[Vehicle Fitment]: "Upstream/B1S1": Compatible with Subaru Forester 1998-1999 H4 2.5L, Impreza 1999 H4 2.2L (Non Calif-ESV), Impreza 1998-1999 H4 2.5L, Legacy 1996-1998 H4 2.2L, Legacy 1999 H4 2.2L (Non Calif-ESV), Legacy 1996-1999 H4 2.5L [Vehicle Fitment]: "Downstream/B1S2": Compatible with Subaru Impreza 1998 H4 2.2L [Reference Number]: 22690AA290, 22690AA350, 234-3091, 2343091, 250-23091, 25023091 [Specification]: ① Wire Quantity: 3; ② Overall Length: 425 mm; ③ Mounting Type: Threaded; ④ Sensor Type: Heated; ⑤ Connector Gender: Male; ⑥ Package Quantity: 1x Oxygen Sensor; ⑦ Packaging Type: Box [Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted O2 Oxygen Sensor. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind A-premium oxygen sensors are an ideal choice to replace your broken oxygen sensors. All oxygen sensors meet or exceed OEM specifications. Due to high manufacturing standard, it will come with one year quality guarantee.

Application:
Compatible with Forester 1998 H4 2.5L EJ25D Upstream
Compatible with Forester 1999 H4 2.5L EJ253 Upstream
Compatible with Impreza 1998 H4 2.5L EJ25D Downstream
Compatible with Impreza 1999 H4 2.5L EJ253 Upstream
Compatible with Impreza 1998 H4 2.2L EJ22EZ Downstream
Compatible with Impreza 1999 H4 2.2L EJ222 Upstream Non Calif-ESV
Compatible with Legacy 1996-1998 H4 2.2L Upstream
Compatible with Legacy 1996-1998 H4 2.5L Upstream
Compatible with Legacy 1999 H4 2.5L EJ25D Upstream
Compatible with Legacy 1999 H4 2.2L EJ22E Upstream Non Calif-ESV

OEM Number: 22690AA290, 22690AA350, 250-23091
Location: Upstream or Downstream
Quantity Sold: One Piece