Upstream Or Downstream O2 Oxygen Sensor For Mazda Millenia Protege Kia Sephia – 4-Wire, Direct Fit

This 4-wire narrowband oxygen sensor fits a range of Mazda and Kia models including Millenia (1995-2002), Protege, Miata (2001-2005 naturally aspirated only), and Sephia (1996-1997).

Can be used as upstream or downstream depending on your application — B1S1 or B1S2.

Heated sensor, M18 thread, female connector with blade and bullet terminals.

Includes wire harness and stainless steel protective sleeve.

Features double sealing technology with gaskets and rubber plugs.

735mm wiring harness length.

Brand is unbranded but meets OEM fit.

1-year warranty.

Direct replacement, easy install.

Not for turbocharged Miata.