NTK 24840 Oxygen Sensor - Downstream Left or Downstream Right

Direct-Fit Oxygen Sensor for Lexus Applications

NTK oxygen sensor 24840 is a specific-fit, heated sensor built for downstream applications. It uses a threaded mounting design and a 4-wire configuration to match the original equipment style used across select Lexus models.

Key Features

• Direct Fit Oxygen Sensor line for application-specific replacement
• Heated sensor design for faster operating response
• 4-wire construction for OE-style signal and heater circuit layout
• Threaded mounting type with 18 mm thread diameter
• 21.75-inch wiring harness length for proper routing

Detailed Description

NTK part number 24840 is engineered as a direct-fit oxygen sensor for downstream positions on select Lexus IS250, IS350, IS F, GS350, GS450h, GS430, and GS300 applications. Fitment includes 2005-2015 Lexus models with downstream left and downstream right placements, depending on the vehicle and engine configuration. This oxygen sensor is built to OE specifications for fit, form, and function, making it a practical replacement when the original sensor has aged or failed.

NTK, part number 24840, is backed by the brand’s OE-supplier background and manufacturing focus on ceramic sensor technology. The sensor is extensively tested during production to support reliable operation and consistent performance in emission control service.

What This Part Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel feedback from a worn downstream sensor
• Emission control faults tied to sensor response or signal quality
• Replacement needs after sensor contamination or age-related failure
• Fitment issues caused by using a non-specific sensor design

Installation Notes and Tips

Confirm the vehicle’s downstream left or downstream right location before ordering. Match the threaded mounting style, 4-wire layout, and harness length to the original sensor. Use the vehicle’s service information to verify connector routing and placement for Lexus IS250, IS350, IS F, GS350, GS450h, GS430, and GS300 applications.

Quality Assurance

NTK states that its oxygen sensors are extensively tested during manufacturing and built to meet or exceed OE specifications. This part cross-references DENSO Auto Parts (e.g., 234-4521, 234-4922) for the same application.