Denso 234-4800 Oxygen Sensor - Upstream

Denso OE Style Oxygen Sensor 234-4800

The Denso 234-4800 oxygen sensor is an OE-style, specific-fit replacement built for precise installation and accurate exhaust monitoring. It is a heated, 4-wire sensor with a threaded mounting design and a 14.76-inch wiring harness for the listed applications.

Compatible with 2003-2004 Pontiac Vibe upstream, 2003-2004 Toyota Corolla upstream, and 2003-2004 Toyota Matrix upstream, this Denso oxygen sensor supports proper air-fuel control in common import compact applications. The 234-4800 is engineered for a first-time fit and consistent signal performance.

Key Features

• OE Style replacement from Denso
• Part number 234-4800
• Heated oxygen sensor design
• Specific fit for listed upstream applications
• 4-wire configuration with male connector
• Threaded mounting type with 0.708-inch thread diameter
• 14.76-inch wiring harness length

OE Style Construction

Denso’s OE Style line is built to match original equipment fit and function for direct replacement service. The sensor uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable operation and long service life in demanding exhaust environments. If you are replacing a worn upstream sensor on a Toyota Corolla, Toyota Matrix, or Pontiac Vibe, the 234-4800 is built for the correct fit and electrical connection.

This part cross-references Bosch 13544 and NTK 24811 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings
• Poor fuel economy caused by a failing upstream sensor
• Slow or unstable sensor response
• Emissions test failures tied to exhaust monitoring faults

Installation Notes

Verify the upstream location, connector style, wire count, and thread size before installation. The 234-4800 is a specific-fit sensor for the listed vehicles, so matching the application details is important for proper installation. Inspect the harness routing and connector condition during replacement to ensure a secure electrical connection.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for fit, function, and durability. The 234-4800 is precision built as a direct replacement for the listed applications, with design features intended to maintain accurate exhaust feedback in normal service.