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MOT History from tests of petrol BSA THUNDERBOLTs year 1972

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

mot history
Pass percent:87.20%
(The average a petrol BSA THUNDERBOLT year 1972 passes without issue)
Based on:125 MOT Tests
Most common failuresNo# failures
Headlamp aim out of alignment4
Headlamp aim beam image kick up to the offside |1.6|2
Nearside Rear Direction indicator not working |1.5.1c|2
Drive chain excessively loose |6.2.1d|1
Rear Brake pedal has inadequate reserve travel |3.1.3b|1
Front Headlamp aim beam image kick up to the offside |1.6|1
Front Throttle operating incorrectly |6.2.1f|1
Front Roller brake test indicates a binding brake |3.3.A1a|1
Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d|1
Direction indicators flashing less than 60 times a minute |1.5.1c|1
Stop lamp does not illuminate immediately a brake applies |1.3.1a|1
Nearside Handlebar handgrip not secure to handlebars. |2.1.1c|1
Rear wheel spindle loose |2.4.A.2b|1
Front Fuel system component insecure petrol tank |7.2.1b|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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