Bmw 420's have a extremely good reliability rating of 842/999. The score was a mathematical result of the average score of every Bmw 420 that has had a registered MOT. Bmw 420's reliability review's are reflected in the score. Click here to see how we calculate each score.

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We calculated all of the below figures by getting the score from each vehicle make/model/year/fuel, which are each calculated a score. We then generate the average score from those.

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