Denso 234-4001 Oxygen Sensor - Downstream or Upstream

Denso OE Style Oxygen Sensor 234-4001

Denso 234-4001 is an OE Style heated oxygen sensor built for specific-fit replacement in select Ford, Mazda, Jaguar, and Mercury applications. It is engineered for accurate exhaust feedback, stable connector fitment, and dependable operation in upstream and downstream locations where listed.

Key Features

• Heated oxygen sensor with a specific-fit design for direct replacement
• OE Style construction for factory-style fit and function
• 4-wire configuration with male connector
• Threaded mounting with 0.708 in. thread diameter
• 14.84 in. wiring harness length for listed applications
• Built to Denso OE standards with precision-built components
• Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

Product Details

Denso 234-4001 is designed for vehicles that require a heated oxygen sensor with exact-fit dimensions and OE-style electrical connection. This part number is used in applications such as 1994-1995 Ford Mustang upstream, 1995 Ford F-150 upstream, 1995 Ford F-350 upstream, and 2001-2002 Jaguar S-Type downstream. It also cross-references Bosch 15716 and NTK 22016 for the same application. The Denso OE Style line focuses on direct replacement fitment and consistent sensor response for emissions system service.

Compatible vehicle coverage includes Ford Bronco, E-150 Econoline, E-250 Econoline, E-350 Econoline, F-150, F-250, F-350, Mustang, Thunderbird, Mercury Cougar, Mazda B2300, and Jaguar S-Type. If you are replacing a worn upstream or downstream oxygen sensor on a 1995 Ford truck or a 2001-2002 Jaguar S-Type, this part number is built to match the listed application.

Common Problems This Part Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel feedback from a failing heated O2 sensor
• Poor fuel economy caused by inaccurate exhaust readings
• Rough idle or drivability issues tied to sensor degradation
• Emissions test failure from a worn or contaminated sensor

Installation Notes

• Verify the vehicle year, make, model, and sensor position before ordering.
• Match the threaded mounting style, 4-wire layout, and connector gender to the original sensor.
• Confirm upstream or downstream placement exactly as listed for your application.
• Inspect the harness routing and connector condition during replacement.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for precise replacement fitment and consistent performance. The OE Style design and contamination-resistant trap layer support long-term sensor durability in the listed applications.