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Oxygen Sensors
2003 Ford Thunderbird
Does anybody know if there is a difference between upstream and downstream when purchasing OEM Motorcraft
DY1401 and DY 1039.
It is very confusing and I'm trying to figure out which ones are for upstream and which ones are downstream. Some sites say DY1401 can be used for both upstream and downstream. Universal OEM. I'm lost please let me know if you have changed yours and can recommend brand and part number. Thank you
Birthday
September 13
Thunderbird Year
2003
Gender
Female
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