MOT History from tests of petrol ALFA ROMEO 166s year 2004

Review the list of common ALFA ROMEO 166 failures below or to perform a specific mot history check on your ALFA ROMEO then use our popular KnowYourCar service

mot history

Pass percent:58.00%

(The average a petrol ALFA ROMEO 166 year 2004 passes without issue)

Based on:1,138 MOT Tests

Most common failures	No# failures
Headlamp aim out of alignment	96
Parking brake: efficiency below requirements \|3.7.B.7\|	76
Brake pipe excessively corroded	63
Windscreen wiper does not clear the windscreen effectively	60
Rear parking brake recording little or no effort	42
Registration plate lamp issues	33
Nearside Front position lamp\|s\| not working \|1.1.A.3b\|	29
Offside Front position lamp\|s\| not working \|1.1.A.3b\|	22
Rear brake binding	20
Brake hose excessively deteriorated	19
Registration plate issues	17
Offside Rear fog lamp not working \|1.3.2b\|	15
Nearside Front Front position lamp\|s\| not working \|1.1.A.3b\|	13
Offside Front coil spring fractured \|2.4.C.1a\|	11
Nearside Front coil spring broken \|2.4.C.1a\|	11
Nearside Stop lamp not working \|1.2.1b\|	10
Rear Exhaust system not adequately supported \|7.1.1\|	10
Offside Front Front position lamp\|s\| not working \|1.1.A.3b\|	10
Offside Front coil spring broken \|2.4.C.1a\|	10
Anti-lock braking system warning lamp indicates an ABS fault	10
Parking brake efficiency below requirements (1.4.2 (a) (i))	9
Centre Exhaust system not adequately supported \|7.1.1\|	8
Brakes imbalanced across an axle	8
Offside Stop lamp not working \|1.2.1b\|	8
Windscreen has damage	8
Parking brake efficiency below requirements \|1.4.2 \|a\| \|i\|\|	7
Rear Exhaust has a major leak of exhaust gases \|7.1.2\|	6
Nearside Front coil spring fractured \|2.4.C.1a\|	6
Supplementary Restraint System warning lamp indicates a fault \|5.4.2\|	6
Offside Front Upper Suspension arm has excessive play in a pin/bush \|2.4.G.2\|	6
Offside Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	5
Exhaust system not adequately supported \|7.1.1\|	5
Exhaust has a major leak of exhaust gases \|7.1.2\|	5
Nearside Front Coil spring fractured or broken (5.3.1 (b) (i))	4
Windscreen wiper blade insecure	4
Emissions not tested \|7.0\|	4
Nearside Headlamp not working on dipped beam \|1.7.5a\|	4
Nearside Headlamp not working on main beam \|1.7.5a\|	4
Offside Headlamp excessively deteriorated so that the light output is severely reduced \|1.7.5a\|	4
Offside Rear Service brake excessively binding \|1.2.1 \|f\|\|	4
Nearside Headlamp excessively deteriorated so that the light output is severely reduced \|1.7.5a\|	4
Offside Front Coil spring fractured or broken \|5.3.1 \|b\| \|i\|\|	4
Offside Front Coil spring fractured or broken (5.3.1 (b) (i))	4
Offside Front Position lamp not working (4.2.1 (a) (ii))	4
Nearside Front constant velocity joint gaiter damaged to the extent that it no longer prevents the ingress of dirt etc \|2.5.C.1a\|	4
Rear Brake cable insecure	4
Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h))	4
Supplementary restraint system warning lamp indicates a fault (7.1.6 (a))	4
Offside Front coil spring incomplete \|2.4.C.1a\|	4
Front Exhaust has a major leak of exhaust gases \|7.1.2\|	4
Nearside Front Position lamp not working (4.2.1 (a) (ii))	3
Offside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i))	3
Exhaust emissions carbon monoxide content after 2nd fast idle excessive \|7.3.D.3\|	3
Nearside Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	3
Nearside Front Position lamp not working \|4.2.1 \|a\|\|	3
Rear fog lamp tell tale not working \|1.3.1b\|	3
Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c))	3
Offside Front Lower Suspension arm has excessive play in a ball joint \|2.4.G.2\|	3
Service brake: efficiency below requirements \|3.7.B.7\|	3
Offside Front Upper Suspension arm pin or bush excessively worn (5.3.4 (a) (i))	3
Offside Rear Stop lamp not working \|1.2.1b\|	3
Rear Mechanical brake component has restricted free movement	3
Offside Stop lamp(s) not working (4.3.1 (a) (ii))	3
Offside Rear Service brake excessively binding (1.2.1 (f))	3
Nearside Front constant velocity joint gaiter split \|2.5.C.1a\|	3
Offside Rear position lamp\|s\| not working \|1.1.A.3b\|	3
Nearside Rear Anti-roll bar has excessive play in a pin/bush \|2.4.G.2\|	3
Front brake disc in such a condition that it is seriously weakened	3
Stop lamp remains on when the brakes are released	3
Nearside Rear Lower Suspension arm has excessive play in a pin/bush \|2.4.G.2\|	3
Nearside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii))	2
Nearside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i))	2
Nearside Rear Parking brake inoperative on one side (1.4.1 (a))	2
Nearside Front Front constant velocity joint gaiter damaged to the extent that it no longer prevents the ingress of dirt etc \|2.5.C.1a\|	2
Nearside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c))	2
Nearside Front Wheel bearing has excessive play (5.1.3 (a) (i))	2
Offside Headlamp not working on dipped beam \|1.7.5a\|	2
Fuel pipe leaking \|7.2.3\|	2
Offside Front Suspension arm ball joint excessively worn \|5.3.4 \|a\| \|i\|\|	2
Nearside Front Wheel bolt\|s\| missing \|4.2.A.1e\|	2
Exhaust Lambda reading after 2nd fast idle outside specified limits \|8.2.1.2 \|c\|\|	2
Offside Rear Brake pipe leaking \|3.6.A.1\|	2
Nearside Front Braking system leaking \|3.6.A.1\|	2
Nearside Rear position lamp\|s\| excessively deteriorated so that it is not visible from a reasonable distance \|1.1.A.3d\|	2
Offside Rear Rear fog lamp not working \|1.3.2b\|	2
Offside Track rod end ball joint has excessive play (2.1.3 (b) (i))	2
Nearside Rear Suspension arm has excessive play in a pin/bush \|2.4.G.2\|	2
Offside Rear Suspension arm has excessive play in a pin/bush \|2.4.G.2\|	2
Nearside Side repeater not working \|1.4.A.2c\|	2
Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii))	2
Nearside Rear Seat belt locking mechanism does not secure or release \|5.2.5a\|	2
Supplementary restraint system warning lamp indicates a fault \|7.1.6 \|a\|\|	2
Rear fog lamp not working \|4.5.1 \|a\| \|ii\|\|	2
Nearside Headlamp lens seriously defective (4.1.1 (b) (ii))	2
Offside Headlamp lens seriously defective (4.1.1 (b) (ii))	2
Offside Stop lamp\|s\| not working \|4.3.1 \|a\| \|ii\|\|	2
Front Exhaust has a major leak of exhaust gases \|6.1.2 \|a\|\|	2
Nearside Headlamp aim aimed so that it dazzles other road users \|1.8.A.1a\|	2
Fuel tank leaking \|7.2.3\|	2
Nearside Headlamp aim beam image kick up to the offside \|1.8\|	2
Offside Front Lower Suspension arm ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii))	2
Rear fog lamp not working \|1.3.2b\|	2
Brake fluid significantly below minimum mark (1.1.10 (d) (ii))	2
Nearside Front Lower Suspension arm has excessive play in a ball joint \|2.4.G.2\|	2
Offside Rear rear brake recording little or no effort \|3.7.B.5a\|	2
Parking brake lever has no reserve travel \|3.1.6b\|	2
Nearside Rear Wheel bolt\|s\| missing \|4.2.A.1e\|	2
Horn not working \|1.6.2a\|	2
Nearside Front Upper Suspension arm has excessive play in a pin/bush \|2.4.G.2\|	2
Offside Rear Upper Suspension arm has excessive play in a pin/bush \|2.4.G.2\|	2
Nearside Front Brake hose leaking \|3.6.A.1\|	2
Offside Rear Anti-roll bar has excessive play in a pin/bush \|2.4.G.2\|	2
Parking brake: efficiency below requirements (3.7.B.7)	2
Nearside Rear Stop lamp not working \|1.2.1b\|	2
Nearside Headlamp excessively damaged so that the light output is severely reduced \|1.7.5a\|	2

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.

Got suggestions? We’re improving this section all the time. If you have any suggestions, please let us know.

Most common failures	No# failures
Headlamp aim out of alignment	96
Parking brake: efficiency below requirements \|3.7.B.7\|	76
Brake pipe excessively corroded	63
Windscreen wiper does not clear the windscreen effectively	60
Rear parking brake recording little or no effort	42
Registration plate lamp issues	33
Nearside Front position lamp\|s\| not working \|1.1.A.3b\|	29
Offside Front position lamp\|s\| not working \|1.1.A.3b\|	22
Rear brake binding	20
Brake hose excessively deteriorated	19
Registration plate issues	17
Offside Rear fog lamp not working \|1.3.2b\|	15
Nearside Front Front position lamp\|s\| not working \|1.1.A.3b\|	13
Offside Front coil spring fractured \|2.4.C.1a\|	11
Nearside Front coil spring broken \|2.4.C.1a\|	11
Nearside Stop lamp not working \|1.2.1b\|	10
Rear Exhaust system not adequately supported \|7.1.1\|	10
Offside Front Front position lamp\|s\| not working \|1.1.A.3b\|	10
Offside Front coil spring broken \|2.4.C.1a\|	10
Anti-lock braking system warning lamp indicates an ABS fault	10
Parking brake efficiency below requirements (1.4.2 (a) (i))	9
Centre Exhaust system not adequately supported \|7.1.1\|	8
Brakes imbalanced across an axle	8
Offside Stop lamp not working \|1.2.1b\|	8
Windscreen has damage	8
Parking brake efficiency below requirements \|1.4.2 \|a\| \|i\|\|	7
Rear Exhaust has a major leak of exhaust gases \|7.1.2\|	6
Nearside Front coil spring fractured \|2.4.C.1a\|	6
Supplementary Restraint System warning lamp indicates a fault \|5.4.2\|	6
Offside Front Upper Suspension arm has excessive play in a pin/bush \|2.4.G.2\|	6
Offside Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	5
Exhaust system not adequately supported \|7.1.1\|	5
Exhaust has a major leak of exhaust gases \|7.1.2\|	5
Nearside Front Coil spring fractured or broken (5.3.1 (b) (i))	4
Windscreen wiper blade insecure	4
Emissions not tested \|7.0\|	4
Nearside Headlamp not working on dipped beam \|1.7.5a\|	4
Nearside Headlamp not working on main beam \|1.7.5a\|	4
Offside Headlamp excessively deteriorated so that the light output is severely reduced \|1.7.5a\|	4
Offside Rear Service brake excessively binding \|1.2.1 \|f\|\|	4
Nearside Headlamp excessively deteriorated so that the light output is severely reduced \|1.7.5a\|	4
Offside Front Coil spring fractured or broken \|5.3.1 \|b\| \|i\|\|	4
Offside Front Coil spring fractured or broken (5.3.1 (b) (i))	4
Offside Front Position lamp not working (4.2.1 (a) (ii))	4
Nearside Front constant velocity joint gaiter damaged to the extent that it no longer prevents the ingress of dirt etc \|2.5.C.1a\|	4
Rear Brake cable insecure	4
Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h))	4
Supplementary restraint system warning lamp indicates a fault (7.1.6 (a))	4
Offside Front coil spring incomplete \|2.4.C.1a\|	4
Front Exhaust has a major leak of exhaust gases \|7.1.2\|	4
Nearside Front Position lamp not working (4.2.1 (a) (ii))	3
Offside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i))	3
Exhaust emissions carbon monoxide content after 2nd fast idle excessive \|7.3.D.3\|	3
Nearside Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	3
Nearside Front Position lamp not working \|4.2.1 \|a\|\|	3
Rear fog lamp tell tale not working \|1.3.1b\|	3
Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c))	3
Offside Front Lower Suspension arm has excessive play in a ball joint \|2.4.G.2\|	3
Service brake: efficiency below requirements \|3.7.B.7\|	3
Offside Front Upper Suspension arm pin or bush excessively worn (5.3.4 (a) (i))	3
Offside Rear Stop lamp not working \|1.2.1b\|	3
Rear Mechanical brake component has restricted free movement	3
Offside Stop lamp(s) not working (4.3.1 (a) (ii))	3
Offside Rear Service brake excessively binding (1.2.1 (f))	3
Nearside Front constant velocity joint gaiter split \|2.5.C.1a\|	3
Offside Rear position lamp\|s\| not working \|1.1.A.3b\|	3
Nearside Rear Anti-roll bar has excessive play in a pin/bush \|2.4.G.2\|	3
Front brake disc in such a condition that it is seriously weakened	3
Stop lamp remains on when the brakes are released	3
Nearside Rear Lower Suspension arm has excessive play in a pin/bush \|2.4.G.2\|	3
Nearside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii))	2
Nearside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i))	2
Nearside Rear Parking brake inoperative on one side (1.4.1 (a))	2
Nearside Front Front constant velocity joint gaiter damaged to the extent that it no longer prevents the ingress of dirt etc \|2.5.C.1a\|	2
Nearside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c))	2
Nearside Front Wheel bearing has excessive play (5.1.3 (a) (i))	2
Offside Headlamp not working on dipped beam \|1.7.5a\|	2
Fuel pipe leaking \|7.2.3\|	2
Offside Front Suspension arm ball joint excessively worn \|5.3.4 \|a\| \|i\|\|	2
Nearside Front Wheel bolt\|s\| missing \|4.2.A.1e\|	2
Exhaust Lambda reading after 2nd fast idle outside specified limits \|8.2.1.2 \|c\|\|	2
Offside Rear Brake pipe leaking \|3.6.A.1\|	2
Nearside Front Braking system leaking \|3.6.A.1\|	2
Nearside Rear position lamp\|s\| excessively deteriorated so that it is not visible from a reasonable distance \|1.1.A.3d\|	2
Offside Rear Rear fog lamp not working \|1.3.2b\|	2
Offside Track rod end ball joint has excessive play (2.1.3 (b) (i))	2
Nearside Rear Suspension arm has excessive play in a pin/bush \|2.4.G.2\|	2
Offside Rear Suspension arm has excessive play in a pin/bush \|2.4.G.2\|	2
Nearside Side repeater not working \|1.4.A.2c\|	2
Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii))	2
Nearside Rear Seat belt locking mechanism does not secure or release \|5.2.5a\|	2
Supplementary restraint system warning lamp indicates a fault \|7.1.6 \|a\|\|	2
Rear fog lamp not working \|4.5.1 \|a\| \|ii\|\|	2
Nearside Headlamp lens seriously defective (4.1.1 (b) (ii))	2
Offside Headlamp lens seriously defective (4.1.1 (b) (ii))	2
Offside Stop lamp\|s\| not working \|4.3.1 \|a\| \|ii\|\|	2
Front Exhaust has a major leak of exhaust gases \|6.1.2 \|a\|\|	2
Nearside Headlamp aim aimed so that it dazzles other road users \|1.8.A.1a\|	2
Fuel tank leaking \|7.2.3\|	2
Nearside Headlamp aim beam image kick up to the offside \|1.8\|	2
Offside Front Lower Suspension arm ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii))	2
Rear fog lamp not working \|1.3.2b\|	2
Brake fluid significantly below minimum mark (1.1.10 (d) (ii))	2
Nearside Front Lower Suspension arm has excessive play in a ball joint \|2.4.G.2\|	2
Offside Rear rear brake recording little or no effort \|3.7.B.5a\|	2
Parking brake lever has no reserve travel \|3.1.6b\|	2
Nearside Rear Wheel bolt\|s\| missing \|4.2.A.1e\|	2
Horn not working \|1.6.2a\|	2
Nearside Front Upper Suspension arm has excessive play in a pin/bush \|2.4.G.2\|	2
Offside Rear Upper Suspension arm has excessive play in a pin/bush \|2.4.G.2\|	2
Nearside Front Brake hose leaking \|3.6.A.1\|	2
Offside Rear Anti-roll bar has excessive play in a pin/bush \|2.4.G.2\|	2
Parking brake: efficiency below requirements (3.7.B.7)	2
Nearside Rear Stop lamp not working \|1.2.1b\|	2
Nearside Headlamp excessively damaged so that the light output is severely reduced \|1.7.5a\|	2

MOT History from tests of petrol ALFA ROMEO 166s year 2004

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