MOT cost .

Failure category

Structure & seat-belts

Seat-belt anchorages, sub-frame integrity, vehicle structure corroded enough to lose rigidity. Less common, but the most expensive when they hit.

Defect codes

20

Total fails

89,122

Defect codes in this category, ranked.

Sorted by total cars affected last year. Click any row for the full defect description plus the models most at risk.

  1. 01

    Vehicle structure corroded to the extent that the rigidity of the assembly is seriously reduced

    74 models affected

    40,854
  2. 02

    The strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired

    75 models affected

    22,688
  3. 03

    Body, cab or chassis excessively corroded at a mounting point

    51 models affected

    18,240
  4. 04

    Vehicle structure corroded to the extent that the rigidity of the assembly is seriously reduced

    17 models affected

    4,753
  5. 05

    Seat belt buckle missing, damaged or not functioning as intended

    116 models affected

    1,044
  6. 06

    Seat belt not functioning as intended or of an incorrect type

    48 models affected

    744
  7. 07

    Seat belt retractor not functioning as intended

    11 models affected

    424
  8. 08

    A seat belt webbing or flexible stalk significantly stretched or weakened

    16 models affected

    196
  9. 09

    A body panel or body component damaged or corroded and likely to cause injury when grazed or contacted, or insecure

    3 models affected

    45
  10. 10

    A body panel or body component damaged or corroded and likely to cause injury when grazed or contacted, or insecure

    3 models affected

    42
  11. 11

    A spoke missing, cracked, excessively loose, bent or corroded

    3 models affected

    25
  12. 12

    Seat belt buckle missing, damaged or not functioning as intended

    4 models affected

    20
  13. 13

    A seat belt or flexible stalk damaged

    4 models affected

    14
  14. 14

    A passenger seat with a defective structure or the backrest cannot be secured in the upright position.

    3 models affected

    13
  15. 15

    Seat belt buckle missing, damaged or not functioning as intended

    2 models affected

    10
  16. 16

    A statutory seat belt missing

    1 models affected

    2
  17. 17

    A spoke missing, cracked, excessively loose, bent or corroded

    1 models affected

    2
  18. 18

    Joining/attachment plates or fastenings so insecure that structural rigidity is seriously reduced

    1 models affected

    2
  19. 19

    A body panel or body component damaged or corroded and likely to cause injury when grazed or contacted, or insecure

    1 models affected

    2
  20. 20

    A driver's seat with a defective structure

    1 models affected

    2

Brands most affected.

Total category-fails across each manufacturer's tested fleet. High-volume brands naturally lead — read alongside their model pass-rates.