Denso 234-4159 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor for Tacoma

Denso 234-4159 is a specific-fit heated oxygen sensor built for direct replacement in select Toyota Tacoma applications. It is engineered to match OE-style fit and signal performance for downstream exhaust monitoring on 1998-2000 Tacoma models.

Key Features

• Heated oxygen sensor for faster operating temperature and stable exhaust feedback
• Specific-fit design for direct replacement on listed Toyota Tacoma applications
• 33.07-inch wiring harness length for proper routing
• 4-wire configuration for the correct sensor interface
• OE Style construction from Denso for exact replacement fit
• Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

Product Details

Denso OE Style oxygen sensors are manufactured and tested to OE standards, with precision-built components intended to match the original sensor location and electrical setup. Part number 234-4159 is a downstream oxygen sensor for Toyota Tacoma, including 1998-1999 Tacoma and 2000 Tacoma excluding California applications. This part cross-references Bosch 13164 for the same application.

For drivers searching for a downstream oxygen sensor for 1998-2000 Toyota Tacoma, Denso 234-4159 provides the correct fitment profile and the sensor design needed for accurate exhaust feedback. It is also a practical choice when replacing a worn Toyota Tacoma oxygen sensor that has affected drivability or emissions monitoring.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel feedback from a degraded downstream sensor
• Reduced fuel economy caused by inaccurate exhaust readings
• Emissions test failures tied to sensor response issues
• Rough engine operation associated with aging exhaust sensors

Installation Notes and Tips

Verify the vehicle is a 1998-1999 Tacoma or a 2000 Tacoma excluding California before ordering. Confirm the downstream sensor location, wire count, and harness length against the original part before installation. Use proper oxygen sensor service tools and inspect the exhaust connector and wiring path for heat damage or corrosion during replacement.

Quality Assurance

Denso manufactures this OE Style oxygen sensor to strict original-equipment standards and tests each component for replacement accuracy and first-time fit. The sensor’s protective trap layer is designed to help resist contamination that can shorten sensor life and affect engine performance.