DENSO 234-5154 Air/Fuel Ratio Sensor Direct Fit Heated Wideband Sensor - 5-Wire O2

The DENSO 234-5154 is a direct-fit, heated wideband air/fuel ratio (AFR) sensor designed as an exact OE replacement. Featuring a 5-wire heated design and a generous 29.84-inch wire length, this sensor delivers precise oxygen content readings to the engine control module (ECM), enabling optimal fuel trim, improved combustion efficiency, and reduced emissions.

DENSO is the original equipment supplier for many of the vehicles this sensor fits, meaning this part is built to the same exacting standards as the sensor that came on your vehicle from the factory. Unlike narrowband oxygen sensors, this wideband A/F sensor provides a continuous, linear output signal across a broad air/fuel ratio range — giving the ECM far more granular data for real-time fueling adjustments.

Key Features:

• 5-Wire heated design — dedicated heater circuit brings the sensor to operating temperature quickly, ensuring accurate readings even during cold starts
• Direct fit replacement — uses OE-matching connector and mounting thread pitch for a plug-and-play installation with no modifications required
• 29.84-inch (758 mm) wire length — matches factory harness routing for a clean, factory-quality installation
• Wideband (air/fuel ratio) output — provides linear signal across full AFR range, not just a rich/lean toggle like a standard narrowband O2 sensor
• OE-grade materials — zirconia sensing element and stainless steel housing built to resist high exhaust temperatures and contamination
• Manufactured by DENSO — a Tier 1 OEM supplier to Toyota, Honda, and other major automakers

The DENSO 234-5154 is the smart choice for technicians and DIYers who demand OE-level performance and a first-time fit. Proper air/fuel ratio sensing is critical to fuel economy, catalytic converter longevity, and emissions compliance — don't compromise with an inferior aftermarket substitute.