Denso 234-4123 Oxygen Sensor - Upstream

Overview of the Denso OE Style Oxygen Sensor 234-4123

The Denso OE Style Oxygen Sensor 234-4123 is designed specifically for Honda Civic models, providing precise emission control and optimal engine performance. This heated oxygen sensor features a threaded mounting type and a 12.99-inch wiring harness, ensuring a secure and accurate fit.

• Heated oxygen sensor for faster response times
• Specific fit for Honda Civic vehicles
• Threaded mounting with 0.708-inch thread diameter
• 12.99-inch wiring harness length for proper installation
• Four-wire configuration with male connector

Detailed Product Description

The Denso OE Style line focuses on delivering original equipment quality and fitment, making the 234-4123 oxygen sensor a reliable replacement part for Honda Civic emission systems. This sensor uses a heated element to quickly reach operating temperature, improving fuel efficiency and reducing emissions. The four-wire design includes a male connector, ensuring compatibility with the vehicle’s wiring harness. The threaded mounting type with a 0.708-inch diameter allows for secure installation in the exhaust system. With a wiring harness length of 12.99 inches, this sensor provides sufficient reach for proper connection without excess slack.

Common Applications and Issues Addressed

• Restores accurate oxygen level readings for engine control units
• Helps resolve rough idling and poor fuel economy
• Reduces emissions by maintaining proper air-fuel mixture
• Prevents check engine light triggers related to oxygen sensor faults
• Improves overall engine performance and drivability

Installation Notes and Tips

When installing the Denso 234-4123 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the threaded mounting hole. Verify the wiring harness length and connector gender match the vehicle’s specifications. Tighten the sensor to the manufacturer’s torque specifications to prevent exhaust leaks. It is recommended to inspect the wiring and connectors for damage before installation.

Quality Assurance and Warranty

Denso’s OE Style product line is engineered to meet or exceed original equipment standards, providing reliable performance and durability. While specific warranty details for part number 234-4123 may vary, Denso typically offers coverage against defects in materials and workmanship. This oxygen sensor is manufactured to strict quality controls to ensure consistent operation within Honda Civic emission systems.