CARMOTIQ Model Research Report
Citroen C3
2016–2021
Unlike a registration check, this report analyses how thousands of similar Citroen C3 models have performed at MOT over time—not just one vehicle.
This report analyses 507,446 official UK MOT tests and more than 706,429 recorded defect notes for Citroen C3 models first registered between 2016 and 2021. It reveals common faults, MOT pass rates and maintenance trends to help you research the model before you buy.
Report Dataset
- Official UK DVSA MOT tests analysed
- 507,446
- Recorded defect notes
- 706,429
- Registration era
- 2016–2021
- Coverage
- United Kingdom
- Snapshot
- 31 July 2026
- Research method
- Aggregated model-level MOT analysis
MOT pass rate
85.2%
of MOT tests passed
MOT tests analysed
507,446
Defect notes recorded
706,429
Key Findings
Citroen C3 (2016–2021)
- 85.2% MOT pass rate across 507,446 tests.
- 57% of recorded defect notes relate to owner maintenance.
- Tyres account for the largest volume of recorded MOT issues.
- Exhaust system insecure bracket is the most common recurring systemic issue in this extract.
- Headlamp alignment appears throughout the vehicle's life, from low to higher mileages.
Citroen C3 Research Summary
Based on over 507,446 official UK MOT tests, Citroen C3 models registered between 2016 and 2021 achieve a strong 85.2% MOT pass rate.
The majority of recorded MOT defects relate to routine owner maintenance, with tyres, lighting and washer systems accounting for most common faults seen on used examples in this age band.
Recurring systemic faults occur far less frequently, although exhaust system insecure bracket appears consistently across the dataset.
Overall, the data suggests that this generation of Citroen C3 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 Citroen C3 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 Citroen C3 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 Citroen C3 in this age band (not MOT tests and not number of vehicles).
- Owner maintenance
56.6% · 399,516
defect notes
- Wear & tear
23.1% · 162,957
defect notes
- Systemic
3.2% · 22,509
defect notes
- Other
17.2% · 121,447
defect notes
Severity mix
How those defect notes were graded — advisory, minor, major or dangerous — summed across categories for this model band.
Advisory
574,302
defect notes
Minor
26,715
defect notes
Major
79,828
defect notes
Dangerous
25,584
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
- 116,981 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
Headlamp aim too low
- Recorded
- 8,025 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
Windscreen washer not working
- Recorded
- 6,040 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
Side repeater slightly discoloured
- Recorded
- 4,254 MOT defect notes
- DVSA code
- 4.4.3 (a)
What it means
An indicator repeater lens is faded or discoloured, which can reduce how clearly your signal is seen.
Why it happens
UV exposure and age bleach plastic lenses, especially on higher-mileage cars.
Buyer tip
Budget for a replacement repeater lens — usually a cheap fix compared with a failed test.
Severity
Usually maintenance related
Headlamp aim projected beam image is obviously incorrect
- Recorded
- 2,750 MOT defect notes
- DVSA code
- 4.1.2 (c)
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
Tyre pressure monitoring system malfunctioning or obviously inoperative
- Recorded
- 1,652 MOT defect notes
- DVSA code
- 5.2.3 (h)
What it means
The tyre pressure monitoring system is reporting a fault or is clearly not working, so you may not get a dashboard warning of under-inflation.
Why it happens
Flat battery sensors after tyre changes, damaged valves or control-module faults are common.
Buyer tip
Confirm whether sensors need replacing after recent tyre or wheel work, and check pressures manually anyway.
Severity
Usually maintenance related
Shock absorbers has light misting of oil
- Recorded
- 1,099 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
Headlamp insecure
- Recorded
- 1,055 MOT defect notes
- DVSA code
- 4.1.1 (c)
What it means
The headlamp unit is not held firmly in place. Vibration can move the beam and leave you with poor night visibility or dazzle for other drivers.
Why it happens
Mounting clips, brackets or crash-related repairs can leave the lamp unit loose.
Buyer tip
Inspect the lamp mounts and any crash repairs around the front end before you buy.
Severity
Usually maintenance related
Most Common Wear & Tear Faults
DVSA wording grouped as wear and tear for this model and age band.
Exhaust emissions likely to be affected by an exhaust leak
- Recorded
- 382 MOT defect notes
- DVSA code
- 8.2.1.1 (b)
What it means
Emissions could not be completed cleanly, or a leak is likely to upset the reading. Common causes include exhaust leaks, misfires, DPF issues or an engine that will not idle correctly.
Why it happens
Leaks before the sample point, misfires, DPF problems or unstable idle prevent a valid emissions result.
Buyer tip
Listen for blow-by at joints, check for recent exhaust/DPF work, and avoid cars that need “easier” emissions excuses.
Severity
Usually wear related
Exhaust emissions likely to be affected by an exhaust leak
- Recorded
- 115 MOT defect notes
- DVSA code
- 8.2.2.1 (b)
What it means
Emissions could not be completed cleanly, or a leak is likely to upset the reading. Common causes include exhaust leaks, misfires, DPF issues or an engine that will not idle correctly.
Why it happens
Leaks before the sample point, misfires, DPF problems or unstable idle prevent a valid emissions result.
Buyer tip
Listen for blow-by at joints, check for recent exhaust/DPF work, and avoid cars that need “easier” emissions excuses.
Severity
Usually wear related
Emissions not tested due to exhaust leak
- Recorded
- 85 MOT defect notes
- DVSA code
- 8.2.1.2 (d)
What it means
Emissions could not be completed cleanly, or a leak is likely to upset the reading. Common causes include exhaust leaks, misfires, DPF issues or an engine that will not idle correctly.
Why it happens
Leaks before the sample point, misfires, DPF problems or unstable idle prevent a valid emissions result.
Buyer tip
Listen for blow-by at joints, check for recent exhaust/DPF work, and avoid cars that need “easier” emissions excuses.
Severity
Usually wear related
Exhaust mounting defective exhaust corroded
- Recorded
- 52 MOT defect notes
- DVSA code
- 6.1.2 (a)
What it means
An exhaust mount is worn or the system is insecure/leaking. That can worsen noise, fumes and later emissions failures.
Why it happens
Rubber hangers perish and joints loosen with heat cycles and corrosion.
Buyer tip
Look under the car for hanging sections, cracked rubbers and sooty leak marks at joints.
Severity
Usually wear related
Shock absorbers has an excessively worn bush
- Recorded
- 22 MOT defect notes
- DVSA code
- 5.3.2 (c)
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 wear related
Service brake excessively binding Bearing not tested.
- Recorded
- 18 MOT defect notes
- DVSA code
- 1.2.1 (f)
What it means
Service brake performance could not be fully verified, or a brake is binding/fluctuating. That often points to worn discs, seized calipers or hub issues.
Why it happens
Seized caliper slides, worn discs or contaminated friction material upset brake balance.
Buyer tip
Insist on a road test and a proper brake inspection; unresolved binding can destroy pads and hubs.
Severity
Usually wear related
Emissions unable to be completed Exhaust Leak
- Recorded
- 8 MOT defect notes
- DVSA code
- 8.2.2.2 (e)
What it means
Emissions could not be completed cleanly, or a leak is likely to upset the reading. Common causes include exhaust leaks, misfires, DPF issues or an engine that will not idle correctly.
Why it happens
Leaks before the sample point, misfires, DPF problems or unstable idle prevent a valid emissions result.
Buyer tip
Listen for blow-by at joints, check for recent exhaust/DPF work, and avoid cars that need “easier” emissions excuses.
Severity
Usually wear related
Service brake fluctuating, but not excessively discs scored
- Recorded
- 7 MOT defect notes
- DVSA code
- 1.2.1 (e)
What it means
Service brake performance could not be fully verified, or a brake is binding/fluctuating. That often points to worn discs, seized calipers or hub issues.
Why it happens
Seized caliper slides, worn discs or contaminated friction material upset brake balance.
Buyer tip
Insist on a road test and a proper brake inspection; unresolved binding can destroy pads and hubs.
Severity
Usually wear related
Most Common Systemic Faults
DVSA wording grouped as systemic patterns for this model and age band.
Exhaust system insecure bracket
- Recorded
- 2,515 MOT defect notes
- DVSA code
- 6.1.2 (a)
What it means
An exhaust mount is worn or the system is insecure/leaking. That can worsen noise, fumes and later emissions failures.
Why it happens
Rubber hangers perish and joints loosen with heat cycles and corrosion.
Buyer tip
Look under the car for hanging sections, cracked rubbers and sooty leak marks at joints.
Severity
Often a recurring model pattern
Engine MIL inoperative or indicates a malfunction
- Recorded
- 1,220 MOT defect notes
- DVSA code
- 8.2.1.2 (h)
What it means
The engine management warning lamp is on or not working. Stored faults can affect emissions, drivability and future MOT results.
Why it happens
Sensors, emissions equipment or wiring faults store codes that illuminate the MIL.
Buyer tip
Ask for a diagnostic printout and proof that the underlying fault — not just the lamp — was fixed.
Severity
Often a recurring model pattern
Brake pipe excessively damaged
- Recorded
- 840 MOT defect notes
- DVSA code
- 1.1.11 (c)
What it means
A brake pipe is damaged or heavily corroded. Pipe failure can cause sudden loss of braking effort.
Why it happens
Road salt, stone chips and age corrode metal pipes, especially along the underbody.
Buyer tip
Inspect metal pipes along the underbody and near calipers; corroded pipes should be replaced before you rely on the car.
Severity
Often a recurring model pattern
Engine MIL inoperative or indicates a malfunction
- Recorded
- 424 MOT defect notes
- DVSA code
- 8.2.2.2 (g)
What it means
The engine management warning lamp is on or not working. Stored faults can affect emissions, drivability and future MOT results.
Why it happens
Sensors, emissions equipment or wiring faults store codes that illuminate the MIL.
Buyer tip
Ask for a diagnostic printout and proof that the underlying fault — not just the lamp — was fixed.
Severity
Often a recurring model pattern
Registration plate deteriorated but not likely to be misread Cracked
- Recorded
- 66 MOT defect notes
- DVSA code
- 0.1 (b)
What it means
The number plate is cracked, deteriorated or hard to read. Plates must remain legible and securely fitted.
Why it happens
Age, stone chips, poor replacements or mounts that flex crack or fade plates.
Buyer tip
Budget for legal replacement plates; check fixing and any bike-rack or tow-bar obstruction.
Severity
Often a recurring model pattern
Emissions not tested Engine Rattle
- Recorded
- 43 MOT defect notes
- DVSA code
- 8.2.1.2 (d)
What it means
Emissions could not be completed cleanly, or a leak is likely to upset the reading. Common causes include exhaust leaks, misfires, DPF issues or an engine that will not idle correctly.
Why it happens
Leaks before the sample point, misfires, DPF problems or unstable idle prevent a valid emissions result.
Buyer tip
Listen for blow-by at joints, check for recent exhaust/DPF work, and avoid cars that need “easier” emissions excuses.
Severity
Often a recurring model pattern
Steering linkage fouling
- Recorded
- 25 MOT defect notes
- DVSA code
- 2.1.4 (a)
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
When similar DVSA wording appears across many examples, it can reflect shared components or recurring model tendencies rather than one careless owner.
Buyer tip
Ask the seller for invoices covering this item, and have an independent inspector confirm whether it is still present.
Severity
Often a recurring model pattern
Exhaust emissions - engine idle speed too high
- Recorded
- 15 MOT defect notes
- DVSA code
- 8.2.1.2 (e)
What it means
Emissions could not be completed cleanly, or a leak is likely to upset the reading. Common causes include exhaust leaks, misfires, DPF issues or an engine that will not idle correctly.
Why it happens
Leaks before the sample point, misfires, DPF problems or unstable idle prevent a valid emissions result.
Buyer tip
Listen for blow-by at joints, check for recent exhaust/DPF work, and avoid cars that need “easier” emissions excuses.
Severity
Often a recurring model pattern
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 | |
| 2021 | 35,813 | 12,515 | 1,323 | 8,073 |
| 2022 | 56,440 | 21,147 | 2,167 | 12,982 |
| 2023 | 69,834 | 28,859 | 3,472 | 18,236 |
| 2024 | 85,400 | 36,004 | 5,247 | 26,050 |
| 2025 | 90,890 | 40,289 | 6,441 | 32,022 |
| 2026 | 37,405 | 16,966 | 2,961 | 14,550 |
Buying a used Citroen C3: 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 Citroen C3 MOT pass rate for 2016–2021?
- In this extract, Citroen C3 shows a 85.2% MOT pass rate across 507,446 recorded DVSA tests.
- What drives most Citroen C3 MOT defect notes?
- About 57% 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 Citroen C3 model in a fixed UK registration age band so you can research the model before you shortlist cars.