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Old 09-17-2012, 10:58 AM   #3
ECSTuning
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Join Date: Jul 2008
Location: Wadsworth, Ohio
Posts: 5,550
My Ride: BMW
HERE is a link to the Thermostats with Housings I currently have avaible for your 03 325. Keep in mind when replacing the housings also a goo idea to replace the gasket.

For your oxygen sensor, keep in mind the front and rear position sensors are different, and there is also a split in 3/2003 (build date) which causes a different sensors to be used. HERE is a link to the ones available for your car. Note the writing in red on the page shows which build date each sensor is for.

If you need help figuring out your build date PM me the last 7 digits of your vin or post them here and I'll help you out.
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