Denso 234-9088 Air / Fuel Ratio Sensor - Upstream
OE Quality 60-Day Returns
Denso
 OE Style

Denso 234-9088 Air / Fuel Ratio Sensor - Upstream

Brand Denso 234-9088
Position Upstream
Connector Gender Male
Grade Type Regular
Sensor Type Heated
Thread Diameter 0.711
Universal Or Specific Fit Specific
Wire Quantity 4
Wiring Harness Length 8.90
Product line OE Style
Fits Mazda · 3 vehicles

OE style replacement. Precision-built for exact replacement and a first-time fit.

Heated sensor. Helps deliver faster, more consistent air-fuel ratio readings.

Specific fit. Made to match the part application without modifications.

Cross-references Bosch 15784, Mazda LFG1188G1A and NTK 24829 for the same application. See all 5.

$215.04Free shipping
In stock · usually ships same day before 1pm CST
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Order total $215.04
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Air / Fuel Ratio Sensor options

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-9088 is an OE Style heated air/fuel ratio sensor built for exact replacement and first-time fit. It is specified for the upstream position on select 2006-2008 Mazda MX-5 Miata models, including 2006 Mazda MX-5 Miata upstream applications.

Key Features

  • Heated air/fuel ratio sensor for upstream exhaust monitoring
  • Specific fit design for direct replacement on the listed application
  • 4-wire configuration with male connector
  • 8.90 in. wiring harness length for OE-style routing
  • Thread diameter: 0.711
  • Built and tested to OE standards for consistent sensor performance

Product Details

The Denso OE Style line focuses on direct-fit replacement parts that match factory specifications for proper installation and dependable signal output. Part number 234-9088 is engineered for the 2006-2008 Mazda MX-5 Miata upstream location, where accurate air/fuel feedback is critical for engine management. This sensor cross-references Bosch 15784 for the same application.

For buyers searching for a Mazda MX-5 Miata upstream air/fuel ratio sensor, Denso 234-9088 provides a specific-fit solution that follows OE-style dimensions and connector layout. It is also referenced by Mazda LFG1188G1A, NTK 24829, and Walker Products 250-54063 / 350-64075.

Common Issues This Sensor May Address

  • Check engine light related to air/fuel sensor performance
  • Incorrect upstream oxygen sensor or air/fuel ratio sensor readings
  • Rough idle or drivability concerns tied to fuel mixture control
  • Failed emissions inspection caused by sensor faults
  • Slow sensor response affecting engine management feedback

Installation Notes

Confirm the upstream position and connector match before installation. Verify thread diameter, harness length, and wire count against the original sensor on the vehicle. For 2006-2008 Mazda MX-5 Miata applications, use the OE routing path and inspect the connector and exhaust bung condition before tightening the sensor.

Quality Assurance

Denso manufactures and tests this OE Style sensor to strict original-equipment standards for fit and performance consistency. The precision-built design supports direct replacement on the listed Mazda MX-5 Miata applications.

Related reading

This part fits 3 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2008MazdaMX-5 MiataUpstreamOE Style
2007MazdaMX-5 MiataUpstreamOE Style
2006MazdaMX-5 MiataUpstreamOE Style
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Bosch — 15784Mazda — LFG1188G1ANTK — 24829Walker Products — 250-54063Walker Products — 350-64075