HomeEmission Control > SensorsDenso 234-5090 Air / Fuel Ratio Sensor - Downstream or Upstream
Part #: 234-5090

Denso 234-5090 Air / Fuel Ratio Sensor - Downstream or Upstream

OE Style, Downstream
32 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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OE Direct Replacement — Bolt-on fit, no modifications needed
OE Style, Downstream
Fitment: Ram and Dodge, 2500, 3500, Ram 2500, and Ram 3500
Easy Returns — Return within 60 days for a full refund
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Overview of the Denso OE Style Air/Fuel Ratio Sensor

The Denso OE Style Air/Fuel Ratio Sensor 234-5090 is designed specifically for Dodge Ram 2500 and 3500 models. This heated sensor ensures accurate air and fuel mixture readings to help maintain optimal engine performance and emissions control.

  • Heated sensor type for faster response times
  • Specific fit for Dodge Ram 2500 and 3500 models
  • 13.15-inch wiring harness length for precise installation
  • Five-wire configuration with male connector
  • Thread diameter of 0.711 inches for secure mounting
  • Regular grade type for reliable operation

Detailed Product Description

The Denso 234-5090 air/fuel ratio sensor is engineered to meet the exact specifications of Dodge Ram 2500 and 3500 trucks. Featuring a heated sensor element, it provides quicker sensor activation and more accurate readings under various operating conditions. The 13.15-inch wiring harness length allows for proper routing and connection without excess slack. This sensor includes five wires and a male connector, ensuring compatibility with the vehicle’s existing wiring harness. The thread diameter of 0.711 inches guarantees a secure and proper fit during installation. As part of Denso's OE Style product line, this sensor is designed to match original equipment performance and fitment, providing a direct replacement solution.

About the OE Style Product Line

Denso's OE Style line focuses on delivering parts that closely replicate original equipment specifications. The OE Style air/fuel ratio sensors are manufactured to provide consistent performance and fitment, making them suitable replacements for factory-installed components. The 234-5090 sensor maintains the quality and reliability expected from Denso while offering a direct fit for Dodge Ram 2500 and 3500 models.

Common Applications and Issues Addressed

  • Helps correct air/fuel mixture imbalances
  • Resolves rough idling and engine hesitation
  • Reduces emissions by providing accurate sensor data
  • Prevents check engine light triggers related to sensor faults
  • Improves fuel efficiency by optimizing combustion

Installation Notes and Tips

When installing the Denso 234-5090 air/fuel ratio sensor, ensure the vehicle is cooled down to avoid burns. Use the 0.711-inch thread diameter to properly secure the sensor in place without over-tightening. Verify the five-wire harness and male connector align with the vehicle’s wiring harness for a seamless connection. Proper routing of the 13.15-inch wiring harness is essential to avoid damage or interference with other engine components.

Quality Assurance and Warranty

Denso manufactures the 234-5090 sensor to meet strict quality standards, ensuring reliable operation and durability. This part is backed by Denso’s quality assurance processes, providing confidence in its performance as a replacement sensor for Dodge Ram 2500 and 3500 trucks. Please refer to Denso’s warranty policy for specific coverage details.

BrandDenso
Part Number234-5090
PositionOE Style, Downstream
Connector GenderMale
Grade TypeRegular
Sensor TypeHeated
Thread Diameter0.711
Universal Or Specific FitSpecific
Wire Quantity5
Wiring Harness Length13.15

This part fits 32 vehicles. Search below:

YearMakeModelBody TypePositionNotes
2012Ram2500UpstreamOE Style
2012Ram2500DownstreamOE Style
2012Ram3500Standard Cab PickupUpstreamOE Style
2012Ram3500Standard Cab PickupDownstreamOE Style
2012Ram3500Extended Crew Cab PickupUpstreamOE Style
2012Ram3500Extended Crew Cab PickupDownstreamOE Style
2012Ram3500Crew Cab PickupUpstreamOE Style
2012Ram3500Crew Cab PickupDownstreamOE Style
2011Ram2500UpstreamOE Style
2011Ram2500DownstreamOE Style
2011Ram3500Standard Cab PickupUpstreamOE Style
2011Ram3500Standard Cab PickupDownstreamOE Style
2011Ram3500Extended Crew Cab PickupUpstreamOE Style
2011Ram3500Extended Crew Cab PickupDownstreamOE Style
2011Ram3500Crew Cab PickupUpstreamOE Style
2011Ram3500Crew Cab PickupDownstreamOE Style
2010DodgeRam 2500UpstreamOE Style
2010DodgeRam 2500DownstreamOE Style
2010DodgeRam 3500UpstreamOE Style
2010DodgeRam 3500DownstreamOE Style
2009DodgeRam 2500UpstreamOE Style
2009DodgeRam 2500DownstreamOE Style
2009DodgeRam 3500UpstreamOE Style
2009DodgeRam 3500DownstreamOE Style
2008DodgeRam 2500UpstreamOE Style
2008DodgeRam 2500DownstreamOE Style
2008DodgeRam 3500UpstreamOE Style
2008DodgeRam 3500DownstreamOE Style
2007DodgeRam 2500UpstreamOE Style
2007DodgeRam 2500DownstreamOE Style
2007DodgeRam 3500UpstreamOE Style
2007DodgeRam 3500DownstreamOE 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:

17212

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