2021 Kia Proceed Gt-Line S Isg S-A — MOT failures & pass rate

Across 455 MOT tests analysed for the 2021 Kia Proceed Gt-Line S Isg S-A, the most common recorded failure areas were tyres, visibility and brakes. Its pass rate of 87.7% was below the average for cars of a similar age (91.2%).

Pass rate

455

MOT tests analysed

12.3%

Fail rate

worse than

vs cars of similar age

3.5

Avg age at test (yrs)

How it compares

Fail rate for this model-year against the segment and national averages for cars of a similar age.

Top failure categories

Most common MOT failure areas — 2021 Kia Proceed Gt-Line S Isg S-A
#	Category	% of tests affected	Tests
1	Tyres	7.0%	32
2	Visibility	3.1%	14
3	Brakes	2.6%	12
4	Lighting & signalling	2.2%	10
5	Suspension	1.3%	6
6	Other defects	0.4%	2

Percentage of tests with at least one failure recorded in each category.

Most common specific failures

The exact components most often recorded as failures — more specific than the categories above.

Most frequently recorded failure items — 2021 Kia Proceed Gt-Line S Isg S-A
#	Failure item	Times recorded
1	Wipers	16
2	Tread depth	9
3	Pins and bushes	9
4	Brake pads	8
5	Headlamp aim	8
6	Service brake performance	4

Top advisory categories

Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.

Most common MOT advisories — 2021 Kia Proceed Gt-Line S Isg S-A
#	Category	% of tests with advisory	Tests
1	Tyres	26.6%	121
2	Brakes	15.6%	71
3	Other defects	8.1%	37
4	Suspension	6.2%	28
5	Visibility	2.9%	13
6	Road wheels	1.1%	5

Failure rate by mileage

Higher-mileage cars tend to fail more — often the most useful guide to real condition.

MOT fail rate by recorded mileage band.

Fail rate by recorded mileage — 2021 Proceed Gt-Line S Isg S-A
Mileage band	Tests	Fail rate
0-30k	258	9.7%
30-60k	176	16.5%

Failure rate by age

How this model-year's MOT fail rate climbs as the cars get older.

Trend over time

Fail rate by dataset year — 2021 Proceed Gt-Line S Isg S-A
Dataset year	Tests	Fail rate
2024	220	9.6%
2025	233	15.0%

What to check before buying a 2021 Proceed Gt-Line S Isg S-A

Before buying a 2021 Kia Proceed Gt-Line S Isg S-A, focus on the areas it most often fails on. Tyres accounted for 7.0% of tests for this year.

Tyres (7.0% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
Visibility (3.1% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£150.
Brakes (2.6% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.

Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.

Frequently asked questions

How many 2021 Kia Proceed Gt-Line S Isg S-As pass their MOT?

87.7% of the 455 2021 Kia Proceed Gt-Line S Isg S-A MOT tests in this dataset passed — a 12.3% fail rate.

What is the most common MOT failure on a 2021 Kia Proceed Gt-Line S Isg S-A?

Tyres, recorded in 7.0% of tests, followed by visibility (3.1%).

Does the 2021 Proceed Gt-Line S Isg S-A get worse with mileage?

Its MOT fail rate rises from 9.7% in the 0-30k band to 16.5% in the 30-60k band.

Methodology & source. Based on 455 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.