2017 BMW 5 Series 2.0L Diesel · ES55 AMS

A repeating failure on the front outer constant velocity (CV) joint boots is the defining mechanical issue in this vehicle's MOT history. The 2024-12-06 test was failed outright for split boots on both the offside and nearside front drive shafts, and the same offside front defect had previously been recorded as a major failure on 2023-12-12 alongside a passed test with advisories. Despite these two major defects, the vehicle returned to the road in short order with no defects recorded on 2024-12-07 and again on 2025-12-08, indicating that corrective work has been carried out and the car has since maintained a clean roadworthiness pass. The pattern suggests a propensity for these particular rubber boots to degrade or sustain damage, and a prospective buyer should treat the gaiters as a known service item going forward. No other structural, braking, suspension, or lighting defects have been recorded across the available test history. The recorded mileage of 83,836 miles over nine years equates to an average of roughly 9,315 miles per annum, which sits within normal expectations for a 2017 BMW 5 Series and is consistent with mixed private and business use. There are no significant gaps between test dates that would suggest long periods off the road, and mileage progression between consecutive tests appears steady. At this annual accumulation rate, the engine, automatic or manual gearbox, and drivetrain will have accumulated moderate wear; consumable items such as brake pads and discs, tyres, and suspension bushes are likely to be approaching or have already undergone replacement during the vehicle's life. Tyre wear was flagged in the 2023 advisories on both rear tyres close to the legal limit and showing edge wear, which is consistent with the vehicle's age and accumulated mileage rather than a specific defect. A close inspection of the front CV joint boots should be the priority on any pre-purchase examination, and any evidence of fresh grease around the inboard or outboard gaiters, perished or torn rubber, or recently replaced boots should be discussed with the seller to confirm the nature and quality of the rectification. On the road, listen for any clicking or knocking from the front wheels during full-lock low-speed manoeuvres, which would indicate a worn joint following boot failure, and feel for vibration through the steering or transmission tunnel under acceleration. The 2023 advisories also noted uneven edge wear on both rear tyres, so examine the current rear tyres for inner or outer shoulder wear; this can be caused by incorrect camber, worn rear suspension bushes, or weakened coil springs, all of which are common on a 5 Series of this age and mileage. Beyond the recorded items, a test drive should include firm braking from speed to check for pedal pulsation or judder that would suggest warped front brake discs, and the car should be driven over uneven surfaces with the windows down to listen for clonking or knocking from the front suspension, which can indicate worn control arm or anti-roll bar bushes. Steering should be checked for any vagueness or pulling to one side, which could point to worn front suspension components or tracking issues. Finally, request documentation confirming the CV boot repair carried out between the 2023 and 2024 tests, as the recurrence of the same defect on the offside front within twelve months warrants confirmation that quality replacement gaiters and grease were used.