Denso 234-5158 Air / Fuel Ratio Sensor - Upstream, Upstream Left or Upstream Right

Overview of the Denso OE Style Air/Fuel Ratio Sensor

The Denso OE Style Air/Fuel Ratio Sensor 234-5158 is engineered for precise emission control in select Infiniti and Mercedes-Benz vehicles. Designed as a heated sensor with a specific fit, it ensures accurate air-fuel mixture readings for optimal engine performance.

• Heated air/fuel ratio sensor for reliable operation
• Specific fit for Infiniti and Mercedes-Benz models
• 21.46-inch wiring harness length for proper installation
• Five-wire configuration with male connector
• Thread diameter of 0.711 inches for secure mounting
• Regular grade type for standard OEM replacement

Detailed Product Description

This Denso air/fuel ratio sensor, part number 234-5158, belongs to the OE Style product line, which focuses on delivering components that meet original equipment specifications. The heated sensor type allows for quicker warm-up times, improving emission control and fuel efficiency. With a wiring harness length of 21.46 inches and a five-wire setup, this sensor is designed for a precise fit and reliable electrical connection. The male connector and 0.711-inch thread diameter ensure compatibility with the designated Infiniti and Mercedes-Benz models, including AMG GT 63, C43 AMG, CLS63 AMG, GLE63 AMG, and others.

Compatible Vehicles and Applications

This air/fuel ratio sensor is compatible with a range of Infiniti and Mercedes-Benz vehicles, specifically models such as the AMG GT 63, C300, CLS550, G63 AMG, GLS450, Maybach S560, ML350, QX30, S550, and SLK350. It is designed to replace the original sensor in these vehicles to maintain proper emission control and engine management.

• Helps resolve issues with poor fuel economy
• Addresses rough idling and engine hesitation
• Corrects check engine light triggers related to air/fuel mixture
• Improves emissions system performance
• Prevents failed emissions tests due to sensor faults

Installation Notes and Tips

When installing the Denso 234-5158 air/fuel ratio sensor, ensure the vehicle is cooled down to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. Verify the connector type matches the vehicle’s harness before installation. Proper torque should be applied to the 0.711-inch threaded sensor to prevent leaks or sensor damage. It is recommended to clear any diagnostic trouble codes after installation.

Quality Assurance and Warranty

The Denso OE Style air/fuel ratio sensor 234-5158 is manufactured to meet OEM standards, ensuring reliable performance and durability. While specific warranty details may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship. This sensor is a regular grade replacement part designed to maintain factory-level emission control system function.