Model Reports 8 min read Updated 12 Jul 2026 Pilot

Toyota Yaris 2018: reliability & common MOT faults

Elevated MOT failure patterns for the 2018 Toyota Yaris include Wheel bearings (rear) (~132.5× peers) and Side repeaters (~6.4× peers). Based on UK DVSA open data for test year 2025 (4,473 failed first-attempt tests), compared with similar age and mileage peers. Available test years: 2024, 2025.

4,473 failed first-attempt tests · 27,274 first tests (test year 2025)

Standout pattern: Wheel bearings (rear) — about 132.5× more often than on similar peer cars.

Key takeaways before you buy

  • Wheel bearings (rear): about 132.5× more often than similar cars
  • Side repeaters: about 6.4× more often than similar cars

Common faults

These are MOT failure patterns that show up more often on this registration year than on similar cars of the same class, age band, and mileage in the same test year (leave-one-out peer comparison; whole model family excluded).

Statistical patterns from MOT defect codes — not manufacturer TSBs, recalls, or a diagnosis of any individual car. Fail and advisory patterns are kept separate.

Based on 4,473 failed first-attempt tests in test year 2025.

Wheel bearings (rear)

This failure pattern appears about 132.5× more often than on similar peer cars — recorded on 915 failed first-attempt tests; 20.5% of failed tests for this model year.

Rear · 915 failures · ×132.5 vs similar cars · 20.5% of failed first tests · Strong pattern — appears far more often than similar cars

Side repeaters

This failure pattern appears about 6.4× more often than on similar peer cars — recorded on 294 failed first-attempt tests; 6.6% of failed tests for this model year.

Any · 294 failures · ×6.4 vs similar cars · 6.6% of failed first tests · Strong pattern — appears far more often than similar cars

# Fault pattern Location Failures vs similar cars Share of fails Confidence
1 Wheel bearings (rear)
Suspension > Wheel bearings
 Rear 915 ×132.5 20.5% Strong pattern — appears far more often than similar cars
2 Side repeaters
Lamps, reflectors and electrical equipment > Direction indicators > Flashing type > Side repeaters
 Any 294 ×6.4 6.6% Strong pattern — appears far more often than similar cars
3 Side repeaters (front)
Lamps, reflectors and electrical equipment > Direction indicators > Flashing type > Side repeaters
 Front 98 ×6.0 2.2% Likely common fault pattern
4 Daytime running lamps (front)
Lamps, reflectors and electrical equipment > Daytime running lamps
 Front 140 ×4.5 3.1% Likely common fault pattern
5 Position lamp (front)
Lamps, reflectors and electrical equipment > Position lamps > Position lamp
 Front 146 ×2.6 3.3% Possible elevated fault
6 Rbt (sp)
Brakes > Brake performance > Parking brake efficiency (sp) > Rbt (sp)
 Any 144 ×2.1 3.2% Possible elevated fault

Only patterns that clear minimum sample and elevation thresholds are shown (at least 20 failures and 2.0× peer lift).

Advisories

Advisory items recorded on failed first-attempt tests that appear elevated versus peers. Advisories are not a fail rate — they flag issues noted at the test, often before they become failures.

# Advisory pattern Location Notes vs similar cars Share Confidence
1 Wheel bearings (rear)
Suspension > Wheel bearings
 Rear 183 ×40.9 4.1% Strong pattern — appears far more often than similar cars
2 Suspension arm (front)
Suspension > Suspension arms > Suspension arm
 Front 63 ×11.8 1.4% Elevated vs peers
3 Macpherson strut (front)
Suspension > Macpherson strut > Macpherson strut
 Front 31 ×10.3 0.7% Elevated vs peers
4 Wheel bearings (front)
Suspension > Wheel bearings
 Front 40 ×5.3 0.9% Likely common fault pattern

FAQs

We do not show a single reliability score for the 2018 Toyota Yaris on this page. Among 4,473 failed first-attempt MOT tests (test year 2025), Wheel bearings (rear) appears more often than on similar peer cars (about 132.5× more often than peers; 915 observed failures; 20.5% of failed tests). Treat this as a pre-purchase checklist from DVSA open data — not a guarantee for any individual car.
Among failed first-attempt tests we surface patterns that appear more often than on similar peer cars. Top example: Wheel bearings (rear) (about 132.5× more often than peers; 915 observed failures; 20.5% of failed tests). These are statistical signals, not a diagnosis of any individual car.
Wheel bearings (rear) shows up more often than on similar peer cars (about 132.5× more often than peers; 915 observed failures; 20.5% of failed tests). That does not prove a causal design fault — age, mileage, and usage still matter. Treat it as a pre-purchase check point, not a manufacturer TSB.
Common MOT problem areas for the 2018 Toyota Yaris include Wheel bearings (rear), Side repeaters. These are elevated versus similar peer cars where lift clears our floors — not a full list of every possible fault on an individual car.
Advisories flag issues noted at the test and are not a fail rate. We show advisory patterns that look elevated versus peers among failed first-attempt tests, separate from common failure rows. Use them as early-warning checks, not as a pass/fail score.
This page highlights elevated MOT failure patterns for the 2018 Toyota Yaris (registration year) using UK DVSA open data for the selected test year. Patterns are ranked against similar age and mileage peers. It is a buyer checklist from MOT defect statistics — not a full service history or manufacturer TSB list.
No. MOT tests do not cover engine internals, gearboxes, or many electronic modules. Patterns here come from MOT defect statistics only and should not be read as engine or gearbox reliability scores.
PRS means the vehicle failed items that were fixed at the test station and then passed the same day. We count PRS as a first-attempt fail in headline rates so same-day repairs do not hide problems.

About this data

Universe. UK class 4 cars only; normal MOT tests (not retests); results pass, PRS, or fail; one first test per vehicle per calendar year.

PRS policy. PRS means the vehicle failed items that were fixed at the test station and then passed the same day. We count PRS as a first-attempt fail in headline rates so same-day repairs do not hide problems.

Peer baseline. We compare this model year with other class 4 cars of similar age and mileage in the same test year, excluding the whole model family so the car is not compared with itself (leave-one-out peer baseline).

Data years. Test years covered: 2024, 2025.

Limitations.

  • MOT tests do not cover engine internals, gearboxes, or many electronic modules — so this is not a full reliability score.
  • Common faults are inferred from MOT defect statistics, not manufacturer TSBs or recalls.
  • Matching on age and mileage reduces but does not remove every usage or maintenance difference between cars.
  • Pass rates and star scores appear only when those data marts are available; this page never invents them.

Display rules config: 1

Contains public sector information licensed under the Open Government Licence v3.0.

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