HomeEmission Control > SensorsSpectra OS5197 Oxygen Sensor - Downstream or Upstream
Part #: OS5197

Spectra OS5197 Oxygen Sensor - Downstream or Upstream

Downstream and Upstream
⚙️ 21 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$20.62Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Subaru, Forester, Impreza, and Legacy
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Oxygen Sensor for Subaru Forester, Impreza, and Legacy

The Spectra OS5197 oxygen sensor is designed to provide accurate emissions monitoring for select Subaru models. Engineered to meet OEM specifications, this sensor helps maintain optimal engine performance and emissions control.

Key Features of Spectra OS5197 Oxygen Sensor

  • Compatible with Subaru Forester, Impreza, and Legacy models
  • Direct replacement oxygen sensor for emission control systems
  • Ensures precise air-fuel mixture readings for efficient combustion
  • Durable construction for long-lasting performance
  • Part number OS5197 for easy identification and fitment

Detailed Product Description

The Spectra OS5197 oxygen sensor is an essential component in the emission control system of Subaru Forester, Impreza, and Legacy vehicles. It monitors the oxygen levels in the exhaust gases, providing real-time data to the engine control unit (ECU). This data allows the ECU to adjust the air-fuel mixture for optimal combustion, reducing harmful emissions and improving fuel efficiency. The sensor is manufactured to meet strict quality standards, ensuring reliable operation under various driving conditions. Using the correct oxygen sensor like the OS5197 helps maintain engine performance and complies with emission regulations.

Common Issues Addressed by the Spectra OS5197 Oxygen Sensor

  • Check engine light triggered by faulty oxygen sensor readings
  • Poor fuel economy due to incorrect air-fuel mixture
  • Rough engine idle or hesitation during acceleration
  • Failed emissions tests related to exhaust gas composition
  • Increased exhaust emissions impacting environmental compliance

Installation Notes and Tips

When replacing the oxygen sensor on Subaru Forester, Impreza, or Legacy models, ensure the engine is cool to avoid burns. Use an oxygen sensor socket or appropriate tool to remove the old sensor carefully. Apply anti-seize compound to the threads of the new OS5197 sensor if not pre-coated, avoiding contamination of the sensor tip. Verify proper electrical connections and clear any diagnostic trouble codes after installation to reset the ECU.

Quality Assurance and Warranty Information

The Spectra OS5197 oxygen sensor is manufactured to meet or exceed OEM standards for fit, form, and function. While specific warranty details are not provided, Spectra products typically undergo rigorous testing to ensure durability and performance. Using this sensor supports maintaining your Subaru vehicle’s emission system integrity and compliance.

This part fits 21 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1998SubaruForester2.5LH4Downstream
1998SubaruImpreza2.5LH4Downstream
1998SubaruImpreza2.2LH4Downstream
1998SubaruLegacy2.5LH4Downstream
1998SubaruLegacy2.2LH4Downstream
1997SubaruImpreza2.2LH4Upstream
1997SubaruImpreza2.2LH4Downstream
1997SubaruImpreza1.8LH4Upstream
1997SubaruImpreza1.8LH4Downstream
1997SubaruLegacy2.5LH4Downstream
1997SubaruLegacy2.2LH4Downstream
1996SubaruImpreza2.2LH4Upstream
1996SubaruImpreza2.2LH4Downstream
1996SubaruImpreza1.8LH4Upstream
1996SubaruImpreza1.8LH4Downstream
1996SubaruLegacy2.5LH4Downstream
1996SubaruLegacy2.2LH4Downstream
1995SubaruImpreza2.2LH4Upstream
1995SubaruImpreza2.2LH4Downstream
1995SubaruLegacy2.2LH4Upstream
1995SubaruLegacy2.2LH4Downstream

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

13445213127722690AA2202343088245205S3917751648ES10439OS855SG176SG176TSU4687

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.