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MOT History from tests of diesel DENNIS UNKNOWNs year 1999

Review the list of common DENNIS UNKNOWN failures below or to perform a specific mot history check on your DENNIS then use our popular KnowYourCar service

mot history
Pass percent:69.15%
(The average a diesel DENNIS UNKNOWN year 1999 passes without issue)
Based on:94 MOT Tests
Most common failuresNo# failures
Brakes imbalanced across an axle12
Headlamp aim out of alignment11
Service brake efficiency below requirements (1.2.2 (a) (i))4
Nearside Rear Upper Stop lamp not working |1.2.1b|2
Parking brake efficiency below requirements (1.4.2 (a) (i))2
Windscreen wiper does not clear the windscreen effectively2
Offside Rear Parking brake inoperative on one side (1.4.1 (a))2
Nearside Rear Suspension bellows damaged or deteriorated and function affected (5.3.5 (b) (i))2
Brake hose has insufficient room to move1
All position lamps not working |1.1.A.3b|1
Registration plate lamp issues1
Nearside Front Air suspension levelling valve leaking |2.4.D.2|1
Stop lamp remains on when the brakes are released1
Nearside Rear Upper Direction indicator not working when footbrake applied |1.4.A.2c|1
Nearside Rear Upper Rear position lamp|s| not working when footbrake applied |1.1.A.3b|1
Offside Rear Emergency exit sign missing inside & outside |6.2.D.3|1
Nearside Rear Upper Direction indicators incorrect colour lens cracked showing white light |1.4.A.2f|1
Nearside Rear Leaf spring to axle securing bolt insecure u bolts loose |2.4.B.7b|1
Headlamp not working on dipped beam both |1.7.5a|1
Main beam `tell-tale` not working |1.7.4c|1
Headlamp not working on main beam both |1.7.5a|1
Nearside Front wheel bearing rough when rotated |2.5.A.2|1
Nearside Rear Air suspension bellows leaking |2.4.D.2|1
Offside Rear Air suspension bellows leaking |2.4.D.2|1
Nearside Rear Upper Shock absorber insecure |2.7.2b|1
Service brake: efficiency below requirements |3.7.B.7|1
Offside Rear Brake valve leaking |3.6.A.1|1
Exhaust system not adequately supported tail pipe rubber mount broken |7.1.1|1
Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b|1
Service brake efficiency less than 50% of the required value |1.2.2 |a| |ii||1
Parking brake efficiency below requirements |1.4.2 |a| |i||1
Braking system leaking |1.1.3 |d||1
Nearside Rear Upper Direction indicator not working |4.4.1 |a| |ii||1
Rear Stop lamp|s| all not working both |4.3.1 |a| |iii||1
Nearside Rear Upper Suspension spring mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i))1
Nearside Rear Braking system leaking Brake chamber (1.1.3 (d))1
Offside Front Service brake has no recorded effort at a wheel (1.2.1 (a) (ii))1
Steering system fouling drag link arm fouling on leaf spring on left hand lock (2.1.4 (a))1
Offside Rear Service brake effort inadequate at a wheel (1.2.1 (a) (i))1
Nearside Rear Direction indicator adversely affected by the operation of another lamp |1.4.A.2h|1
Offside Rear Service brake has no recorded effort at a wheel (1.2.1 (a) (ii))1
Nearside Stop lamp adversely affected by the operation of another lamp |1.2.1f|1
Nearside Rear Suspension bellows leaking (5.3.5 (c))1
Rear fog lamp tell-tale not working (4.9.1 (a) (ii))1
Offside Front Lower Shock absorbers has an excessively worn bush (5.3.2 (c))1
Offside Rear Fuel system component leaking (6.1.3 (b) (i))1
Exhaust has a major leak of exhaust gases (6.1.2 (a))1
Offside Rear Upper Suspension component mounting prescribed area excessively corroded significantly reducing structural strength air bag mount (5.3.6 (a) (i))1
Offside Rear Position lamp not working top (4.2.1 (a) (ii))1
Nearside Rear Direction indicator not working top (4.4.1 (a) (ii))1
Offside Rear Outline marker lamp not working top (4.2.1 (a) (ii))1
Nearside Front Air brake cylinder/actuator leaking and braking performance affected (1.1.16 (b) (ii))1
Nearside Front Upper Suspension bellows damaged or deteriorated and function affected Top plate and bracket corroded to excess (5.3.5 (b) (i))1
Offside Front Upper Suspension bellows damaged or deteriorated and function affected Toplate corroded to excess (5.3.5 (b) (i))1
Rear Engine mounting damaged or deteriorated resulting in excessive movement Engine mounting support badly bent (6.1.8 (a) (i))1
Power steering pump leaking Leaking down rear of engine (2.1.5 (a))1
Nearside Front Entrance/exit step significantly damaged Front end of entrance platform plywood rotten (9.7 (a) (ii))1
Nearside Front Anti-roll bar pin or bush excessively worn (5.3.4 (a) (i))1
Offside Front Anti-roll bar pin or bush excessively worn (5.3.4 (a) (i))1
Nearside Vehicle structure corroded to the extent that the rigidity of the assembly is significantly reduced Outrigger corroded and holed (6.1.1 (c) (i))1
Offside Vehicle structure corroded to the extent that the rigidity of the assembly is significantly reduced Outrigger corroded and holed (6.1.1 (c) (i))1
Rear Anti-roll bar pin or bush excessively worn Clamp bushes missing on n/s and partly adrift on o/s (5.3.4 (a) (i))1
Nearside Rear Vehicle structure corroded to the extent that the rigidity of the assembly is significantly reduced Outer chassis by levelling valve (6.1.1 (c) (i))1
Nearside Rear Road wheel fixing loose (5.2.1 (a) (i))1
Nearside Front Axle king pin is loose in the axle beam excessive side play/ no lift (5.1.2 (d) (i))1
Oil leaking excessively from engine (8.4.1 (a) (i))1
Nearside Rear Suspension unit leaking (5.3.5 (c))1
Offside Vehicle structure corroded to the extent that the rigidity of the assembly is significantly reduced centre of chassis rail (6.1.1 (c) (i))1
Braking system leaking air tank leaking (1.1.3 (d))1
Nearside Front Suspension bellows damaged or deteriorated and function affected (5.3.5 (b) (i))1
Offside Rear Suspension bellows damaged or deteriorated and function affected (5.3.5 (b) (i))1
Hazard warning switch inoperative (4.4.2 (a) (ii))1
Nearside Front Suspension component mounting prescribed area excessively corroded significantly reducing structural strength Air bag top mount bracket and plate corroded (5.3.6 (a) (i))1
Offside Front Suspension component mounting prescribed area excessively corroded significantly reducing structural strength Air bag top plate mount and plate corroded (5.3.6 (a) (i))1
Offside Rear Suspension component mounting prescribed area excessively corroded significantly reducing structural strength Front torsion bar mount area corroded (5.3.6 (a) (i))1
Nearside Vehicle structure is deformed and structural rigidity is significantly reduced Outrigger significantly deformed (6.1.1 (a) (i))1
Offside Fuel system component leaking Fuel leak on front of engine in area of chassis aglomerator (6.1.3 (b) (i))1

We get to these numbers by trawling through over 1 billion MOT test results since 2004 and crunched the numbers. We remove anything to do with Tyres, as they are model independent and group together common non-model specific issues. We are trying to get to a picture of what models have what issues.

Please note: We take the data from the DVSA. This data is raw and can contain typos and spelling mistakes that garages may have entered while recording a MOT result. Specifically miss-match on names of models and makes. We are constantly cleaning the data so bear with the odd issue.

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