TRQ O2 Oxygen Sensor 4 Wire Narrow-Band Downstream Rear - Direct Fit

In this review of the TRQ O2 Oxygen Sensor the bottom line is clear: it is aimed at DIY owners and independent shops needing a direct-replacement downstream narrow-band sensor for select Lexus and Toyota V6 and some Highlander L4 models. The single biggest reason to buy is the pre-assembled, direct-fit design that saves time during replacement and avoids modifications. The reviewer found it especially useful when a simple, plug-and-play downstream sensor swap was needed to clear check-engine codes or restore fuel trim control.

Key Features

• Direct fit design: Pre-assembled components allow for an easier swap into compatible Lexus RX350, RX450h and many Toyota Highlander models without cutting or splicing.
• Four-wire narrow-band: The 4-wire configuration supports heated sensor operation to reach operating temperature faster and improve emissions control.
• Comprehensive reference numbers: Multiple reference numbers are supplied so shoppers can cross-check compatibility with their vehicle before purchasing.
• Plug-ready wiring harness: A 22.99 in wiring harness and overall 28.74 in length provide sufficient reach for typical downstream rear mounting positions on the listed vehicles.
• Manufacturer support: TRQ emphasizes DIY video resources and fitment guidance to help users verify compatibility and installation steps.

Who It's For

The TRQ oxygen sensor is for owners of 2010-2015 Lexus RX350 and RX450h models and various 2006-2016 Toyota Highlander configurations who want a cost-effective replacement that installs with minimal fuss. It suits DIY mechanics and independent shops looking for a direct replacement with a heated narrow-band element.

It is not recommended for buyers who need a universal sensor or a wide-band performance sensor, or for anyone who cannot confirm exact vehicle fitment using the provided reference numbers and compatibility chart. Those concerned about long-term longevity on high-mileage vehicles should weigh reported variability in durability.

Pros & Cons

Pros

• Good value for money compared with dealer parts and easy for competent DIYers to install.
• Direct-fit, pre-assembled harness reduces install time and avoids modifications.
• Heated 4-wire design brings the sensor to operating temperature quickly for reliable readings when functioning correctly.

Cons

• Some customers report mixed functionality and occasional defective units, so results can vary.
• Wire length and long-term durability received mixed feedback, so verify fitment and inspect on arrival.

Specifications

Our Verdict

The TRQ O2 Oxygen Sensor is a pragmatic, lower-cost direct-replacement option for owners of compatible Lexus and Toyota models who want a straightforward install and improved emissions control when the original downstream sensor fails. It offers clear value for DIYers, but potential buyers should confirm fitment with the provided reference numbers and be aware that a minority of units have shown functionality or durability issues.

Frequently Asked Questions

Will this sensor fit my Lexus RX350 2012?
It is compatible with 2010-2015 Lexus RX350 V6 3.5L downstream rear; confirm fitment using the reference numbers and your vehicle details.

Is this a heated sensor?
Yes, it is a 4-wire heated narrow-band oxygen sensor designed to reach operating temperature more quickly.

Do I need any modifications to install?
No, the sensor is pre-assembled as a direct fit for the listed models and typically requires no cutting or splicing.