See part 1 here
Watch all 5 videos to fully understand. See the related images in the gallery at top of the page.
1) Shows how very similar 2 starter motors are. (They were also supplied for the wrong for the models stated!)
2) Shows a starter motor supplied for a R50 Cooper (manual all years) as per the auto factors systems, yet this is wrong.
3) Shows a starter motor supplied for a R53/R52 Cooper S, JCW & GP1 (manual all years) as per the auto factors systems, this is also wrong.
4) Shows a “R50” Starter motor on a R53 Cooper S engine and Flywheel…. its a match! but the spec says its for a R50!
5) Shows the tooth formation of a Fidenza Flywheels ring gear for a R53/R52 Cooper S, JCW & GP1 (manual all years) next to the stock OEM Flywheels ring gear for the exact same model (it is damaged but you can still see the tooth shape is completely different / wrong) This model still makes a horrible screech noise when starting due to the wrong tooth formation. (Even when new and not damaged)
6) Shows the tooth formation of a GTT Light Weight Aluminium Flywheels ring gear for a R53/R52 Cooper S, JCW & GP1 (manual all years) next to the stock OEM Flywheels ring gear for the exact same model… it is a perfect 100% match.
7&8) Shows the manufactures starter motor fitting instructions (highlighted in green) this is a very dangerous statement telling you not to worry about small changes in appearance won’t cause performance issues! IGNORE THIS
Remember, DO NOT rely on part numbers and part listings, Measure everything! There could be more than 1 fault! You may end up ordering several units before you receive the correct spec.
Video part 1 /5 (Introduction)
Part 2 / 5 (The measurements between 2 very similar units)
Part 3 / 5 (Trying to fit 2 different units with a GTT Flywheel)
Part 4 / 5 (Trying to fit with OEM BMW FW + Comparison to GTT FW)
Part 5/5 (The Conclusion)
From a quick search online across forums…. particularly North American Motoring and this YouTube video below…. just look at the comments below. A number of cases where people have been supplied the wrong unit for the model, Bare in mind that there can be different issues from different manufacturers/suppliers: