DENSO 234-5161 Air/Fuel Ratio Sensor 5-Wire Direct Fit Heated Wideband

The DENSO 234-5161 is a direct-fit, heated, wide-band air/fuel ratio (AFR) sensor featuring a 5-wire harness measuring 24.61 inches in length. Designed as an OE-identical replacement, this sensor delivers the same precision and reliability as the original factory-installed unit.

Air/fuel ratio sensors, also known as wide-band oxygen sensors or wideband O2 sensors, are engineered to measure air-to-fuel ratios across a wider range of driving conditions than conventional oxygen sensors. This data is continuously transmitted to the engine management computer, allowing it to make real-time adjustments that improve fuel efficiency and reduce harmful emissions.

Key Features:

• Wide-band technology measures air/fuel ratios from approximately 12:1 to 19:1 for precise engine management across the full RPM range
• Double protection cover maintains proper operating temperature for quicker response times and shields the ceramic element against silicone and lead contamination
• Aluminum-oxide trap layer keeps silicone and lead outside the ceramic element, protecting the platinum electrode from damage
• Stainless steel housing resists corrosion and contamination with a rugged, watertight body
• Heated element reaches operating temperature faster for improved cold-start performance and emissions control
• Direct fit design with OE-spec M18 thread, 22mm hex, and male connector for hassle-free installation
• Manufactured and tested to OE standards at QS9000 and ISO9000 certified DENSO facilities
• Sold individually; covered by a 1-year limited warranty

Specifications:

• Wire Count: 5
• Wire Harness Length: 24.61 inches
• Thread Diameter: M18 (0.711 in)
• Hex Size: 22mm (7/8 in)
• Connector Gender: Male
• Sensor Type: Wide-Band
• Fit Type: Direct Fit (Specific)
• Heated: Yes

Cross-Reference Part Numbers: 4H0906262G, 4H0906262P, 17056, 250-25112, 25025112, 350-35100, 35035100, 27055

As one of the world's largest OE sensor suppliers, DENSO brings decades of engineering expertise to every aftermarket component. The 234-5161 is an ideal choice for restoring factory-level emissions performance and fuel efficiency.