TRQ O2 OXYGEN SENSOR 19BT21D Downstream Front 3.5L V6

( Brand: Trq O2 Oxygen Sensor ), ( Manufacturer Part Number: 19BT21D ), ( Placement On Vehicle: Downstream Front ), ( Part Details: O2 Oxygen Sensor Bank 2 Sensor 2 ), ( Fit Years: 2019 2017 2016 2018 2020 ), ( Cs-sku: 400 )

Review TRQ O2 OXYGEN SENSOR Downstream Front Acura 3.5l V6 fits MDX 2016–2020

Introducing the O2 Sensor 19BT21D Downstream Front, an essential component for maintaining the optimal fuel-air mixture in your 2016-2020 Acura MDX 3.5L V6. This oxygen sensor, manufactured by OEM standards, is designed to monitor the exhaust gases and provide real-time feedback to the engine management system.

The O2 Sensor 19BT21D Downstream Front is strategically located in the exhaust system, downstream from the catalytic converter. Its primary function is to detect the amount of unburnt oxygen in the exhaust stream and signal the engine computer to adjust the fuel injection accordingly. This ensures the most efficient combustion, leading to improved engine performance, enhanced fuel economy, and reduced emissions.

This OEM quality sensor is engineered to provide accurate and reliable readings, ensuring your vehicle operates at its peak efficiency. The sensor's heating element ensures a quick warm-up time, allowing for accurate readings as soon as possible after engine start-up.

Made from high-quality materials, this O2 sensor is built to withstand the extreme temperatures and corrosive exhaust gases found in your vehicle's exhaust system. The sensor's ceramic element is coated with a protective layer to prevent fouling, ensuring long-lasting performance.

Installation of the O2 Sensor 19BT21D Downstream Front is a straightforward process. Simply replace the old sensor with the new one, ensuring a secure connection to the wiring harness and exhaust system. We recommend using a new gasket to ensure a proper seal and prevent exhaust leaks.

In summary, the O2 Sensor 19BT21D Downstream Front is an essential component in maintaining the performance, fuel economy, and emissions of your 2016-2020 Acura MDX 3.5L V6. With its OEM quality, accurate readings, and durable design, this sensor is an investment in the longevity and efficiency of your vehicle.

Buying an O2 sensor (part number 19BT21D, downstream front, for the 2016-2020 Acura MDX with a 3.5L V6 engine) can be a crucial decision for maintaining the optimal performance and fuel efficiency of your vehicle. Here are some pros and cons that may help you make an informed choice:

1. Improved Fuel Efficiency: A faulty O2 sensor can cause your vehicle to burn more fuel than necessary. Replacing it with a new one can help restore proper fuel-air mixture, leading to better fuel economy.

2. Enhanced Emissions Performance: An O2 sensor measures the amount of unburnt oxygen in your vehicle's exhaust gases. A malfunctioning sensor can result in increased emissions, leading to potential environmental concerns and potential fines in some areas. By replacing the sensor, you can help ensure your vehicle meets emissions standards.

3. Improved Engine Performance: A faulty O2 sensor can cause a check engine light to illuminate, and it may affect other engine control systems. Replacing the sensor can help restore proper engine performance and prevent potential damage to other components.

1. Cost: Replacing an O2 sensor is a relatively inexpensive repair, typically costing between $50 to $150 for the sensor itself, plus labor costs if you choose to have it installed at a shop. However, if you're not comfortable with the installation process, the cost can be higher.

2. Time: If you choose to install the sensor yourself, it may take some time to gather the necessary tools and complete the installation process. If you have it installed at a shop, you may need to wait for an appointment.

3. Potential for Multiple Sensors: Your vehicle may have multiple O2 sensors, and one sensor failing does not necessarily mean the others will fail soon. You may need to replace additional sensors in the future.

In conclusion, replacing an O2 sensor (part number 19BT21D, downstream front, for the 2016-2020 Acura MDX with a 3.5L V6 engine) is an essential maintenance task that can help improve fuel efficiency, emissions performance, and engine performance. While there are costs and time involved, the potential benefits to your vehicle's overall health and performance make it a worthwhile investment.

Recommendation: If you suspect that your vehicle's O2 sensor is malfunctioning, we recommend having it inspected by a certified mechanic. They can diagnose the issue and provide you with an accurate estimate for the cost of replacement. If you're comfortable with the installation process, you may choose to purchase the sensor online and install it yourself to save on labor costs.

Details:

Sensor Design: Thimble. Static-pressed and plasma-sprayed for extended service life. Sensor Type: Heated. Restored Engine Performance: Improved fuel economy and lower emissions.

Condition: New Vehicle Fitment Engine, 2016 - 2020 Acura MDX3.5L V6. Position: Downstream Front. Notes: O2 Oxygen Sensor Bank 2.

part #: 19bt21d price

• $38.74

specifications acrasensor:

• for models: Mdx
• for makes: Acura
• for years: 2016-2020
• brand: Trq O2 Oxygen Sensor
• mpn: 19bt21d
• placement on vehicle: Downstream Front
• part details: O2 Oxygen Sensor Bank 2 Sensor 2
• fit years: 2019 2017 2016 2018 2020
• cs-sku: 400

offer acraSensor:

• started: May 7, 2025
• options: Ship-to-home
• sold: 0
• quantity: 5
• availability: In Stock

shipping acraSensor:

• carrier: FedEx
• type: Fixed
• cost: $0.00
• class: Standard
• transit: 2-6 Days
• service: FedEx Ground or FedEx Home Delivery

returns acraSensor:

• paid by: Buyer
• policy: Returns Accepted
• time: 30 Days

payments acraSensor:

• wallet: Apple-pay
• other
• credit card: Discover

general acraSensor:

• Car Truck Parts Accessories > Air Fuel Delivery > Air Intake Fuel Sensors
• condition: New

seller acraSensor:

• # reviews: 59578
• rating: 95.9%
• city: San Jose, California

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