Water Pump and Rear view mirror question

[442nd986s]

So I aquired my '01 986 S back in March of this year from a non Porsche dealership. Tried different avenues in recovering history service records and have come up dry. The car is nearing 90k miles and 10 years and feel like I should invest into performing some preventative maintence, to include a new water pump, coolant flush. The car runs great and doesn't nor come close to over heating. I just looked at outside of the pump and it looks in pretty good shape. I know that the propeler inside of it is the main concern, but is there a way to tell if the part is the original or aftermarket replacement? I tried looking for the stamped Porsche part number (986.xxxxxxx) but no luck. I saw a num on top of it stamped (120280). Also, what does everyone here recommend, replacing it with Porsche original or aftermarket?

2nd question.
Since aquiring my car, the auto-dimming mirror doesn't work. The indicator light on it comes on and off when the button is pressed, but it doesn't make a difference. I've tried looking for the fuse, but didn't find any dedicated fuse in the listing nor fuse box. I feel that it's not the fuse cause the indicator light on the mirror lights up when the button is pressed. But I'm lost

Thanks

[tonycarreon]

i think the consensus on the board is to stick with the OEM waterpump. i think some people report issues with aftermarket brands "weeping" and the metal impellers are generally considered not a good upgrade.

the mirror is automatic. the button (underneath the mirror) is for turning it on and off. otherwise there is nothing you need to do. it will move down when it detects too much glare and back when it detects things are okay.

if the light is off, automatic anti-glare is off. if the light is on, automatic anti-glare is on. if it's not working make sure there's nothing blocking the sensors.

[Paul]

I recommend using the stock pump and there is no reason not to reuse the coolant if it is the original Porsche fill.

[thstone]

Originally Posted by Paul

I recommend using the stock pump and there is no reason not to reuse the coolant if it is the original Porsche fill.

I went ahead and replaced the coolant when I got my car with 84K miles.

Maybe it was overkill (I know that its supposed to be good for the life of the car and its expensive) but it seemed like the right thing to do when I didn't know the full history of the car and maintenance.

[Paul]

Yes I did too, old habits and beliefs are hard to overcome.

[Mark_T]

I'm going to replace the coolant with Porsche Pink when I do the water pump in a couple of weeks.

The original coolant may very well be lifetime, but I don't know what it has been contaminated with through the years.