Graphical statistics of head gasket failures on the MGF. These graphs cannot be taken as accurate or representative, they are composed only of those failures reported by internet users at http://shame.4mg.com.

The raw data I use to calculate these graphs is at the bottom of the page. Note, many entries in the HOS are not complete, I have used all data available to make up the following graphs, any apparent inconsistencies are due to lack of data, ie: numbers of cars counted in age and milage differ because of missing data.


Failures per month, these do not include the few Australian and New Zealand cars in the list to try and show seasonal variations.

1998
Jan

No Data

Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1 2 3 4 5 6 7 8
1999
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1 2 3 4 5 6 7 8
2000
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1 2 3 4 5 6 7 8
2001
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1 2 3 4 5 6 7 8
2002
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1 2 3 4 5 6 7 8
Combined
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

 

 

Number of HGF per year of manufacture
1995
1996
1997
1998
1999
2000
2001
02 04 06 08 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70

 

Mean milage at failure
Year of car
1995 11 36,636 1
1996 47 37,921 5 51,850
1997 67 31,857 5 31,340
1998 39 32,030 4 53,500
1999 4 25,175 0
2000 5 22,360 0
2001 4 15,960 0
all years combined (including entries with no year of manufacture) 205 31,440 16 42,497
No. with 1 HGF mean miles at 1st HGF No. with 2 HGF mean miles at 2nd HGF
Mean age at failure
Year of car    
1995 6 24
1996 35 45.4
1997 59 36
1998 36 33.36
1999 3 29
2000 4 14.75
2001 4 15
all years combined (including entries with no milage) 160 35
  No. with 1 HGF mean age at 1st HGF (in months)

 

Raw Data Below

 

Number of 1995 cars with one HGF - 11
Number of cars with two or more HGF - 1
Mean mileage to first HGF - 36,636
Mean milage to second HGF
Mean age of car at failure - 24 months

Total mileage to 1st HGF - 402,996
Total mileage to second HGF -

cars counted in age - 6
total age of cars - 145

Number of 1996 cars with one HGF - 47
Number of cars with two or more HGF - 5
Mean mileage to first HGF - 37,921
Mean milage to second HGF - 51,850
Mean age of car at failure - 45.4 months

Total mileage to 1st HGF - 1,782,303
Total mileage to second HGF - 259,250

cars counted in age - 35
total age of cars - 1592

Number of 1997 cars with one HGF - 67
Number of cars with two or more HGF - 5
Mean mileage to first HGF - 31,587
Mean milage to second HGF - 31,340
Mean age of car at failure - 36 months

Total mileage to 1st HGF - 2,116,350
Total mileage to second HGF - 156,700

cars counted in age - 59
total age of cars - 2124

Number of 1998 cars with one HGF - 39
Number of cars with two or more HGF - 4
Mean mileage to first HGF - 32,030
Mean milage to second HGF - 53,500
Mean age of car at failure - 33.36  months

Total mileage to 1st HGF - 1,204,150
Total mileage to second HGF - 214,000

cars counted in age - 36
total age of cars - 1201

Number of 1999 cars with one HGF - 4
Number of cars with two or more HGF - 0
Mean mileage to first HGF - 25,175
Mean milage to second HGF
Mean age of car at failure - 29 months

Total mileage to 1st HGF - 100,700
Total mileage to second HGF -

cars counted in age - 3
total age of cars - 116

Number of 2000 cars with one HGF - 5
Number of cars with two or more HGF - 0
Mean mileage to first HGF - 22,360
Mean milage to second HGF -
Mean age of car at failure - 14.75 months

Total mileage to 1st HGF - 111,800
Total mileage to second HGF -

cars counted in age - 4
total age of cars - 59

Number of 2001 cars with one HGF - 4
Number of cars with two or more HGF - 0
Mean mileage to first HGF - 15,960
Mean milage to second HGF
Mean age of car at failure - 15 months

Total mileage to 1st HGF - 63,843
Total mileage to second HGF -

cars counted in age - 4
total age of cars - 60

  Number of unknown year cars with one HGF - 28
Mean mileage to first HGF - 23,573
Mean age of car at failure - 24 months

Total mileage to 1st HGF - 660,050

cars counted in age - 13
total age of cars - 310

  Total Milage to 1st Failure - 6,445,192
Number with 1st failure - 205
Average - 31,440

Total age at 1st failure - 5607
Number with 1st failure - 160
Average - 35 months

Total Milage to 2nd Failure - 679950
Number with 2nd failure - 16
Average - 42497

Total age at 2nd failure - 451
Number with 2nd failure - 11
Average - 41 months