Mazda Millenia Oxygen Sensor - Select Year

Position: Rear Right
Universal Fit - - 2WD - 2WD - California - 2WD - Exc. California - 4 Wire square female Plug - 4 Wire square female Plug 4 Wire square female Plug - 4WD - 4WD - California - After Catalyst - After Catalyst - California - After Catalyst - Firewall side - In Exhaust Pipe - After Catalyst
Right - At Front Exhaust Manifold Outlet - Radiator Side - At lower cat. outlet on non-Calif. model - At Rear Catalyst Outlet - At Rear Catalyst Outlet - Exc. California - Before Catalyst - Before Catalyst - California - Before Catalyst - Firewall Side - On Exhaust Pipe - Before Catalyst - Firewall Side - On Exhaust Pipe - Federal - Before Catalyst - Radiator Side - On Exhaust Pipe - Before Catalyst - Radiator Side - On Exhaust Pipe - Federal - California - California - 2WD - California - Wagon only - California Emissions - California Emissions - w/29.8" Pigtail - Catalyst Outlet - Converter - Exc. California Wagon - Exc. Canada Built - Exc. Canada Built w/ Regular or Flex Fuel Engine - Except Mexico of Canadian Built Vehicle
(After Catalyst) - Except Mexico or Canadian Built Vehicle
(After Catalyst) - Front - Radiator Side - Front - Radiator Side - Front - 2 Required Rear - 2 Required - Front Catalyst Outlet - California - 2WD - GVW under 8500 Lbs. - In Header Pipe - In Header Pipe - 4WD - In Header Pipe - California - In Header Pipe - California - 4WD - In Header Pipe - Exc. California - Located at Manifold - Non-California - OE Style - OE Style - 4-Wire - OE Style - 4R70 - OE Style - California & Massachusetts - OE Style - California & Massachusetts - Under 8500 lbs. GVW - OE Style - California & Massashusetts - OE Style - California FLEX - OE Style - Exc. Califonia - OE Style - Exc. California - FLEX E40D - OE Style - Flex - OE Style - Under 8500 Lbs. GVW - California & Massachusetts - OE Style 4-Wire - OE Style 4-Wire - Located at Exhaust Pipe - On Exhaust Manifold - Radiator Side - On Exhaust Pipe - Rear - Firewall Side - Rear - Firewall Side - w/ Canada Built - w/ Electronic Automatic Transmission - w/ Electronic Transmission -

Position: Front Left
Universal Fit - - 0 258 003 049 - 3 Wire - Heated - 3 Wire - Heated - GT - 3 Wire - Heated - HT & RD Engines - 3 Wire - Heated - Mexico Production PL/9A Engine - 3 Wire - Heated - USA Production RD/PL Engine - 3 Wire - Heated 3 Wire - Heated USA Production - RD/PL Engine - 3 Wire - Heated MC Engine - 3 Wire - Heated MG Engine - 3 Wire - Universal OE Type with Connector Before Catalyst - 520mm : 3 wire : 0 258 003 008 - 9A Engine - Before Catalyst - Before Catalyst - California - Before Catalyst - Exc. 1994 Convertible - Before Front Catalyst - Radiator Side - in Exhaust Manifold. - Federal - German Production - 9A Engine - German Production - PL Engine - German Production - PL/RD Engine - Length of Wiring Harness 13" - Length of Wiring Harness 13" Can use sensor with longer wire harness, see chart on page 6 OE Type with connector before Catalyst - NF Engine - NG Engine - OE Style - 3-Wire - OE Style 3-Wire - Universal - 3 Wire - Universal 3 Wire - 461709 Chassis Range - Universal 3 Wire - 541365 Chassis Range - Universal 3 Wire - Front of Catalyst -

Position: Rear Right
Direct Fit - After Catalyst - Federal - After Catalyst - Firewall side - In Exhaust Pipe - After Rear Catalyst - After Rear Catalyst - Federal -

Position: Rear Right
Universal Fit - - After Catalyst - After Catalyst - AKB Engine Two Required - After Catalyst - ATQ Engine - After Catalyst - Firewall side - In Exhaust Pipe - At Catalyst Inlet - At Catalyst Outlet - At Exhaust Mainfold - Firewall Side - Auxiliary Engine - Before Cat. - Before Catalyst Located in manifold/exhaust pipe before catalyst. - Before Front Catalyst - On Exhaust Manifold - California Emissions - California Emissions - w/ 38.8" Pigtail - Exc. California - Exc. California Emissions - Located in manifold/exhaust pipe before catalyst. - Need to check the old Oxygen Sensor for number.Old one should be marked F85F-9G444-BA. (Up Stream) - Need to check the old Oxygen Sensor for number.Old one should be marked F8TF-9G444-CA. (Up Stream) - This application also requires an air fuel mixture ratio sensor, part # 89467-0C010. Do NOT get these confused, they are NOT inter- changeable. - Two Required - Universal - 3 Wire - Universal 3 Wire - 461709 Chassis Range - Universal 3 Wire - 541365 Chassis Range - Universal 3 Wire - Front of Catalyst -

Position: Rear Right
Universal Type - After Catalyst - After Catalyst - Firewall side - In Exhaust Pipe - At Catalyst Inlet - Before Catalyst Located in manifold/exhaust pipe before catalyst. - Before Front Catalyst - On Exhaust Manifold - Located in manifold/exhaust pipe before catalyst. - Universal - 3 Wire - Universal 3 Wire - 461709 Chassis Range - Universal 3 Wire - 541365 Chassis Range - Universal 3 Wire - Front of Catalyst -

Position: Front Left
Universal - - Before Catalyst - Before Catalyst - California - Before Front Catalyst - Radiator Side - in Exhaust Manifold. - OE Style - 3-Wire -

Position: Front Left
Universal - - 3 Wire - Heated - 3 Wire - Heated - GT - 3 Wire - Heated - HT & RD Engines - 3 Wire - Heated - Mexico Production PL/9A Engine - 3 Wire - Heated - USA Production RD/PL Engine - 3 Wire - Heated 3 Wire - Heated USA Production - RD/PL Engine - 3 Wire - Heated MC Engine - 3 Wire - Heated MG Engine - 9A Engine - Before Catalyst - Before Front Catalyst - Radiator Side - in Exhaust Manifold. - Federal - German Production - 9A Engine - German Production - PL Engine - German Production - PL/RD Engine - NF Engine - NG Engine - OE Style 3-Wire - Universal - 3 Wire - Universal 3 Wire - 461709 Chassis Range - Universal 3 Wire - 541365 Chassis Range - Universal 3 Wire - Front of Catalyst -

Position: Rear Right
OE Type - After Catalyst - Federal - After Catalyst - Firewall side - In Exhaust Pipe - After Front Catalyst in Exhaust Pipe - Front Bank. (Radiator Side) - After Rear Catalyst - After Rear Catalyst - Federal - After Rear Catalyst On Exhaust Pipe - Before Catalyst - Firewall Side - On Exhaust Manifold - Before Catalyst - Firewall Side - on Exhaust Manifold. -

Position: Rear Left
OE Type - After Catalyst - Federal - After Catalyst - Firewall side - In Exhaust Pipe - After Front Catalyst in Exhaust Pipe - Front Bank. (Radiator Side) - After Rear Catalyst - After Rear Catalyst - Federal - After Rear Catalyst On Exhaust Pipe - Before Catalyst - Firewall Side - On Exhaust Manifold - Before Catalyst - Firewall Side - on Exhaust Manifold. -

Position: Rear Right
Universal 4-Wire - - After Catalyst - After Catalyst - Non-California - After Catalyst - California - After Catalyst - Federal - After Catalyst - Firewall side - In Exhaust Pipe - After Catalyst - Non- California - After Catalyst - Non-California - After Front Catalyst - On Exhaust Pipe - Before Rear Catalyst - After Front Catalyst - On Exhaust Pipe - California - After Rear Catalyst - After Rear Catalyst - Federal - Before Catalyst - Federal - Before Catalyst - Firewall Side - In Exhaust Manifold - Before Catalyst - Firewall Side - On Exhaust Pipe - Before Catalyst - Firewall Side - On Exhaust Pipe - Federal - Before Catalyst - On Exhaust Pipe - Before Catalyst - Radiator Side - In Exhaust Y Pipe - Before Catalyst - Radiator Side - On Exhaust Pipe - Before Catalyst - Radiator Side - On Exhaust Pipe - Federal - Before Front Catalyst - Firewall Side (Front Oxygen Sensor - Rear of Y Pipe) on Exhaust Pipe. FEDERAL - Before Front Catalyst - Firewall Side (Rear of Y Pipe) - On Exhaust Pipe - Before Front Catalyst - Firewall Side - California - Before Front Catalyst - Firewall Side - On Exhaust Pipe - Before Front Catalyst - On Exhaust Manifold - Before Front Catalyst - Radiator Side - Before Front Catalyst - Radiator Side (Front of Y Pipe) - On Exhaust Pipe - Before Front Catalyst - Radiator Side (Front Oxygen Sensor Front Of Y Pipe) - on Exhaust Pipe. FEDERAL - Before Front Catalyst - Radiator Side - On Exhaust Pipe - California - OE Style - OE Style - 4-Wire - OE Style - 4-Wire - w/ Low Level Emissions - OE Style 4-Wire - OE Style 4-Wire - California - OE Style 4-Wire - Exc. California - OE Style 4-Wire - w/ Flex Fuel - OE Style 4-Wire - w/ Low Level Emissions - OE Style Front Over 8500 Lbs. GVW - Radiator Side - On Exhaust Pipe -

Position: Front Right
Universal 4-Wire - - After Catalyst - After Catalyst - Non-California - After Catalyst - California - After Catalyst - Federal - After Catalyst - Firewall side - In Exhaust Pipe - After Catalyst - Non- California - After Catalyst - Non-California - After Front Catalyst - On Exhaust Pipe - Before Rear Catalyst - After Front Catalyst - On Exhaust Pipe - California - After Rear Catalyst - After Rear Catalyst - Federal - Before Catalyst - Federal - Before Catalyst - Firewall Side - In Exhaust Manifold - Before Catalyst - Firewall Side - On Exhaust Pipe - Before Catalyst - Firewall Side - On Exhaust Pipe - Federal - Before Catalyst - On Exhaust Pipe - Before Catalyst - Radiator Side - In Exhaust Y Pipe - Before Catalyst - Radiator Side - On Exhaust Pipe - Before Catalyst - Radiator Side - On Exhaust Pipe - Federal - Before Front Catalyst - Firewall Side (Front Oxygen Sensor - Rear of Y Pipe) on Exhaust Pipe. FEDERAL - Before Front Catalyst - Firewall Side (Rear of Y Pipe) - On Exhaust Pipe - Before Front Catalyst - Firewall Side - California - Before Front Catalyst - Firewall Side - On Exhaust Pipe - Before Front Catalyst - On Exhaust Manifold - Before Front Catalyst - Radiator Side - Before Front Catalyst - Radiator Side (Front of Y Pipe) - On Exhaust Pipe - Before Front Catalyst - Radiator Side (Front Oxygen Sensor Front Of Y Pipe) - on Exhaust Pipe. FEDERAL - Before Front Catalyst - Radiator Side - On Exhaust Pipe - California - OE Style - OE Style - 4-Wire - OE Style - 4-Wire - w/ Low Level Emissions - OE Style 4-Wire - OE Style 4-Wire - California - OE Style 4-Wire - Exc. California - OE Style 4-Wire - w/ Flex Fuel - OE Style 4-Wire - w/ Low Level Emissions - OE Style Front Over 8500 Lbs. GVW - Radiator Side - On Exhaust Pipe -

Position: Front Left
Universal 4-Wire - - After Catalyst - After Catalyst - Non-California - After Catalyst - California - After Catalyst - Federal - After Catalyst - Firewall side - In Exhaust Pipe - After Catalyst - Non- California - After Catalyst - Non-California - After Front Catalyst - On Exhaust Pipe - Before Rear Catalyst - After Front Catalyst - On Exhaust Pipe - California - After Rear Catalyst - After Rear Catalyst - Federal - Before Catalyst - Federal - Before Catalyst - Firewall Side - In Exhaust Manifold - Before Catalyst - Firewall Side - On Exhaust Pipe - Before Catalyst - Firewall Side - On Exhaust Pipe - Federal - Before Catalyst - On Exhaust Pipe - Before Catalyst - Radiator Side - In Exhaust Y Pipe - Before Catalyst - Radiator Side - On Exhaust Pipe - Before Catalyst - Radiator Side - On Exhaust Pipe - Federal - Before Front Catalyst - Firewall Side (Front Oxygen Sensor - Rear of Y Pipe) on Exhaust Pipe. FEDERAL - Before Front Catalyst - Firewall Side (Rear of Y Pipe) - On Exhaust Pipe - Before Front Catalyst - Firewall Side - California - Before Front Catalyst - Firewall Side - On Exhaust Pipe - Before Front Catalyst - On Exhaust Manifold - Before Front Catalyst - Radiator Side - Before Front Catalyst - Radiator Side (Front of Y Pipe) - On Exhaust Pipe - Before Front Catalyst - Radiator Side (Front Oxygen Sensor Front Of Y Pipe) - on Exhaust Pipe. FEDERAL - Before Front Catalyst - Radiator Side - On Exhaust Pipe - California - OE Style - OE Style - 4-Wire - OE Style - 4-Wire - w/ Low Level Emissions - OE Style 4-Wire - OE Style 4-Wire - California - OE Style 4-Wire - Exc. California - OE Style 4-Wire - w/ Flex Fuel - OE Style 4-Wire - w/ Low Level Emissions - OE Style Front Over 8500 Lbs. GVW - Radiator Side - On Exhaust Pipe -

Position: Rear Right
OE Style - After Front Catalyst - Radiator Side - In Exhaust Y Pipe - Before Catalyst - Radiator Side - In Exhaust Y Pipe - Before Front Catalyst - On Exhaust Manifold -

Position: Front Left
OE Style - After Front Catalyst - Radiator Side - In Exhaust Y Pipe - Before Catalyst - Radiator Side - In Exhaust Y Pipe - Before Front Catalyst - On Exhaust Manifold -

Position: Rear Right
Universal 4-Wire - - 2WD - 2WD - California - 2WD - Exc. California - 4WD - 4WD - California - After Catalyst - After Catalyst - California - After Catalyst - Firewall side - In Exhaust Pipe - At Front Exhaust Manifold Outlet - Radiator Side - Before Catalyst - Before Catalyst - California - Before Catalyst - Firewall Side - On Exhaust Pipe - Before Catalyst - Firewall Side - On Exhaust Pipe - Federal - Before Catalyst - Radiator Side - On Exhaust Pipe - Before Catalyst - Radiator Side - On Exhaust Pipe - Federal - California - California - 2WD - California - Wagon only - California Emissions - California Emissions - w/29.8" Pigtail - Exc. California Wagon - Front - Radiator Side - Front - Radiator Side - Front Catalyst Outlet - California - 2WD - In Header Pipe - In Header Pipe - 4WD - In Header Pipe - California - In Header Pipe - California - 4WD - In Header Pipe - Exc. California - Non-California - On Exhaust Manifold - Radiator Side - On Exhaust Pipe - Rear - Firewall Side - Rear - Firewall Side -

Position: Front Left
Before Front Catalyst - Radiator Side - in Exhaust Manifold. -

Position: Front Left
OE Style 4-Wire - Before Front Catalyst - Firewall Side - California - Before Front Catalyst - Radiator Side - Before Front Catalyst - Radiator Side - in Exhaust Manifold. -

Position: Front Right
Direct Fit - Before Catalyst - Firewall side - in Exhaust Manifold. -

Position: Rear Right
- After Catalyst - Between Front & Rear Catalyst - California - After Front Catalyst - Firewall Side - In Exhaust Pipe - OE Style - On Exhaust Pipe -

Position: Rear Right
After Front Catalyst - Firewall Side - In Exhaust Pipe - OE Style -

Position: Rear Left
OE Type - After Catalyst - Radiator Side - In Exhaust Pipe - Before Catalyst - Federal - Before Catalyst - Radiator Side - In Exhaust Y Pipe - Before Front Catalyst - On Exhaust Manifold -

Position: Front Left
OE Type - After Catalyst - Radiator Side - In Exhaust Pipe - Before Catalyst - Federal - Before Catalyst - Radiator Side - In Exhaust Y Pipe - Before Front Catalyst - On Exhaust Manifold -

Position: Rear Right
OE Type - After Catalyst - Below Front Catalyst - After Catalyst - Below Front Catalyst - Federal - After Catalyst - Between Front & Rear Catalyst - California - After Catalyst - Between Front & Rear Catalyst - Federal - After Front Catalyst - Firewall Side - In Exhaust Pipe - After Front Catalyst - Firewall side - In Exhaust Y Pipe - After Front Catalyst in Exhaust Pipe - Rear Bank. (Firewall Side) - OE Style - On Exhaust Pipe -

Position: Rear Right
OE Type - After Catalyst - Below Front Catalyst - After Catalyst - Below Front Catalyst - Federal - After Catalyst - Between Front & Rear Catalyst - California - After Catalyst - Between Front & Rear Catalyst - Federal - After Front Catalyst - Firewall Side - In Exhaust Pipe - After Front Catalyst - Firewall side - In Exhaust Y Pipe - After Front Catalyst in Exhaust Pipe - Rear Bank. (Firewall Side) - OE Style - On Exhaust Pipe -

Position: Rear Right
OE Type - After Catalyst - Below Front Catalyst - After Catalyst - Below Front Catalyst - Federal - After Catalyst - Between Front & Rear Catalyst - California - After Catalyst - Between Front & Rear Catalyst - Federal - After Front Catalyst - Firewall Side - In Exhaust Pipe - After Front Catalyst - Firewall side - In Exhaust Y Pipe - After Front Catalyst in Exhaust Pipe - Rear Bank. (Firewall Side) - OE Style - On Exhaust Pipe -

Position: Front Right
OE type, 3 wire - Before Catalyst - Firewall side - in Exhaust Manifold. -

Position: Rear Right
OE Type - - Before Catalyst - Firewall side - In Exhaust Y Pipe -

Position: Front Left
OE type, 3 wire - Before Catalyst - Radiator Side - in Exhaust Manifold. -

Position: Front Right
Before Catalyst - Firewall Side - In Exhaust Manifold -

Position: Front Left
OE Type - Before Catalyst - Radiator Side - in Exhaust Manifold. -

Position: Front Right
OE Type - Before Catalyst - Firewall side - in Exhaust Manifold. - Before Front Catalyst - Radiator Side - in Exhaust Manifold. -

Position: Front Left
OE Type - Before Catalyst - Firewall side - in Exhaust Manifold. - Before Front Catalyst - Radiator Side - in Exhaust Manifold. -

Position: Front Right
OE Type - Before Front Catalyst - Firewall side - in Exhaust Manifold. -

Position: Rear
OE Type - In Main Catalytic Convertor Rear Pipe. -

Position: Front Right
OE type - Before Catalyst - Firewall side - in Exhaust Manifold. - Before Front Catalyst - On Exhaust Manifold - Before Front Catalyst - Radiator Side - in Exhaust Manifold. - Universal - 3 Wire - Universal 3 Wire - 461709 Chassis Range - Universal 3 Wire - 541365 Chassis Range - Universal 3 Wire - Front of Catalyst -

Position: Front Left
OE type - Before Catalyst - Firewall side - in Exhaust Manifold. - Before Front Catalyst - On Exhaust Manifold - Before Front Catalyst - Radiator Side - in Exhaust Manifold. - Universal - 3 Wire - Universal 3 Wire - 461709 Chassis Range - Universal 3 Wire - 541365 Chassis Range - Universal 3 Wire - Front of Catalyst -

Position: Front Right
OE Style 4-Wire - Before Front Catalyst - Firewall side - in Exhaust Manifold. - On Front Pipe Assembly -

Position: Front Left
Before Catalyst - Radiator Side - In Exhaust Y Pipe -

Position: Rear Right
After Catalyst - Firewall side - In Exhaust Pipe -

Position: Front Left
Before Catalyst - Radiator Side - In Exhaust Y Pipe -