Denso 234-4506 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor for Lexus SC430

Denso 234-4506 is an OE-style heated oxygen sensor built for exact replacement on the downstream position of the 2006-2010 Lexus SC430. It is engineered for a specific fit, with a 4-wire female connector and threaded mounting for direct service replacement.

Key Features

• OE Style replacement for precise fit and function
• Heated oxygen sensor design for downstream exhaust monitoring
• Specific fit for 2006-2010 Lexus SC430, downstream
• 4-wire configuration with female connector
• Threaded mounting with 0.708 in. thread diameter
• 28.35 in. wiring harness length for application-specific routing
• Denso aluminum oxide trap layer helps protect the sensing element from silicone and lead contamination

Detailed Description

The Denso 234-4506 oxygen sensor is manufactured and tested to OE standards for a direct replacement on the Lexus SC430. As part of Denso’s OE Style line, this sensor is built for first-time fit and consistent installation on the downstream exhaust location. It is designed to support accurate exhaust feedback, helping maintain proper engine performance and fuel efficiency when the original sensor has aged or failed.

This part cross-references Toyota 8946524220 for the same application. It also aligns with other aftermarket references such as Bosch 15127 and NTK 24841. Use Denso 234-4506 when you need a downstream oxygen sensor for 2006-2010 Lexus SC430 service work.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Slow or inaccurate exhaust oxygen readings
• Reduced fuel economy caused by a worn sensor
• Rougher engine operation from incorrect air-fuel feedback
• Service replacement for a damaged or contaminated OE sensor

Installation Notes and Tips

Fits 2006-2010 Lexus SC430, downstream. Confirm connector style, wire count, and threaded mounting before installation. The 28.35-inch harness length and specific-fit design support direct replacement, but the sensor should be installed on the correct exhaust location for proper operation. Inspect the exhaust threads and connector condition during service to avoid fitment or electrical issues.

Quality Assurance

Denso manufactures this oxygen sensor to strict OE standards and tests each component for replacement accuracy and fit. The OE Style product line focuses on direct-fit service parts built to match original equipment requirements, with contamination protection built into the sensing element design for long-term durability.