Quote:
Originally Posted by Laird Scooby
Often with automatics, a higher output starter was used than the petrol counterparts, hence the fatter starters as they would be ~1.4kW instead of ~1kW. There's no knowing on a used car if someone has changed the starters without checking the numbers and the original fitments for comparison, however if one car is auto and the other is manual, it would be a fair assumption (especially if the rating was on the starters and confirmed the fat one is higher power) the auto needs the fatter one.
However it doesn't always follow, especially with cars of that age as Bosch were developing starters that were slimmer and lighter but produced comparable power.
Won't know for sure until the OP reports the Bosch number on it.
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The "fat" starter is superb quality with field coils and interchangeable , The "slim" one is a glorified wiper motor , cost cutting ... it is a high rpm motor so geared down with an epicyclic geartrain , which makes it sound terrible ,... !