Denso 234-4063 Oxygen Sensor - Downstream or Upstream

Denso OE Style Oxygen Sensor 234-4063

Denso 234-4063 is an OE Style heated oxygen sensor built for direct replacement in specific applications. It is engineered for exact fitment and stable signal performance, with a threaded mounting design and a 4-wire female connector for the listed vehicles.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fit design for direct replacement
• 4-wire configuration with female connector
• Threaded mounting type with 0.708 thread diameter
• 12.40 in. wiring harness length
• OE Style construction for the listed Honda, Isuzu, and Pontiac applications

OE Style Construction

Denso’s OE Style line is built to match original equipment fit and function as closely as possible. This sensor uses precision-built components for first-time fitment and includes Denso’s aluminum oxide trap layer, which helps protect the ceramic element from silicone and lead contamination. That design supports consistent engine management performance, fuel efficiency, and long service life in the applications listed for Honda Passport, Isuzu Axiom, Isuzu Trooper, Isuzu Rodeo, Isuzu Rodeo Sport, and Pontiac GTO.

This part cross-references Bosch (e.g., 15561, 15703) for the same application.

Vehicle Fitment

• Fits 2004-2006 Pontiac GTO, downstream.
• Fits 2002-2003 Isuzu Axiom, upstream.
• Fits 2002-2003 Isuzu Axiom, downstream.
• Fits 2000-2002 Isuzu Trooper, upstream.
• Fits 2000-2002 Isuzu Trooper, downstream.
• Fits 2001 Honda Passport, upstream.
• Fits 2001 Honda Passport, downstream.
• Fits 2001 Isuzu Rodeo, upstream.
• Fits 2001 Isuzu Rodeo, downstream.
• Fits 2001 Isuzu Rodeo Sport, upstream.
• Fits 2001 Isuzu Rodeo Sport, downstream.

Common Uses

• Replacing a failed upstream oxygen sensor on a 2001 Honda Passport
• Replacing a downstream oxygen sensor on a 2004-2006 Pontiac GTO
• Addressing check engine light concerns related to oxygen sensor performance
• Restoring proper air-fuel feedback for engine control systems
• Correcting drivability issues tied to inaccurate exhaust oxygen readings

Installation Notes

Verify the connector style, wire count, thread diameter, and sensor position before installation. This Denso 234-4063 oxygen sensor is a specific-fit replacement, so matching the listed upstream or downstream location is important for proper installation. Inspect the harness routing and connector condition during replacement to help ensure a clean OE-style fit.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for replacement accuracy and consistent performance. The OE Style design focuses on correct fit, dependable signal output, and durability in the listed applications.