CARMOTIQ Model Research Report
BYD Atto
2021–2026
The BYD Atto MOT pass rate for cars first registered 2021–2026 is 92.4% across 912 official UK DVSA tests. This report then covers more than 536 recorded defect notes for BYD Atto models in that registration band. It shows common faults, MOT pass rates and maintenance trends to help you research the model before you buy.
Unlike a registration check, this report analyses how thousands of similar BYD Atto models have performed at MOT over time—not just one vehicle.
Report Dataset
- Official UK DVSA MOT tests analysed
- 912
- Recorded defect notes
- 536
- Registration era
- 2021–2026
- Coverage
- United Kingdom
- Snapshot
- 17 August 2026
- Research method
- Aggregated model-level MOT analysis
MOT pass rate
92.4%
of MOT tests passed
MOT tests analysed
912
Defect notes recorded
536
Key Findings
BYD Atto (2021–2026)
- 92.4% MOT pass rate across 912 tests.
- 82% of recorded defect notes relate to owner maintenance.
- Tyres account for the largest volume of recorded MOT issues.
- Headlamp alignment appears throughout the vehicle's life, from low to higher mileages.
BYD Atto Research Summary
Based on over 912 official UK MOT tests, BYD Atto models registered between 2021 and 2026 achieve a strong 92.4% MOT pass rate.
The overwhelming majority of recorded MOT defects relate to routine owner maintenance, with tyres, dampers and washer systems accounting for most common faults seen on used examples in this age band.
Recurring systemic faults occur far less frequently in this extract.
Overall, the data suggests that this generation of BYD Atto is more likely to fail MOT due to maintenance items than widespread design faults, making service history and routine upkeep particularly important when buying used. Shoppers comparing a used BYD Atto should treat this research summary as model-level context before inspecting any individual car.
What this doesn't tell you
This report describes model-level MOT trends, not the condition of any individual vehicle.
Two identical BYD Atto models can have very different maintenance histories.
Use this report to understand common patterns before inspecting a specific car.
How we classify MOT faults
We group recorded DVSA defect wording into four research categories to help identify whether issues are more likely to reflect routine maintenance, expected wear, recurring model patterns or miscellaneous inspection outcomes.
- Owner maintenance
- Defects often linked to day-to-day upkeep — for example tyres, lamps, washers and other items a careful owner can usually prevent or fix promptly.
- Wear & tear
- Age- and mileage-related deterioration that accumulates with normal use, even when a car has been looked after.
- Systemic
- Recurring wording and patterns that appear across the model fleet and may point to design, component or known-model tendencies rather than one careless owner.
- Other
- Inspection outcomes that do not sit cleanly in the three groups above, including mixed or less classifiable defect notes.
How MOT failures break down
Share of recorded defect notes by category for BYD Atto in this age band (not MOT tests and not number of vehicles).
- Owner maintenance
82.5% · 442
defect notes
- Wear & tear
7.6% · 41
defect notes
- Systemic
1.5% · 8
defect notes
- Other
8.4% · 45
defect notes
Severity mix
How those defect notes were graded — advisory, minor, major or dangerous — summed across categories for this model band.
Advisory
428
defect notes
Minor
34
defect notes
Major
39
defect notes
Dangerous
35
defect notes
Most Common Owner-Maintenance Faults
DVSA wording grouped as owner maintenance for this model and age band.
Tyre worn close to legal limit/worn on edge
- Recorded
- 183 MOT defect notes
- DVSA code
- 5.2.3 (e)
What it means
Tread is close to (or at) the legal minimum, or wear is concentrated on an edge. That often points to alignment, pressure or suspension issues as well as simple age.
Why it happens
Under-inflation, poor alignment, aggressive driving or simply delayed replacement push tread below a safe/legal profile.
Buyer tip
Measure tread across the full width, check tyre age (DOT date) and look for uneven inner-edge wear.
Severity
Usually maintenance related
Shock absorbers has light misting of oil
- Recorded
- 31 MOT defect notes
- DVSA code
- 5.3.2 (b)
What it means
A damper mounting bush is worn, which can cause knocks, vague handling and accelerated tyre wear.
Why it happens
Rubber bushes harden and tear with age, road salt and repeated suspension movement.
Buyer tip
Listen for clunks over speed bumps and have a mechanic check top mounts and lower bushes.
Severity
Usually maintenance related
Windscreen washer not working
- Recorded
- 15 MOT defect notes
- DVSA code
- 3.5 (a)
What it means
Washer jets are not delivering fluid. Testers need a clear screen; empty reservoirs, blocked jets or failed pumps are common.
Why it happens
Empty bottles, frozen/blocked jets, split pipes or a failed pump stop fluid reaching the screen.
Buyer tip
Top up fluid, test the jets on the driveway, and check for cracked bottles or split pipes in the engine bay.
Severity
Usually maintenance related
Headlamp aim too low
- Recorded
- 7 MOT defect notes
- DVSA code
- 4.1.2 (a)
What it means
This MOT defect usually indicates incorrect headlamp alignment following adjustment, suspension movement or repair work.
Why it happens
Aim drifts after suspension work, bumper repairs, bulb changes or simply from road vibration over time.
Buyer tip
Check beam alignment during inspection and ask whether the lamps were aimed after any recent suspension or bodywork.
Severity
Usually maintenance related
Supplementary restraint system warning lamp indicates a fault
- Recorded
- 6 MOT defect notes
- DVSA code
- 7.1.6 (a)
What it means
The airbag/SRS warning lamp indicates a fault. Restraint systems may not deploy correctly in a collision.
Why it happens
Clock-spring, sensor or module faults — sometimes after prior accident repairs — set SRS warnings.
Buyer tip
Require a specialist SRS diagnosis — do not accept a bulb removed or lamp covered up.
Severity
Usually maintenance related
Tyre obviously under inflated
- Recorded
- 2 MOT defect notes
- DVSA code
- 5.2.3 (l)
What it means
This wording appears on DVSA MOT records for this model. It flags a tester-observed defect or advisory that can affect safety, legality or a future pass.
Why it happens
These issues often build up when routine checks are skipped between services — tyres, lamps and washers are typical examples.
Buyer tip
Ask the seller for invoices covering this item, and have an independent inspector confirm whether it is still present.
Severity
Usually maintenance related
Rear Seat belt webbing slightly damaged or frayed
- Recorded
- 1 MOT defect notes
- DVSA code
- 7.1.2 (b)
What it means
Seat-belt webbing is frayed or lightly damaged, which can weaken the belt in a crash.
Why it happens
Abrasion at guides, trapped belts or age fray the webbing fibres.
Buyer tip
Pull each belt fully out and inspect for cuts, fraying and weak retraction.
Severity
Usually maintenance related
Steering column universal joint has slight wear or play intermediate shaft.
- Recorded
- 1 MOT defect notes
- DVSA code
- 2.2.2 (c)
What it means
Play or wear in a steering-column joint can feel like vagueness or a knock through the wheel.
Why it happens
Intermediate shaft joints wear with mileage and can develop free play.
Buyer tip
Have a technician check column UJs and intermediate shafts if you feel notchiness.
Severity
Usually maintenance related
Most Common Wear & Tear Faults
DVSA wording grouped as wear and tear for this model and age band.
No wear-and-tear items in this extract.
Most Common Systemic Faults
DVSA wording grouped as systemic patterns for this model and age band.
No systemic items in this extract.
Recent year-by-year category counts
Defect-note totals by calendar year in the serving extract (not MOT tests, not vehicles, and not a prediction).
| Year | Owner maintenance | Wear & tear | Systemic | Other |
|---|---|---|---|---|
| defect notes | defect notes | defect notes | defect notes | |
| 2024 | 46 | 0 | 2 | 3 |
| 2025 | 167 | 8 | 2 | 16 |
| 2026 | 229 | 33 | 4 | 26 |
Buying a used BYD Atto: practical MOT checks
- Measure tyre tread across the full width and check age (DOT date) before you buy.
- Ask for a full service history that matches the mileage.
- Compare this model with a peer in the same age band, not against a single registration check alone.
- Confirm any warning lamps (engine management, ABS, SRS) are investigated, not just cleared.
Frequently asked questions
- What is the BYD Atto MOT pass rate for 2021–2026?
- In this extract, BYD Atto shows a 92.4% MOT pass rate across 912 recorded DVSA tests.
- What drives most BYD Atto MOT defect notes?
- About 82% of recorded defect notes are classed as owner maintenance, with tyres among the highest-volume items.
- Is this the same as checking one registration on GOV.UK?
- No. GOV.UK shows one vehicle. This page aggregates MOT outcomes for the BYD Atto model in a fixed UK registration age band so you can research the model before you shortlist cars.