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Old 08-05-2010, 04:37 PM   #1
Scooby Newbie
Member#: 39924
Join Date: Jul 2003
Chapter/Region: BAIC
2003 WRX

Default Help with the accessory belt (Alt/PS) part number

I've been trying to buy these two belts for the 105k service and keep seeing different part number pop up all over the place. While everybody seems to agree on the K040353 (Gates Racing) for the A/C Belt, a PS/Alt Accessory Belt is listed differently...

This is for a 2003 2.0 WRX...

Gates Racing catalog:

GATES Part # K050345


RockAuto cross-references part# to show vehicle fitment, so here's what they have for these belts:
K050345 is listed for 2002-2009 WRX
K050350 - pre-2000
K050344 - 2.5Turbo models

K050350 - 9/16" x 35 5/8"
K050344 - 21/32" x 35"
K050345 - 21/32" x 35 1/4"

It seems like K050344 would work fine even though it is narrower by 1/4''... I've seen it recommended by one of the vendor, but can't recall where... due to that 1/4'' difference that allows for easier adjustment. Could anyone comment what part# they used and any issues/recommendations? Thank you!
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Old 08-06-2010, 12:13 AM   #2
Scooby Guru
Member#: 22412
Join Date: Aug 2002
Chapter/Region: SWIC
Location: Albuquerque, NM
2012 Legacy 2.5GT
Ice Silver Metallic


I used Subaru p/n 73323AC000 for the AC belt - it has the Subaru part number written on it, but it's made by Gates and has 4PK895 on it as well. I used Subaru p/n 809218270 for the alternator belt - it's made by Mitsuboshi and has 5PK877 R34-8 written on it. Since the OEM belts are only $15 each, I didn't see any reason to try and figure out which aftermarket belt would work (esp. since there's no performance benefit to be had, and the OEM ones install just fine...) - you are overthinking this.
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Old 08-06-2010, 12:56 PM   #3
Scooby Newbie
Member#: 39924
Join Date: Jul 2003
Chapter/Region: BAIC
2003 WRX


Thank you, you might be right... OEM is only a few bucks more in this case
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