1010,14.0%
MERCEDES,A 140,2004,"4,352",721,5073,14.2%
MERCEDES,A 160,2004,"1,554",258,1812,14.2%
MERCEDES,C 240,2002,"1,068",181,1249,14.5%
MERCEDES,SL 350,2003,"1,000",174,1174,14.8%
MERCEDES,SLK 320,2001,882,159,1041,15.3%

Bottom 10 (tests>1000)

MAKE,MODEL,FIRST_USE,PASS,FAIL,TESTS,RATE

MERCEDES,208 D,1996,775,933,1708,54.6%
MERCEDES,208 D,1995,482,566,1048,54.0%
MERCEDES,VITO,1997,"1,109","1,250",2359,53.0%
MERCEDES,VITO,1998,"2,054","2,238",4292,52.1%
MERCEDES,208 D,1997,640,655,1295,50.6%
MERCEDES,SPRINTER,1997,560,564,1124,50.2%
MERCEDES,VITO,1999,"2,435","2,389",4824,49.5%
MERCEDES,VITO,2000,"3,200","2,782",5982,46.5%
MERCEDES,SPRINTER,1998,700,544,1244,43.7%
MERCEDES,190 E,1988,809,595,1404,42.4%

 

[jaymanek]

older vans with high mileages.. what a surprise..

 

[d w124]

Too much time on my hands clearly:

Top 10 MB (tests>1000)

MAKE,MODEL,FIRST_USE,PASS,FAIL,TESTS,RATE

MERCEDES,SL 350,2004,"1,257",158,1415,11.2%
MERCEDES,SLK 200K,2004,"1,730",252,1982,12.7%
MERCEDES,SLK 350,2004,907,139,1046,13.3%
MERCEDES,SL 500,2003,"1,229",197,1426,13.8%
MERCEDES,E 240,2004,869,141,1010,14.0%
MERCEDES,A 140,2004,"4,352",721,5073,14.2%
MERCEDES,A 160,2004,"1,554",258,1812,14.2%
MERCEDES,C 240,2002,"1,068",181,1249,14.5%
MERCEDES,SL 350,2003,"1,000",174,1174,14.8%
MERCEDES,SLK 320,2001,882,159,1041,15.3%

Bottom 10 (tests>1000)

MAKE,MODEL,FIRST_USE,PASS,FAIL,TESTS,RATE

MERCEDES,208 D,1996,775,933,1708,54.6%
MERCEDES,208 D,1995,482,566,1048,54.0%
MERCEDES,VITO,1997,"1,109","1,250",2359,53.0%
MERCEDES,VITO,1998,"2,054","2,238",4292,52.1%
MERCEDES,208 D,1997,640,655,1295,50.6%
MERCEDES,SPRINTER,1997,560,564,1124,50.2%
MERCEDES,VITO,1999,"2,435","2,389",4824,49.5%
MERCEDES,VITO,2000,"3,200","2,782",5982,46.5%
MERCEDES,SPRINTER,1998,700,544,1244,43.7%
MERCEDES,190 E,1988,809,595,1404,42.4%

No w124s :bannana:

 

[jaymanek]

well i think that may be more down to data manipulation.

every W124 would be classed differently as they didnt have classes back then (A,B,C etc etc)
So on their records an early W124 may be a 230 or E230 or 230E, 200, 200E, E200 etc etc.. If you think of all the different ways in which they could be entered for an MOT, they wouldnt be able to group this data and as the above is only for a 1000 or more tests, a W124 wouldnt show up.

I hope that makes sense!

 

[d w124]

well i think that may be more down to data manipulation.

every W124 would be classed differently as they didnt have classes back then (A,B,C etc etc)
So on their records an early W124 may be a 230 or E230 or 230E, 200, 200E, E200 etc etc.. If you think of all the different ways in which they could be entered for an MOT, they wouldnt be able to group this data and as the above is only for a 1000 or more tests, a W124 wouldnt show up.

I hope that makes sense!

All facelifted cars are E class

 

[wemorgan]

No w124s :bannana:

As Jay said, the W124 is listed under many models and the >1000 test filter removed most old cars.

But for example here are the results of the 300D

MAKE,MODEL,FIRST_USE,PASS,FAIL,TESTS,RATE
MERCEDES,300 D,1993,268,122,390,31.3%
MERCEDES,300 D,1992,359,195,554,35.2%
MERCEDES,300 D,1991,221,113,334,33.8%
MERCEDES,300 D,1990,293,167,460,36.3%
MERCEDES,300 D,1989,152,105,257,40.9%
MERCEDES,300 D,1988,103,54,157,34.4%
MERCEDES,300 D,1987,87,53,140,37.9%

the major reasons for failure are the usual brakes and lights, but very rarely tyres. Suspension issues account for ~10% failures.

 

[Swiss Toni]

MBClub Annorak required....

just look at the second worksheet in the spreadsheet, select the car and total the numbers.

Not sure how this can be too reliable (I have been looking at the W113 figures...!)

Presumably, because the figures are for tests completed, not unique vehicles, a car can fail a few times, then pass or fail and be scrapped (so will not appear on the pass figures?)

Is there any way to manipulate the figures around that?

 

[Sp!ke]

For the data to be in any way accurate it would have to be based on the cars first MOT rather than its retest.

Otherwise you could have a single car failing multiple times completely skewing the figures.

 

[Swiss Toni]

But we can reasonably expect that few cars passed an MOT more than once, so to use the pass figures as an indication of the number in use on the road seems fair?

 

[Sonny Burnett]

at the end of the day you can post this stuff all day but all you gotta do is look after your car check you lights, tires and fluids...

 

[Sp!ke]

But we can reasonably expect that few cars passed an MOT more than once, so to use the pass figures as an indication of the number in use on the road seems fair?

I would guess so.

Looking at the numbers, they dont look an awful lot different than i'd expect.

Look at SL600's for an example - less than 110 (129 SL's) nationwide. Finger in the air style, that sounds about right I recon.