HomeEmission Control > SensorsSpectra OS5018 Oxygen Sensor - Upstream, Upstream Left or Upstream Right
Part #: OS5018

Spectra OS5018 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Upstream, Upstream Right, and Upstream Left
⚙️ 19 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: BMW, 318is, 325i, 325is, 325iX, and 850CSi
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Reliable Oxygen Sensor for BMW 318is, 325i, 325is, 325iX, and 850CSi

The Spectra OS5018 oxygen sensor is designed to provide accurate emissions monitoring for select BMW models. This sensor helps maintain optimal engine performance and ensures compliance with emission standards.

  • Compatible with BMW 318is, 325i, 325is, 325iX, and 850CSi models
  • Part number OS5018 for precise identification
  • Monitors oxygen levels in exhaust gases for efficient fuel management
  • Durable construction for consistent sensor performance
  • Direct replacement sensor for emission control systems

Product Details and Functionality

The Spectra OS5018 oxygen sensor plays a critical role in the emission control system by measuring the oxygen content in the exhaust stream. This data is sent to the engine control unit (ECU) to adjust the air-fuel mixture, improving combustion efficiency and reducing harmful emissions. Designed specifically for BMW 318is, 325i, 325is, 325iX, and 850CSi vehicles, this sensor ensures compatibility and reliable operation within the factory emission system.

Common Applications and Issues Addressed

  • Helps resolve rough idling and engine hesitation
  • Reduces increased fuel consumption caused by faulty sensors
  • Prevents failed emissions tests due to inaccurate oxygen readings
  • Addresses check engine light triggers related to oxygen sensor faults
  • Supports smoother engine performance and reduced exhaust emissions

Installation Notes and Tips

When installing the Spectra OS5018 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the sensor wiring. Verify the sensor connector matches the vehicle harness for a secure fit. 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 OEM specifications for fit and function. While specific warranty details are not provided, Spectra products typically undergo quality control testing to ensure durability and performance in emission control applications.

This part fits 19 vehicles. Search below:

YearMakeModelBody TypeLitersCylindersPositionNotes
1995BMW850CSi5.6LV12Upstream Right
1995BMW850CSi5.6LV12Upstream Left
1994BMW850CSi5.6LV12Upstream Right
1994BMW850CSi5.6LV12Upstream Left
1993BMW325i2.5LL6Upstream
1992BMW318isCoupe1.8LL4UpstreamTo Sep/1992
1992BMW325i2.5LL6Upstream
1991BMW325i2.5LL6Upstream
1991BMW325is2.5LL6Upstream
1991BMW325iX2.5LL6Upstream
1990BMW325i2.5LL6Upstream
1990BMW325is2.5LL6Upstream
1990BMW325iX2.5LL6Upstream
1989BMW325i2.5LL6Upstream
1989BMW325is2.5LL6Upstream
1989BMW325iX2.5LL6Upstream
1988BMW325i2.5LL6UpstreamFrom Sep/1987
1988BMW325is2.5LL6UpstreamFrom Sep/1987
1988BMW325iX2.5LL6UpstreamFrom Sep/1987

* 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:

11781720860117817300051306213064130671321513219132201323113244133571342621313362135492135502135762135812135842135852135892344674234467625529751557752030753215ES10254ES10266OS536OS547SG1139SG1139TSG75SG75T

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