When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The PCV valve for the RX300 2000 vintage was originally part number 12204-20010, then that part was superseded with the RED valve, part 12204-20020. Anybody know the difference?
If they're both the "push in" style that sits in the rubber grommet, maybe it was a vendor change with Toyota??
Otherwise, the valve base did change to a screw in style which is only compatible with a different valve cover design.