Subaru Legacy Oxygen Sensor - Select Year

Position: Rear
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 -

Direct Fit - - After Catalyst - Before Catalyst - Square connector 3 Wire 17.83" Lead, (One hole in plug is left blank) -

Position: Front
Direct Fit - - #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Front
Direct Fit - - #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Front
Direct Fit - - #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Front
Direct Fit - - #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Front
Direct Fit - - #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Rear
Universal 4-Wire - - 4 Wire square female Plug - 4 Wire square female Plug 4 Wire square female Plug - At lower cat. outlet on non-Calif. model - Catalyst Outlet - Converter - OE Style - 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 -

Before Catalyst - Before Catalyst - (Air/Fuel Ratio Sensor) - Before Catalyst - 6 Pin Retangular plug (5 Wires Terminated) - Before Catalyst
6 Pin Retangular plug (5 Wires Terminated) - Located In Front of Front Catalyst. (Air/Fuel Ratio Sensor) -

Position: Rear
Direct Fit - - 4 Wire square female Plug - 4 Wire square female Plug 4 Wire square female Plug - Catalyst Outlet - Converter -

Position: Rear
Direct Fit - - After Catalyst. - At Catalyst Outlet - Located in Front Catalyst - Located in Front Catalyst (Turbo Outlet) - Located in Front Catalyst (Turbo Outlet) - Early production WRX - Wire lead and plug appears to be slightly different than 22690-AA520 - Occasionally production dates in Subaru overlap - Located in front Catalyst. - Located in Main Catalyst - Located in Rear Catalyst - Located in Rear Catalyst Located in Rear Catalyst - Rear Catalyst Outlet -

Position: Rear
Direct Fit - - Front and Rear - Square connector 3 Wire 17.83" Lead, (One hole in plug is left blank) - Square Connector, 3 Wire, (One hole in plug is left blank) -

Position: Rear
Direct Fit - - Front and Rear - Square connector 3 Wire 17.83" Lead, (One hole in plug is left blank) - Square Connector, 3 Wire, (One hole in plug is left blank) -

Position: Front
Direct Fit - - Front and Rear - Square connector 3 Wire 17.83" Lead, (One hole in plug is left blank) - Square Connector, 3 Wire, (One hole in plug is left blank) -

Position: Rear
Direct Fit - - Front and Rear - Square connector 3 Wire 17.83" Lead, (One hole in plug is left blank) - Square Connector, 3 Wire, (One hole in plug is left blank) -

Before Catalyst - On catalyst body. -

Position: Front
3 Wire Triangle Plug - - #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Front
3 Wire Triangle Plug - - #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Front
3 Wire Triangle Plug - - #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Front
3 Wire Triangle Plug - - #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Front
3 Wire Triangle Plug - - #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

-

Position: Rear
- 4 Wire square female Plug - 4 Wire square female Plug 4 Wire square female Plug - Catalyst Outlet - Converter -

-

-

Position: Front
- #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Front
- #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Front
- #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Front
- #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Front
- #2 O2 Sensor. - Located in the front of the front Catalyst. - #2 O2 Sensor. - Located in the front of front Catalyst - Before Catalyst
Triangle Connector - 3 Wire - Canada - Except California - Triangle Connector - 3 Wire - Catalyst Inlet- Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. - Except California - Canada - Triangle Connector - 3 Wire - Triangle Connector, 3 Wire - Triangle Connector, 3 Wire - Per the OE parts info, this should be a sensor with a 3-pin connector. We have received some reports that certain models may be equipped with a sensor with a 4-pin connector. If this is the case, use Denso sensor #234-9018 or equivalent. -

Position: Rear
- Front and Rear - Square connector 3 Wire 17.83" Lead, (One hole in plug is left blank) - Square Connector, 3 Wire, (One hole in plug is left blank) -

Position: Rear
- Front and Rear - Square connector 3 Wire 17.83" Lead, (One hole in plug is left blank) - Square Connector, 3 Wire, (One hole in plug is left blank) -

Position: Front
- Front and Rear - Square connector 3 Wire 17.83" Lead, (One hole in plug is left blank) - Square Connector, 3 Wire, (One hole in plug is left blank) -

Position: Rear
- Front and Rear - Square connector 3 Wire 17.83" Lead, (One hole in plug is left blank) - Square Connector, 3 Wire, (One hole in plug is left blank) -

- At Exhaust Manifold Outlet - At Exhaust Manifold Outlet - Exc. California - At Exhaust Manifold Outlet for non-California model - At front Catalyst Inlet - At front Catalyst Inlet for California model - Before Catalyst - Before Catalyst - (Air/Fuel Ratio Sensor) - Before Catalyst - 6 Pin Retangular plug (5 Wires Terminated) - Before Catalyst
6 Pin Retangular plug (5 Wires Terminated) - Located In Front of Front Catalyst. (Air/Fuel Ratio Sensor) -

Position: Rear
- Before Catalyst - Located in main Catalyst - Located: In Catalyst -

Position: Rear
- Before Catalyst - Located in main Catalyst - Located: In Catalyst -

Position: Rear
OE Type - - 4 Wire square female Plug - 4 Wire square female Plug 4 Wire square female Plug - Catalyst Outlet - Converter -

OE Type - - California Only - Square Plug - 4 Wire - Rear Catalyst Outlet - Rear Catalyst Outlet - California - Square Plug - 4 Wire - Square Plug - 4 Wire Square Plug - 4 Wire -

OE Type - - California Only - Square Plug - 4 Wire - Rear Catalyst Outlet - Rear Catalyst Outlet - California - Square Plug - 4 Wire - Square Plug - 4 Wire Square Plug - 4 Wire -

Position: Rear
OE Type - - California Only - Square Plug - 4 Wire - Rear Catalyst Outlet - Rear Catalyst Outlet - California - Square Plug - 4 Wire - Square Plug - 4 Wire Square Plug - 4 Wire -

OE Type - - California Only - Square Plug - 4 Wire - Rear Catalyst Outlet - Rear Catalyst Outlet - California - Square Plug - 4 Wire - Square Plug - 4 Wire Square Plug - 4 Wire -

Position: Rear
3 Wire Square Plug - - Front and Rear - Square connector 3 Wire 17.83" Lead, (One hole in plug is left blank) - Square Connector, 3 Wire, (One hole in plug is left blank) -

Position: Rear
3 Wire Square Plug - - Front and Rear - Square connector 3 Wire 17.83" Lead, (One hole in plug is left blank) - Square Connector, 3 Wire, (One hole in plug is left blank) -

Position: Front
3 Wire Square Plug - - Front and Rear - Square connector 3 Wire 17.83" Lead, (One hole in plug is left blank) - Square Connector, 3 Wire, (One hole in plug is left blank) -

Position: Rear
3 Wire Square Plug - - Front and Rear - Square connector 3 Wire 17.83" Lead, (One hole in plug is left blank) - Square Connector, 3 Wire, (One hole in plug is left blank) -

Position: Rear
OE Type - - After Catalyst. - At Catalyst Outlet - Located in Front Catalyst (Turbo Outlet) - Located in front Catalyst. - Located in Main Catalyst - Located in Rear Catalyst - Located in Rear Catalyst Located in Rear Catalyst - Rear Catalyst Outlet -

- 4 Wire Square Plug - Before Catalyst - Before Catalyst (at front Catalyst Inlet) - Before Catalyst - At Front Catalyst Inlet - California - California Only - California Only - 4 Wire Square Plug -

Position: Front
- 4 Wire Square Plug - Before Catalyst - Before Catalyst (at front Catalyst Inlet) - Before Catalyst - At Front Catalyst Inlet - California - California Only - California Only - 4 Wire Square Plug -

- 4 Wire Square Plug - Before Catalyst - Before Catalyst (at front Catalyst Inlet) - Before Catalyst - At Front Catalyst Inlet - California - California Only - California Only - 4 Wire Square Plug -

- Before Catalyst - Located in Front Catalyst (Turbo Outlet) - Early production WRX - Wire lead and plug appears to be slightly different than 22690-AA520 - Occasionally production dates in Subaru overlap - Located in main Catalyst - Located: In Catalyst -

Position: Rear
- Before Catalyst - Located in Front Catalyst (Turbo Outlet) - Early production WRX - Wire lead and plug appears to be slightly different than 22690-AA520 - Occasionally production dates in Subaru overlap - Located in main Catalyst - Located: In Catalyst -

- Before Catalyst - Located in Front Catalyst (Turbo Outlet) - Early production WRX - Wire lead and plug appears to be slightly different than 22690-AA520 - Occasionally production dates in Subaru overlap - Located in main Catalyst - Located: In Catalyst -

Position: Rear
- Before Catalyst - Located in Front Catalyst (Turbo Outlet) - Early production WRX - Wire lead and plug appears to be slightly different than 22690-AA520 - Occasionally production dates in Subaru overlap - Located in main Catalyst - Located: In Catalyst -

Position: Front
OE Type - Before Catalyst - Before Catalyst - At Front Catalyst - Before Catalyst - At Front Catalyst Inlet -

Position: Front
4 Wire black Connector - 4 Wire Black square Connector - Large Washer - Part number stamped on part -

Position: Front
- After Catalyst - Air Fuel Ratio Sensor - Before Catalyst - Front Air Fuel Ratio Sensor - Front of Primary Converter. - OE Style - After Catalyst - OE Style - After Catalyst - 5-Speed - OE Style - After Catalyst - LE & XLE - OE Style - Before Catalyst - Rear Bank AFTER Catalysts are O2 sensors, C5010 -

Position: Front
4 Wire Grey Square Connector -Standard Washer- Part number stamped on part -

Position: Front
Before Catalyst - Before Catalyst - At Front Catalyst - Before Catalyst - At Front Catalyst Inlet -