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2G AC compressor part number help ‘98 GST

SeaveeDSM

Supporting VIP
227
24
Dec 22, 2008
Miami, Florida
Hello all,

On my 1998 Eclipse GST I’m in the process of replacing basically all of my AC components including putting in a new AC compressor. Have not yet pulled the old OEM compressor but from looking at top and bottom of it I don’t see any tag or label on it. I’m the original owner of the car and know it is still the OEM compressor in there.

The belt/pulley look to be 4 ribs and the black electrical plug connecting to the top side of the compressor has 3 wires on it. I’ve been looking at several Mitsubishi dealer parts websites and am a little confused about the exact part # that corresponds to my OEM compressor. I’m not sure if it’s MR360245 or perhaps MR315815. There is yet another one MR201716 but it may not be for the turbo models or perhaps it’s for the older ones prior to ‘97…. Supposedly the compressors on 95-96 2Gs were different than 97-99.

i won’t be buying Mitsubishi OEM new and will get something aftermarket. Rockauto has three different vendors with new compressor kits and 2 of the 3 seem to be the same but a third is different.

Can anyone assist confirming the correct Mitsubishi compressor part # for my ‘98 Eclipse GST so I can hopefully cross reference that to the correct available aftermarket part(s)?
 
Last edited:

dwb

Proven Member
32
11
Sep 9, 2021
Broomfield, Colorado
AC compressor for 1996.07.1 - 1999.04.3 should be MR315815.

BTW, I replaced the compressor on my 91 this last spring, got it from a seller on Amazon "BUYAUTOPARTS!" It was a factory new Denso and I was pleasantly surprised.
 

SeaveeDSM

Supporting VIP
227
24
Dec 22, 2008
Miami, Florida
Thanks for the quick reply. I found BUYAUTOPARTS on both Amazon and it’s direct website. That P/N MR315815 does in fact seem to correspond with the compressor I need for my car.

Just ordered the compressor from them and will let folks know if it too seems to be a DENSO unit etc.
 
Last edited:

dwb

Proven Member
32
11
Sep 9, 2021
Broomfield, Colorado
Some good info in this thread: https://www.dsmtuners.com/threads/resolved-a-c-refrigerant-capacity.343157/

Keep in mind if you are buying a new compressor, it likely will already be full of oil. I think enough for the entire dry system (but don't quote me on that). I removed some oil from the new compressor when I did mine as the lines and condenser still had some left over. Don't want to put too much in there.
 

SeaveeDSM

Supporting VIP
227
24
Dec 22, 2008
Miami, Florida
Got it, I plan to drain all the oil it came shipped with and refill with fresh PAG oil to the spec. Now the PITA of removing all the old and installing all the new components.
Compressor, condenser, evaporator core and expansion valve, drier, a couple of the lines. All but the compressor I already have from RockAuto. I probably could just have found and fixed the leak but the car is now 23 years old, I am hanging on to it, live in Miami where good reliable AC is a necessity and I just don’t want to deal with it piecemeal.
 

spyderdrifter

Supporting Member
5,126
650
Jul 11, 2009
Some where, Colorado
Wish I saw this yesterday. I have a brand new compressor I've decided not to use and sell since I'm gonna convert to electric A/C.
 
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