Morgan Plus Four MOT Pass Rate & Official DVSA Failure Statistics

Morgan Plus Four MOT History and Failure Rates vs UK National Average

The Morgan Plus Four passed on its first attempt in 91.4%, and its overall record sits +10.8 percentage points above the national average for all cars. These figures come from every recorded DVSA MOT test for the Morgan Plus Four in the 2023–2025 data: 822 tests across 6 model years (2010–2022). 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 Morgan Plus Four MOT Problems by Failure Category

Every MOT failure a tester records belongs to one inspection section of the DVSA manual. For the Morgan Plus Four, the Brakes 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 Morgan Plus Four's recorded defect strings, merged across its year pages.

Top Recorded Morgan Plus Four DVSA MOT Test Statistics & Defect Descriptions

The descriptions below are the exact DVSA failure strings testers recorded most often for the Morgan Plus Four, each with how many of the model's 822 tests it was noted on.

• "Rbt (sp) efficiency below requirements" (Major) — noted on about 16 Morgan Plus Four tests, 1.9% of the model's MOT record.
• "Catalyst emissions Lambda reading after 2nd fast idle outside specified limits" (Major) — noted on about 15 Morgan Plus Four tests, 1.8% of the model's MOT record.
• "Rbt (sp) efficiency less than 50% of the required value" (Major) — noted on about 9 Morgan Plus Four tests, 1.1% of the model's MOT record.
• "Parking brake performance inoperative on one side" (Major) — noted on about 9 Morgan Plus Four tests, 1.1% of the model's MOT record.
• "Rear fog lamp not working" (Major) — noted on about 3 Morgan Plus Four tests, 0.4% of the model's MOT record.
• "Hand lever has insufficient reserve travel" (Major) — noted on about 3 Morgan Plus Four tests, 0.4% of the model's MOT record.

Best and Worst Morgan Plus Four Model Years by Pass Rate

The strongest Morgan Plus Four model year on record is 2010 (94.6% across 56 tests), and the weakest is 2012 (88.7%). The gap between them is 5.9 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 Morgan Plus Four Owners

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

• the exhaust and emissions — “catalyst emissions Lambda reading after 2nd fast idle outside specified limits”

  Listen for a blow at idle and have someone rev it gently. Then look at the tailpipe smoke: blue is oil, white when warm is coolant, black is over-fuelling. Any of those and the emissions test is the least of it.

• the lights — “rear fog lamp not working”

  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 suspension joints — “ball joint dust cover severely deteriorated”

  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 Morgan Plus Four. A check that finds nothing means the item is likely fine, not that the test is guaranteed.

Frequently Asked Questions: Morgan Plus Four MOT & Reliability