MOT History from tests of petrol PORSCHE 911s year 1991

Review the list of common PORSCHE 911 failures below or to perform a specific mot history check on your PORSCHE then use our popular KnowYourCar service

mot history

Pass percent:80.18%

(The average a petrol PORSCHE 911 year 1991 passes without issue)

Based on:8,185 MOT Tests

Most common failures	No# failures
Headlamp aim out of alignment	580
Registration plate lamp issues	201
Windscreen wiper does not clear the windscreen effectively	153
Brake hose excessively deteriorated	108
Offside Rear fog lamp not working \|1.3.2b\|	101
Registration plate issues	81
Rear fog lamp not working \|1.3.2b\|	58
Rear fog lamp tell tale not working \|1.3.1b\|	54
Exhaust emissions carbon monoxide content excessive \|7.3.B.1a\|	46
Offside Steering rack gaiter split \|2.2.D.2d\|	45
Nearside Steering rack gaiter split \|2.2.D.2d\|	45
Offside Stop lamp not working \|1.2.1b\|	44
Offside Front position lamp\|s\| not working \|1.1.A.3b\|	40
Nearside Stop lamp not working \|1.2.1b\|	39
Nearside Front Brake hose bulging under pressure \|3.6.B.3\|	36
Horn not working \|1.6.2a\|	33
Anti-lock braking system warning lamp indicates an ABS fault	33
Parking brake: efficiency below requirements \|3.7.B.7\|	30
Nearside Front position lamp\|s\| not working \|1.1.A.3b\|	29
Brakes imbalanced across an axle	28
Offside Rear Rear fog lamp not working \|1.3.2b\|	27
Offside Front Brake hose bulging under pressure \|3.6.B.3\|	27
Windscreen washer not working	23
Nearside Rear Stop lamp not working \|1.2.1b\|	22
Nearside Headlamp aim beam image kick up to the offside \|1.8\|	21
Offside Headlamp aim beam image kick up to the offside \|1.8\|	21
Offside Rear Stop lamp not working \|1.2.1b\|	21
Nearside Front Steering rack gaiter split \|2.2.D.2d\|	20
Nearside Rear Direction indicator not working \|1.4.A.2c\|	20
Nearside Rear position lamp\|s\| not working \|1.1.A.3b\|	19
Offside Headlamp not working on dipped beam \|1.7.5a\|	18
Rear Rear fog lamp not working \|1.3.2b\|	18
Offside Front brake disc excessively pitted \|3.5.1h\|	16
Offside Side repeater not working \|1.4.A.2c\|	16
Offside Front Steering rack gaiter split \|2.2.D.2d\|	15
Nearside Front Front position lamp\|s\| not working \|1.1.A.3b\|	14
Nearside Front Anti-roll bar linkage ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.4.G.2\|	14
Nearside Front Direction indicator not working \|1.4.A.2c\|	13
Rear parking brake recording little or no effort	13
Offside Front Anti-roll bar linkage ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.4.G.2\|	13
Nearside Rear Shock absorber has a serious fluid leak \|2.7.3\|	12
Nearside Front Anti-roll bar linkage ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.4.G.2\|	12
Service brake: efficiency below requirements \|3.7.B.7\|	12
Offside Rear position lamp\|s\| not working \|1.1.A.3b\|	11
Rear fog lamp not working (4.5.1 (a) (ii))	11
Offside Rear Shock absorber has a serious fluid leak \|2.7.3\|	11
Nearside Headlamp not working on dipped beam \|1.7.5a\|	11
Offside Front Direction indicator not working \|1.4.A.2c\|	11
Offside Front Anti-roll bar linkage ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.4.G.2\|	11
Offside Front Front position lamp\|s\| not working \|1.1.A.3b\|	11
Nearside Headlamp not in good working order adversely affecting beam image \|1.2.4a\|	11
Offside Headlamp not in good working order adversely affecting beam image \|1.2.4a\|	10
Nearside Front brake disc excessively pitted \|3.5.1h\|	10
Exhaust has a major leak of exhaust gases \|7.1.2\|	10
Parking brake efficiency below requirements (1.4.2 (a) (i))	9
Nearside Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	9
Offside Headlamp not working on main beam \|1.7.5a\|	9
Front brake disc in such a condition that it is seriously weakened	9
Windscreen has damage	9
Nearside Front Brake hose leaking \|3.6.A.1\|	9
Nearside Front Direction indicator incorrect colour \|1.4.A.2f\|	9
Nearside Rear position lamp\|s\| excessively deteriorated so that it is not visible from a reasonable distance \|1.1.A.3d\|	9
Nearside Side repeater not working \|1.4.A.2c\|	9
Offside Front Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	8
Rear fog lamp not working \|4.5.1 \|a\| \|ii\|\|	8
Offside Rear position lamp\|s\| excessively deteriorated so that it is not visible from a reasonable distance \|1.1.A.3d\|	8
Offside Rear fog lamp not working (4.5.1 (a) (ii))	8
Parking brake: efficiency below requirements \|3.7.C.1b\|	8
Battery insecure \|1.9.1\|	8
Nearside Front Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	7
Offside Rear position lamp\|s\| adversely affected by the operation of another lamp \|1.1.A.3f\|	7
Nearside Front Position lamp not working (4.2.1 (a) (ii))	7
Nearside Front Anti-roll bar ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.4.G.2\|	7
Offside Front Upper Anti-roll bar linkage ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.4.G.2\|	7
Offside Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	7
Offside Front Position lamp not working (4.2.1 (a) (ii))	7
Nearside Front Anti-roll bar linkage has excessive play in a ball joint \|2.4.G.2\|	7
Rear brake binding	7
Nearside Front Headlamp aim beam image kick up to the offside \|1.8\|	7
Nearside Rear Position lamp not working (4.2.1 (a) (ii))	7
Fuel cap/sealing device sealing washer torn \|7.2.4c\|	6
Front passenger door cannot be opened from outside the vehicle \|6.2.B.1b\|	6
Offside Headlamp aim aimed so that it dazzles other road users \|1.8.A.1a\|	6
Headlamp aim beam image kick up to the offside \|1.8\|	6
Nearside Front Upper Anti-roll bar linkage ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.4.G.2\|	6
Offside Front Anti-roll bar linkage has excessive play in a ball joint \|2.4.G.2\|	6
Nearside Side repeater incorrect colour \|1.4.A.2f\|	6
Offside Rear Direction indicator not working \|1.4.A.2c\|	6
Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c))	6
Offside Front Side repeater incorrect colour \|1.4.A.2f\|	6
Front brake application uneven	6
Offside Front Anti-roll bar ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.4.G.2\|	5
Nearside Front position lamp\|s\| incorrect colour \|1.1.A.3e\|	5
Nearside Stop lamp(s) not working (4.3.1 (a) (ii))	5
Offside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c))	5
Nearside Headlamp not working on main beam \|1.7.5a\|	5
Emissions not tested \|7.0\|	5
Front passenger door cannot be opened from inside the vehicle \|6.2.B.1b\|	5
Nearside Rear Brake hose bulging under pressure \|3.6.B.3\|	5
Exhaust emissions carbon monoxide content at idle excessive \|7.3.D.4\|	5
Nearside Front Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt \|5.3.4 \|b\| \|ii\|\|	5
Front brake disc excessively pitted \|3.5.1h\|	5
Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` \|8.3.1e\|	5
Offside Front Direction indicator incorrect colour \|1.4.A.2f\|	5
Offside Rear Front position lamp\|s\| not working \|1.1.A.3b\|	5
Offside Front Upper Anti-roll bar linkage ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.4.G.2\|	5
Exhaust emissions carbon monoxide content excessive (8.2.1.2 (b))	5
Parking brake lever has no reserve travel \|3.1.6b\|	5
Nearside Front Headlamp not in good working order adversely affecting beam image \|1.2.4a\|	5
Nearside Front Upper Anti-roll bar linkage ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.4.G.2\|	5
Offside Side repeater incorrect colour \|1.4.A.2f\|	5
Rear Stop lamp not working \|1.2.1b\|	5
Offside Front Headlamp aim beam image kick up to the offside \|1.8\|	5
Nearside Steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii))	5
Fuel cap/sealing device sealing washer deteriorated \|7.2.4c\|	5
Rear fog lamp switch inoperative (4.5.3 (a) (ii))	5
Offside Stop lamp(s) not working (4.3.1 (a) (ii))	5

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	580
Registration plate lamp issues	201
Windscreen wiper does not clear the windscreen effectively	153
Brake hose excessively deteriorated	108
Offside Rear fog lamp not working \|1.3.2b\|	101
Registration plate issues	81
Rear fog lamp not working \|1.3.2b\|	58
Rear fog lamp tell tale not working \|1.3.1b\|	54
Exhaust emissions carbon monoxide content excessive \|7.3.B.1a\|	46
Offside Steering rack gaiter split \|2.2.D.2d\|	45
Nearside Steering rack gaiter split \|2.2.D.2d\|	45
Offside Stop lamp not working \|1.2.1b\|	44
Offside Front position lamp\|s\| not working \|1.1.A.3b\|	40
Nearside Stop lamp not working \|1.2.1b\|	39
Nearside Front Brake hose bulging under pressure \|3.6.B.3\|	36
Horn not working \|1.6.2a\|	33
Anti-lock braking system warning lamp indicates an ABS fault	33
Parking brake: efficiency below requirements \|3.7.B.7\|	30
Nearside Front position lamp\|s\| not working \|1.1.A.3b\|	29
Brakes imbalanced across an axle	28
Offside Rear Rear fog lamp not working \|1.3.2b\|	27
Offside Front Brake hose bulging under pressure \|3.6.B.3\|	27
Windscreen washer not working	23
Nearside Rear Stop lamp not working \|1.2.1b\|	22
Nearside Headlamp aim beam image kick up to the offside \|1.8\|	21
Offside Headlamp aim beam image kick up to the offside \|1.8\|	21
Offside Rear Stop lamp not working \|1.2.1b\|	21
Nearside Front Steering rack gaiter split \|2.2.D.2d\|	20
Nearside Rear Direction indicator not working \|1.4.A.2c\|	20
Nearside Rear position lamp\|s\| not working \|1.1.A.3b\|	19
Offside Headlamp not working on dipped beam \|1.7.5a\|	18
Rear Rear fog lamp not working \|1.3.2b\|	18
Offside Front brake disc excessively pitted \|3.5.1h\|	16
Offside Side repeater not working \|1.4.A.2c\|	16
Offside Front Steering rack gaiter split \|2.2.D.2d\|	15
Nearside Front Front position lamp\|s\| not working \|1.1.A.3b\|	14
Nearside Front Anti-roll bar linkage ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.4.G.2\|	14
Nearside Front Direction indicator not working \|1.4.A.2c\|	13
Rear parking brake recording little or no effort	13
Offside Front Anti-roll bar linkage ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.4.G.2\|	13
Nearside Rear Shock absorber has a serious fluid leak \|2.7.3\|	12
Nearside Front Anti-roll bar linkage ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.4.G.2\|	12
Service brake: efficiency below requirements \|3.7.B.7\|	12
Offside Rear position lamp\|s\| not working \|1.1.A.3b\|	11
Rear fog lamp not working (4.5.1 (a) (ii))	11
Offside Rear Shock absorber has a serious fluid leak \|2.7.3\|	11
Nearside Headlamp not working on dipped beam \|1.7.5a\|	11
Offside Front Direction indicator not working \|1.4.A.2c\|	11
Offside Front Anti-roll bar linkage ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.4.G.2\|	11
Offside Front Front position lamp\|s\| not working \|1.1.A.3b\|	11
Nearside Headlamp not in good working order adversely affecting beam image \|1.2.4a\|	11
Offside Headlamp not in good working order adversely affecting beam image \|1.2.4a\|	10
Nearside Front brake disc excessively pitted \|3.5.1h\|	10
Exhaust has a major leak of exhaust gases \|7.1.2\|	10
Parking brake efficiency below requirements (1.4.2 (a) (i))	9
Nearside Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	9
Offside Headlamp not working on main beam \|1.7.5a\|	9
Front brake disc in such a condition that it is seriously weakened	9
Windscreen has damage	9
Nearside Front Brake hose leaking \|3.6.A.1\|	9
Nearside Front Direction indicator incorrect colour \|1.4.A.2f\|	9
Nearside Rear position lamp\|s\| excessively deteriorated so that it is not visible from a reasonable distance \|1.1.A.3d\|	9
Nearside Side repeater not working \|1.4.A.2c\|	9
Offside Front Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	8
Rear fog lamp not working \|4.5.1 \|a\| \|ii\|\|	8
Offside Rear position lamp\|s\| excessively deteriorated so that it is not visible from a reasonable distance \|1.1.A.3d\|	8
Offside Rear fog lamp not working (4.5.1 (a) (ii))	8
Parking brake: efficiency below requirements \|3.7.C.1b\|	8
Battery insecure \|1.9.1\|	8
Nearside Front Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	7
Offside Rear position lamp\|s\| adversely affected by the operation of another lamp \|1.1.A.3f\|	7
Nearside Front Position lamp not working (4.2.1 (a) (ii))	7
Nearside Front Anti-roll bar ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.4.G.2\|	7
Offside Front Upper Anti-roll bar linkage ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.4.G.2\|	7
Offside Headlamp aim beam image obviously incorrect \|1.8.A.1b\|	7
Offside Front Position lamp not working (4.2.1 (a) (ii))	7
Nearside Front Anti-roll bar linkage has excessive play in a ball joint \|2.4.G.2\|	7
Rear brake binding	7
Nearside Front Headlamp aim beam image kick up to the offside \|1.8\|	7
Nearside Rear Position lamp not working (4.2.1 (a) (ii))	7
Fuel cap/sealing device sealing washer torn \|7.2.4c\|	6
Front passenger door cannot be opened from outside the vehicle \|6.2.B.1b\|	6
Offside Headlamp aim aimed so that it dazzles other road users \|1.8.A.1a\|	6
Headlamp aim beam image kick up to the offside \|1.8\|	6
Nearside Front Upper Anti-roll bar linkage ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.4.G.2\|	6
Offside Front Anti-roll bar linkage has excessive play in a ball joint \|2.4.G.2\|	6
Nearside Side repeater incorrect colour \|1.4.A.2f\|	6
Offside Rear Direction indicator not working \|1.4.A.2c\|	6
Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c))	6
Offside Front Side repeater incorrect colour \|1.4.A.2f\|	6
Front brake application uneven	6
Offside Front Anti-roll bar ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.4.G.2\|	5
Nearside Front position lamp\|s\| incorrect colour \|1.1.A.3e\|	5
Nearside Stop lamp(s) not working (4.3.1 (a) (ii))	5
Offside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c))	5
Nearside Headlamp not working on main beam \|1.7.5a\|	5
Emissions not tested \|7.0\|	5
Front passenger door cannot be opened from inside the vehicle \|6.2.B.1b\|	5
Nearside Rear Brake hose bulging under pressure \|3.6.B.3\|	5
Exhaust emissions carbon monoxide content at idle excessive \|7.3.D.4\|	5
Nearside Front Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt \|5.3.4 \|b\| \|ii\|\|	5
Front brake disc excessively pitted \|3.5.1h\|	5
Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` \|8.3.1e\|	5
Offside Front Direction indicator incorrect colour \|1.4.A.2f\|	5
Offside Rear Front position lamp\|s\| not working \|1.1.A.3b\|	5
Offside Front Upper Anti-roll bar linkage ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt \|2.4.G.2\|	5
Exhaust emissions carbon monoxide content excessive (8.2.1.2 (b))	5
Parking brake lever has no reserve travel \|3.1.6b\|	5
Nearside Front Headlamp not in good working order adversely affecting beam image \|1.2.4a\|	5
Nearside Front Upper Anti-roll bar linkage ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt \|2.4.G.2\|	5
Offside Side repeater incorrect colour \|1.4.A.2f\|	5
Rear Stop lamp not working \|1.2.1b\|	5
Offside Front Headlamp aim beam image kick up to the offside \|1.8\|	5
Nearside Steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii))	5
Fuel cap/sealing device sealing washer deteriorated \|7.2.4c\|	5
Rear fog lamp switch inoperative (4.5.3 (a) (ii))	5
Offside Stop lamp(s) not working (4.3.1 (a) (ii))	5

MOT History from tests of petrol PORSCHE 911s year 1991

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