Denso 234-4157 Oxygen Sensor - Upstream

OE-Style Oxygen Sensor for Lexus and Toyota

Denso 234-4157 is an OE-style heated oxygen sensor built for direct replacement on select Lexus LX450 and Toyota Land Cruiser applications. It is engineered for specific fitment, accurate exhaust feedback, and dependable operation in upstream sensor locations.

Key Features

• Heated oxygen sensor with 4-wire design for stable signal performance
• Specific-fit replacement for direct installation on listed applications
• 10.24-inch wiring harness length for proper routing
• OE-style construction for factory-like fit and function
• Denso aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

Product Details

Denso 234-4157 is manufactured and tested to OE standards for vehicles that require precise exhaust monitoring. This upstream oxygen sensor is designed for 1995 Toyota Land Cruiser, 1996-1997 Toyota Land Cruiser, and 1996-1997 Lexus LX450 applications, making it a direct-fit choice for owners replacing a worn sensor on these platforms. The OE Style line focuses on exact replacement dimensions and first-time fit, while the protective trap layer supports long-term sensor durability and consistent engine management performance.

This part cross-references Toyota 8946569085 for the same application.

Common Symptoms It Can Address

• Check engine light related to oxygen sensor performance
• Rough idle or inconsistent air-fuel control
• Reduced fuel economy from inaccurate exhaust readings
• Slow sensor response during closed-loop operation
• Failed emissions testing tied to upstream sensor faults

Installation Notes

Verify the upstream sensor location before ordering and match the connector and wire count to the original part. The 10.24-inch harness length supports proper routing on the listed Toyota and Lexus applications. Confirm the vehicle year and model exactly, including the 1995 Land Cruiser build note from 01/95.

Quality Assurance

Denso manufactures this oxygen sensor to strict OE standards and tests each component for replacement accuracy and fit consistency. The OE Style design is intended to deliver the correct part and fit for the listed Lexus LX450 and Toyota Land Cruiser applications.