HomeEmission Control > SensorsDenso 234-9088 Air / Fuel Ratio Sensor - Upstream
Part #: 234-9088

Denso 234-9088 Air / Fuel Ratio Sensor - Upstream

OE Style, Upstream
3 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
OE Style, Upstream
Fitment: Mazda, MX-5 Miata
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of the Denso OE Style Air/Fuel Ratio Sensor

The Denso OE Style Air/Fuel Ratio Sensor 234-9088 is designed specifically for Mazda MX-5 Miata models. This heated sensor ensures accurate air and fuel mixture readings, contributing to optimal engine performance and emissions control.

  • Heated sensor type for faster response times
  • Specific fit for Mazda MX-5 Miata
  • 8.90-inch wiring harness length for precise installation
  • 4-wire configuration with male connector
  • Thread diameter of 0.711 inches for secure mounting
  • Regular grade type for reliable operation

Details on the OE Style Product Line

The Denso OE Style line focuses on providing replacement parts that match original equipment specifications. The 234-9088 air/fuel ratio sensor maintains the quality and fitment standards expected from factory components, ensuring compatibility and performance for Mazda MX-5 Miata vehicles.

Technical Description and Features

This air/fuel ratio sensor features a heated element to reduce warm-up time, allowing the engine control unit to receive accurate data quickly. The 8.90-inch wiring harness length and 4-wire design with a male connector facilitate straightforward integration with the vehicle’s existing wiring. The sensor’s thread diameter of 0.711 inches ensures a proper seal and fit in the exhaust system. Designed as a specific fit part, it is engineered to meet the exact requirements of the Mazda MX-5 Miata, avoiding compatibility issues common with universal sensors.

Common Applications and Problem Resolution

  • Helps correct inaccurate air/fuel mixture readings
  • Addresses engine performance issues related to faulty sensors
  • Reduces emissions by providing precise data to the ECU
  • Prevents check engine light triggers related to sensor faults
  • Improves fuel efficiency by maintaining proper combustion ratios

Installation Notes and Tips

When installing the Denso 234-9088 air/fuel ratio sensor, ensure the wiring harness is routed away from high-heat areas to prevent damage. Use the correct thread size of 0.711 inches to avoid leaks and ensure a secure fit. Verify the male connector aligns properly with the vehicle’s wiring harness to maintain electrical integrity. It is recommended to follow Mazda MX-5 Miata service guidelines for sensor replacement procedures.

Quality Assurance and Warranty

Denso’s OE Style air/fuel ratio sensor is manufactured to meet original equipment standards, providing consistent performance and durability. While specific warranty details are not provided here, Denso parts typically come with a limited warranty covering defects in materials and workmanship. Refer to the product documentation or supplier for exact warranty terms.

BrandDenso
Part Number234-9088
PositionOE Style, Upstream
Connector GenderMale
Grade TypeRegular
Sensor TypeHeated
Thread Diameter0.711
Universal Or Specific FitSpecific
Wire Quantity4
Wiring Harness Length8.90

This part fits 3 vehicles. Search below:

YearMakeModelPositionNotes
2008MazdaMX-5 MiataUpstreamOE Style
2007MazdaMX-5 MiataUpstreamOE Style
2006MazdaMX-5 MiataUpstreamOE Style

* 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:

15784

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