Some years back I spotted two rebuilders in California advertising on ebay. At the time I mentioned members might consider using them as it appeared they were doing quality rebuilds. At fair prices. You pretty much want a new solenoid present on a good rebuild. Anything but bosh I consider not equal.

The chain rebuilders are supplying at contracted lowest possible prices. So expect the cheapest solinoids the rebuilders can obtain or even worse the original still on them and painted. Do not expect new bosh ones on their rebuilts.

There are two issues with them used. They suffer draw in issues at the voltage in our cars but not at a full twelve volt test on a bench. Plus the high current contacts will have wear. Plus the internal coil may have cooked a little over the years.

I had some problems even years ago with chain starters and alternators. Today I would feel better just pulling a used starter off a wreck that a chain rebuilt. Not because of the price differential ether.

Anyways I suspect you may have used one of those good rebuilders. . You cannot get that type of feedback on starters and alternators unless you are doing really good work. Plus using good replacement parts.

I have no ideal of what the future holds for the junk new parts rebuilders. Medium sized ones in north America shut down years ago. They experienced too many warranty returns when using north American labor to survive.

Bosh rebuilts purchased from the chains are probably good but higher in cost. Almost double perhaps in comparison to those starters and alternators they source from the junk parts users.