HomeEmission Control > SensorsSpectra OS5369 Oxygen Sensor - Downstream, Upstream or Upstream Front
Part #: OS5369

Spectra OS5369 Oxygen Sensor - Downstream, Upstream or Upstream Front

Downstream
⚙️ 8 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$20.84Free 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: Mazda, MPV, Protege, and MX-3
🔄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 Mazda MPV, MX-3, and Protege

The Spectra OS5369 oxygen sensor is designed to provide accurate emissions monitoring for select Mazda vehicles. Engineered to meet OEM specifications, this sensor supports efficient engine performance and emission control in Mazda MPV, MX-3, and Protege models.

  • Compatible with Mazda MPV, MX-3, and Protege models
  • Part number OS5369 ensures precise fitment and function
  • Monitors oxygen levels in exhaust gases for optimal fuel mixture
  • Supports emission control system compliance
  • Durable construction for long service life

Product Details and Functionality

The Spectra OS5369 oxygen sensor is a critical component in the emission control system of Mazda MPV, MX-3, and Protege vehicles. It measures the oxygen content in the exhaust stream, allowing the engine control unit to adjust the air-fuel ratio for efficient combustion. This sensor helps maintain proper engine performance, reduces harmful emissions, and supports fuel economy. The OS5369 is manufactured to meet strict quality standards, ensuring reliable operation under various driving conditions.

Common Applications and Issues Addressed

  • Helps resolve rough idling and engine hesitation
  • Reduces excessive fuel consumption caused by incorrect air-fuel mixture
  • Prevents emission test failures due to faulty sensor readings
  • Mitigates check engine light triggers related to oxygen sensor faults
  • Supports smooth engine acceleration and performance

Installation Notes and Tips

When installing the Spectra OS5369 oxygen sensor, ensure the vehicle is compatible with the part number and model fitment. Use proper tools to avoid damaging the sensor or wiring harness. It is recommended to replace the sensor when the engine is cool to prevent burns. Verify all electrical connections are secure and free of corrosion. After installation, clear any diagnostic trouble codes and perform a test drive to confirm proper sensor operation.

Quality Assurance and Warranty

Spectra oxygen sensors are manufactured to meet or exceed OEM standards for durability and performance. The OS5369 part undergoes rigorous testing to ensure consistent sensor output and longevity. This product typically includes a limited warranty covering defects in materials and workmanship, providing confidence in its reliability for emission control applications in Mazda MPV, MX-3, and Protege vehicles.

This part fits 8 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2001MazdaMPV2.5LV6DownstreamLocated After Catalytic Converter; w/ Federal Emissions
2000MazdaMPV2.5LV6DownstreamLocated After Catalytic Converter; w/ Federal Emissions
2000MazdaProtege1.8LL4Upstream
1999MazdaProtege1.8LL4Upstream
1995MazdaMX-31.8LV6Upstream Front
1994MazdaMX-31.8LV6Upstream Front
1993MazdaMX-31.8LV6Upstream Front
1992MazdaMX-31.8LV6Upstream Front

* 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:

1386713935139701531721314942252323441435S36105S3627752399752569752834ES20179FP4918861FP49188619UFP4918861CAGY0618861GY0618861AGY0618861A9UGY0618861ACAK80618861AK80618861A9UK83718861OS1735OS1760SG1006SG1006TSG981SG981TSU4592SU5246

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