Toyota Sienta MOT Pass Rate & Official DVSA Failure Statistics

Toyota Sienta MOT History and Failure Rates vs UK National Average

The Toyota Sienta passed on its first attempt in 88.7%, and its overall record sits +8.6 percentage points above the national average for all cars. These figures come from every recorded DVSA MOT test for the Toyota Sienta in the 2023–2025 data: 777 tests across 6 model years (2015–2020). A test still carries exactly one pass or fail verdict.

Figures are computed from every recorded DVSA test for this model in the 2023–2025 data.

Most Common Toyota Sienta MOT Problems by Failure Category

Every MOT failure a tester records belongs to one inspection section of the DVSA manual. For the Toyota Sienta, the Lamps, reflectors and electrical equipment section leads the record — the breakdown below shows where the recorded failures cluster, then the exact strings behind the three biggest sections.

Shares are over the Toyota Sienta's recorded defect strings, merged across its year pages.

Top Recorded Toyota Sienta DVSA MOT Test Statistics & Defect Descriptions

The descriptions below are the exact DVSA failure strings testers recorded most often for the Toyota Sienta, each with how many of the model's 777 tests it was noted on.

• "Registration plate lamp(s) inoperative in the case of multiple lamps or light sources" (Minor) — noted on about 19 Toyota Sienta tests, 2.4% of the model's MOT record.
• "Rear fog lamp not working" (Major) — noted on about 18 Toyota Sienta tests, 2.3% of the model's MOT record.
• "Windscreen damaged but not adversely affecting driver's view" (Minor) — noted on about 13 Toyota Sienta tests, 1.7% of the model's MOT record.
• "Position lamp not working" (Rectified) — noted on about 9 Toyota Sienta tests, 1.2% of the model's MOT record.
• "Rear fog lamp does not emit a steady red light" (Major) — noted on about 8 Toyota Sienta tests, 1.0% of the model's MOT record.
• "Registration plate lamp(s) inoperative in the case of a single lamp or all lamps" (Rectified) — noted on about 6 Toyota Sienta tests, 0.8% of the model's MOT record.

Best and Worst Toyota Sienta Model Years by Pass Rate

The strongest Toyota Sienta model year on record is 2018 (95.2% across 105 tests), and the weakest is 2020 (84.8%). The gap between them is 10.4 points. Years with fewer than 50 recorded tests are excluded, so these are the years with enough MOT history to mean something.

Newest model year first. Only years with at least 50 recorded tests are listed.

Pre-MOT Inspection Checklist for Toyota Sienta Owners

These checks follow this Toyota Sienta's own most-recorded failure strings, starting with what a tester is most likely to flag on a Toyota Sienta.

• the lights — “registration plate lamp(s) inoperative in the case of multiple lamps or light sources”

  Switch everything on and walk round the car: both headlamps on dip and main, every indicator, both brake lights, reverse, fog and the two number-plate lamps. A bulb is a few pounds and a five-minute job.

• the windscreen — “windscreen damaged”

  Check the driver’s side of the screen within the swept area for chips and cracks; anything larger than 10mm in the driver’s central view is a fail. Most chips can be resin-repaired for far less than a new screen.

• the suspension joints — “linkage ball joint dust cover ball joint dust cover no longer prevents the ingress of dirt”

  With the car parked on level ground, rock the top of each front wheel in and out while someone watches the suspension arm. Clunks, or rubber boots split and greasy, are what testers record here.

Derived from the DVSA failure strings testers recorded for the Toyota Sienta. A check that finds nothing means the item is likely fine, not that the test is guaranteed.

Frequently Asked Questions: Toyota Sienta MOT & Reliability