DENSO 234-8051 Heated Oxygen Sensor Direct Fit Wire - 4-Wire 12.20

The DENSO 234-8051 is a direct-fit, heated 4-wire oxygen sensor (O2 sensor) featuring a 12.20-inch wire length. Manufactured and tested to OE standards, this sensor is engineered as a precision replacement that installs correctly the first time — no modifications required.

As a global OE supplier, DENSO builds its aftermarket oxygen sensors with the same components and tolerances used on the original factory assembly line. The result is a sensor that restores proper closed-loop fuel management, helping the engine control unit (ECU) maintain an optimal air/fuel ratio for improved fuel efficiency and reduced emissions.

Key Features:

• Aluminum Oxide Trap Layer: Exclusive coating protects the ceramic element and platinum electrode from silicone and lead contamination, extending sensor life
• Double Protection Cover: Maintains proper operating temperature for faster response times and shields the ceramic element from exhaust contamination
• Stainless Steel Housing: Rugged, watertight construction resists corrosion and contamination in harsh underhood environments
• Porous PTFE Filter: Allows atmospheric oxygen into the sensor reference chamber while blocking water and engine contaminants
• 100% Tested: Every sensor is checked for high-temperature signal output, air tightness, continuity, and heat resistance before leaving the factory
• Direct Fit Design: OE-matched connector and thread pitch ensure a first-time fit with no cutting or splicing required
• 4-Wire Heated Design: Integrated heater circuit brings the sensor to operating temperature quickly, enabling faster closed-loop operation — especially important during cold starts

The DENSO 234-8051 meets or exceeds original equipment specifications, making it a reliable choice for restoring proper exhaust monitoring and catalytic converter efficiency. Sold individually.