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  3. TOPOWER TO99190AS774P

TOPOWER TO99190AS774P Downstream Oxygen Sensor O2 3.5L

fits model: Mdx, Rl. make: Acura. year: 2003–2006.

To99190as774p Topower 2pcs Downstream 02 O2 Oxygen Sensor For 2003-2006 Acura Mdx Rl 3.5l

( Brand: Topower ), ( Manufacturer Part Number: TO99190AS774P ), ( Type: Sensor ), ( Manufacturer Warranty: 1 Year ), ( Custom Bundle: Yes ), ( Modified Item: No ), ( Fitment Type: Direct Replacement ), ( Thread Size: M18 ), ( Terminal Type: Blade ), ( Universal Or Specific Fit: Specific ), ( Attachment Method: Screw-on ), ( Output Signal Range: 0.2v To 0.8v ), ( Mounting Type: Threaded ), ( Position: Downstream, Sensor 1, Sensor 2 ), ( Features: Direct Fit )

Review TOPOWER 2pcs Downstream 02 O2 Oxygen Sensor Acura 3.5l fits MDX RL 2003–2006

The TOWER Power TP99190AS774P Downstream O2 Sensor is a crucial component of the oxygen sensing system in select 2003-2006 Acura MDX and RL models with a 3.5L engine. This sensor is designed to monitor the exhaust gases leaving the vehicle's engine, allowing the engine management system to maintain optimal fuel-air mixture for efficient operation and reduced emissions.

This particular O2 sensor features a downstream location, meaning it is situated closer to the exhaust manifold or catalytic converter compared to the upstream sensor. This positioning allows it to measure the amount of oxygen present in the exhaust gases after the catalytic converter has had a chance to reduce harmful pollutants.

The TOWER Power TP99190AS774P O2 sensor is a heated, wideband type, which ensures faster response times and improved accuracy compared to traditional narrow-band sensors. This wideband sensor can measure oxygen concentrations across a broader range, providing the engine management system with more precise data for adjusting fuel injection and air intake.

The sensor's design includes a ceramic sensing element, which is coated with a zirconia material that can react with oxygen molecules in the exhaust gas. This reaction generates a voltage that is proportional to the oxygen concentration, which is then transmitted to the vehicle's engine control unit.

The TOWER Power TP99190AS774P Downstream O2 Sensor is a direct replacement for the original equipment sensor and comes with all necessary hardware for installation, including mounting brackets and bolts. It is designed to meet or exceed OEM specifications for durability and performance, ensuring reliable operation for thousands of miles.

This O2 sensor is also compatible with various diagnostic tools and systems, allowing for easy monitoring and troubleshooting of the oxygen sensing system. Its robust design and precise accuracy make it an excellent choice for maintaining the performance and emissions compliance of your 2003-2006 Acura MDX or RL with a 3.5L engine.

Buying a new OEM (Original Equipment Manufacturer) downstream oxygen sensor, part number TO2O2-99190-AS774P, for a 2003-2006 Acura MDX or RL with a 3.5L engine, comes with several pros and cons to consider before making a purchase.

Pros:

1. Improved Fuel Efficiency: A new oxygen sensor ensures accurate air-fuel mixture within the engine. This can lead to improved fuel efficiency, as the engine runs more efficiently with the correct air-fuel ratio.

2. Better Emission Control: An oxygen sensor helps regulate the emission control system in your vehicle. A new sensor ensures that the system functions at its best, reducing harmful emissions and improving overall air quality.

3. Longer Lifespan: A new oxygen sensor is less likely to fail compared to a used or worn-out sensor. Replacing the sensor proactively can save you from potential future repair costs and inconvenience.

4. Maintaining Warranty: If your vehicle is still under warranty, replacing a faulty oxygen sensor with a new one can help maintain the warranty coverage.

Cons:

1. Cost: New oxygen sensors, especially OEM parts, can be quite expensive. However, the long-term benefits and potential savings in fuel efficiency and reduced repair costs can offset the initial investment.

2. Installation: Installing the new sensor yourself may require some mechanical knowledge and tools. If you're not confident in your abilities, it might be worth considering having a professional mechanic do the installation for you.

3. Potential for False Positives: While rare, new oxygen sensors can sometimes give false readings, indicating a problem where none exists. If you notice any unusual symptoms after installing the new sensor, it might be worth having it checked by a professional.

Conclusion:

Although purchasing a new downstream oxygen sensor for your 2003-2006 Acura MDX or RL with a 3.5L engine comes with some costs and considerations, the benefits of improved fuel efficiency, better emission control, longer lifespan, and maintaining warranty coverage often outweigh the cons. Ultimately, the decision to replace the sensor depends on your preference for proactive vehicle maintenance and your budget.

Recommendation:

If you're experiencing symptoms related to a faulty oxygen sensor, such as poor fuel economy, stalling, or check engine light, it's recommended to replace the sensor as soon as possible. Considering the long-term benefits, investing in a new OEM oxygen sensor can help ensure your vehicle runs efficiently and effectively. If you're unsure about the installation process, consult a professional mechanic for assistance.

Details:

If the sensor is good, further diagnosis required. Must Know Before Buying. Note: some replacement sensors have a universal electrical connector that must be configured to the wiring of old sensor. If the car has diagnostic trouble codes, they will need to be cleared.

Step 5 - Use a small wire brush to help clean the threaded port ensure proper seal of new sensor. Oxygen Sensors Location. Your catalytic converter fails unexpectedly Exhaust emissions reach undesirable levels. New List Item.

ONLY a defective sensor after tested by voltmeter is applied to manufacturer warranty. There're many different codes for specific functional failures, which are NOT necessarily relevant to the sensor. If Check Engine Light is on or an OBDII Trouble/Fault code occurs after installation, check the sensor with a voltmeter as below. Step 3 - Then, locate and disconnect the wiring connector, this step should be done before removing sensor if is still attached.

Gently install the new oxygen sensor by hand while keeping wiring and connector free from bends. The following information is for instructional and guidance reference only. Step 1 - Some sensors are equipped with a heat shield that must be removed before the sensor removal, this is performed by removing any mounting bolts. Step 2 - By using a regular socket it minimizes potential damage to the sensor body and threads, this technique helps avoid stripping old upon removal.

Check engine light on A reduction in fuel economy. How to install the oxygen sensor.

part #: to99190as774p price

  • $23.59

specifications acrasensor:

  • for models: Mdx, Rl
  • for makes: Acura
  • for years: 2003-2006
  • brand: Topower
  • mpn: To99190as774p
  • type: Sensor
  • manufacturer warranty: 1 Year
  • custom bundle: Yes
  • modified item: No
  • fitment type: Direct Replacement
  • thread size: M18
  • terminal type: Blade
  • universal or specific fit: Specific
  • attachment method: Screw-on
  • output signal range: 0.2v To 0.8v
  • mounting type: Threaded
  • position: Downstream, Sensor 1, Sensor 2
  • features: Direct Fit

returns acrasensor:

  • policy: Returns Accepted
  • time: 30 Days
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general acrasensor:

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

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  • # reviews: 44782

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  • started: August 28, 2025
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for models: mdx, rl, for makes: acura, for years: 2003-2006, type: sensor, manufacturer warranty: 1 year, custom bundle: yes, modified item: no, fitment type: direct replacement, thread size: m18, terminal type: blade, universal or specific fit: specific, attachment method: screw-on, output signal range: 0.2v to 0.8v, mounting type: threaded, position: downstream, sensor 1, sensor 2, features: direct fit,
category: auto parts > car truck parts accessories > air fuel delivery > acura air intake fuel sensors, sku: 5291678221887682,
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