Denso 234-3085 Oxygen Sensor - Upstream

Reliable Oxygen Sensor for Kia and Mazda Vehicles

The Denso OE Style Oxygen Sensor 234-3085 is designed specifically for select Kia and Mazda models, including the 626, MX-3, Protege, and Sephia. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

• Heated sensor type for faster response times
• Specific fit for Kia 626, Mazda MX-3, Protege, and Sephia
• Threaded mounting type with 0.708-inch thread diameter
• 15.35-inch wiring harness length with 3 wires
• Female connector for secure electrical connection

About the Denso OE Style Product Line

The Denso OE Style line offers oxygen sensors engineered to meet original equipment specifications. This ensures compatibility and reliable performance for vehicles requiring precise emissions control components. The 234-3085 sensor maintains factory standards for fit, form, and function, making it a suitable replacement part for the specified Kia and Mazda models.

Product Details and Specifications

This oxygen sensor features a heated element to reduce warm-up time, improving fuel efficiency and emissions accuracy shortly after engine start. The 15.35-inch wiring harness length provides adequate reach for installation in the exhaust system, while the female connector and 3-wire configuration ensure proper electrical integration. The threaded mounting type with a 0.708-inch diameter allows for secure and straightforward installation in the exhaust manifold or pipe.

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 ensuring 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 234-3085 oxygen sensor, ensure the engine is cool to avoid burns. Use appropriate tools to avoid damaging the sensor or wiring harness. Verify the female connector matches the vehicle’s harness for a secure fit. Thread the sensor carefully to prevent cross-threading and tighten to manufacturer torque specifications.

Quality Assurance and Warranty

Denso OE Style oxygen sensors are manufactured to meet strict quality standards, ensuring durability and reliable operation. This part number 234-3085 undergoes rigorous testing to comply with emissions regulations and OEM requirements. Warranty coverage details should be confirmed with the parts provider or vehicle manufacturer.