STK Monitor 2025

Edition 2. Figures on Czech STK failures, based on open Ministry of Transport data covering 1 January 2025 through 31 December 2025.

Of the vehicles aged 3-5 years, 3,9% had a serious or dangerous defect. For vehicles aged 15-19 years, that share is 10,3%. The full tables are below and are free to cite with attribution.

Shifts compared with 2024

This edition (2025) compares Czech STK tests carried out in 2025 with tests from the previous year (2024). Both editions cover a single calendar year of testing.

Differences smaller than 1,0 percentage point fall within the normal year-on-year fluctuation and are not highlighted.

AgePrevious editionCurrent editionDifference
3-5 years3,7% (14 795/400 509)3,9% (14 514/376 071)+0,2 percentage point
6-8 years4,8% (33 712/705 242)4,9% (33 979/699 775)+0,1 percentage point
9-11 years6,3% (27 945/445 180)6,4% (30 085/470 243)+0,1 percentage point
12-14 years7,8% (45 136/579 575)8,1% (43 458/539 903)+0,3 percentage point
15-19 years9,8% (98 952/1 013 054)10,3% (95 852/930 191)+0,5 percentage point
CategoryPrevious editionCurrent editionDifference
Identification of the vehicle4,0%4,0%0,0 percentage point
Braking equipment19,6%19,6%0,0 percentage point
Steering7,7%7,7%0,0 percentage point
Visibility6,4%6,4%0,0 percentage point
Lighting equipment and parts of the electrical system18,3%18,3%0,0 percentage point

Models that shifted, by age group

3-5 years

  • New in the lowest defect share: Suzuki Vitara, Hyundai i20
  • Dropped from the lowest defect share: Toyota RAV4, Volkswagen Golf

6-8 years

  • New in the highest defect share: Fiat Ducato, Peugeot Boxer
  • Dropped from the highest defect share: Mercedes-Benz Sprinter, Citroen Jumper
  • New in the lowest defect share: Honda CR-V
  • Dropped from the lowest defect share: Volkswagen Golf Sportsvan

9-11 years

  • New in the highest defect share: Ford Transit Custom
  • Dropped from the highest defect share: Renault Megane
  • New in the lowest defect share: Volkswagen Golf Sportsvan, Seat Leon, Volkswagen Golf
  • Dropped from the lowest defect share: Skoda Citigo, Suzuki SX4, Skoda Yeti

12-14 years

  • New in the highest defect share: Citroen Berlingo, Fiat Ducato
  • Dropped from the highest defect share: Citroen C4 Picasso, Peugeot Partner
  • New in the lowest defect share: Audi A4
  • Dropped from the lowest defect share: Volkswagen Tiguan

Share of serious and dangerous defects by age group

Share of STK tests with at least one serious or dangerous defect (grade B or C), by vehicle age at the time of test. Based on the full Czech STK fleet.

AgeTestsWith B/C defectShare
3-5 years376 07114 5143,9%
6-8 years699 77533 9794,9%
9-11 years470 24330 0856,4%
12-14 years539 90343 4588,1%
15-19 years930 19195 85210,3%

Most common defect categories

Share of categorised defect items in this category, measured across the 108 models Plateop tracks. This is a share of defect items, not the chance that a vehicle fails the STK: a vehicle can have a defect for more than one reason at once.

CategoryWith B/C defectTestsShare
Chassis and chassis attachments17 836 97462 659 92128,5%
Braking equipment12 072 85361 486 97919,6%
Lighting equipment and parts of the electrical system11 438 16562 667 09118,3%
Axles, wheels, tyres, suspension10 595 23261 942 30417,1%
Steering4 534 32858 690 9917,7%
Visibility3 774 82559 282 6426,4%
Identification of the vehicle2 459 54062 004 9174,0%
Nuisance979 81056 698 7471,7%
Other equipment1 028 13160 983 0231,7%
Supplementary tests for passenger-carrying vehicles of categories M2 and M346 81444 879 2980,1%

Models with the lowest and highest defect shares

Per age group, the three models with the lowest and the highest share of serious or dangerous defects. Only models with at least 800 tests in that age group are included; small counts produce flukes and are therefore excluded.

3-5 years

Lowest defect share

ModelTestsShare
Suzuki Vitara1 2541,3%
Hyundai i201 0041,4%
Škoda Karoq11 1281,7%

Highest defect share

ModelTestsShare
Peugeot Boxer1 98110,7%
Fiat Ducato1 57510,1%
Citroen Jumper1 1608,8%

6-8 years

Lowest defect share

ModelTestsShare
Suzuki SX41 3511,8%
Suzuki Vitara4 5632,0%
Honda CR-V1 0132,2%

Highest defect share

ModelTestsShare
Fiat Ducato3 6918,8%
Peugeot Boxer3 6448,8%
Dacia Dokker6 2808,7%

9-11 years

Lowest defect share

ModelTestsShare
Volkswagen Golf Sportsvan1 3382,6%
Seat Leon1 4463,5%
Volkswagen Golf11 2744,0%

Highest defect share

ModelTestsShare
Dacia Dokker1 70111,9%
Ford Transit Custom1 39910,9%
Ford Transit3 26910,4%

12-14 years

Lowest defect share

ModelTestsShare
Skoda Citigo1 8494,1%
Audi A63 3324,9%
Audi A41 1574,9%

Highest defect share

ModelTestsShare
Ford Transit6 81613,7%
Citroen Berlingo1 67613,4%
Fiat Ducato2 32712,3%

Method and definitions

  • Source: open STK roadworthiness test data, Ministry of Transport, covering 1 January 2025 through 31 December 2025.
  • A test counts as a test with a defect when it had at least one grade B (serious, the vehicle may only continue conditionally) or grade C (dangerous, the vehicle may not continue) defect. Minor grade A defects never count; that makes Czech shares structurally lower than in countries that count every genuine defect.
  • The fleet figures per age group come from the full Czech STK fleet, not filtered by make or model.
  • The category and model figures are measured across the 108 models from 23 makes that Plateop tracks (643 data cells). That is broad but not the entire fleet; the fleet figures above are the reference for that.
  • Models only qualify as outliers with at least 800 tests in the age group concerned.
  • Editions are not changed after publication. This edition was compiled on 3 September 2026.

Year-on-year comparisons appear from the second frozen edition onward: every edition is frozen, so shifts can be demonstrated.

Using these figures

Free to cite with attribution; online, please include a link:

Source: Plateop STK Monitor, plateop.com/pers

All editions and method