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  3. AUTOPART PREMIUM 21RTHM

AUTOPART PREMIUM 21RTHM Downstream Rear Oxygen Sensor

fits model: Nsx. make: Acura. year: 2000–2005.

21rthm Autopart Premium Downstream Rear Oxygen Sensor Fits Acura Nsx 2000-2005

( Brand: Autopart Premium ), ( Manufacturer Part Number: 21RTHM ), ( Part Type: Sensor ), ( Engine: 3.0l V6, 3.2l V6, 3.2l V6 C32b1, 3.0l V6 C30a1 ), ( Trim: Base, T ), ( Compatible Make/model: Acura Nsx ), ( Compatible Years: 2000 2001 2002 2003 2004 2005 00 01 02 03 04 05 ), ( Position: Downstream Rear ), ( Fitment Info: Oxygen Sensor ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Read Full Description To Confirm Fitment ), ( Cs-sku: 400 )

Review AUTOPART PREMIUM Downstream Rear Oxygen Sensor Acura fits NSX 2000–2005

Acura NSX (2000-2005) Downstream Rear Oxygen Sensor

The downstream rear oxygen sensor is an essential component of the exhaust system in Acura NSX models manufactured between 2000 and 2005. This sensor plays a crucial role in maintaining optimal engine performance and ensuring the vehicle's emissions system functions efficiently.

This oxygen sensor is designed specifically for the downstream position in the exhaust system, which means it measures the oxygen content in the exhaust gases right before they exit the catalytic converter. By analyzing the oxygen levels, the engine management system can adjust the fuel-air mixture for efficient combustion and optimal engine performance.

The Acura NSX downstream rear oxygen sensor is a heated zirconia sensor. It features a ceramic sensing element coated with a thin layer of zirconia material to facilitate the rapid oxidation of oxygen molecules in the exhaust gases. The sensor also includes a heating element to maintain an optimal operating temperature, ensuring accurate sensor readings and stable performance.

The sensor housing is made of high-quality materials, designed to withstand the extreme temperatures and harsh conditions of the exhaust system. It is also equipped with a protective shield to prevent damage from debris and other contaminants in the exhaust gases.

Installation of the downstream rear oxygen sensor is relatively straightforward for experienced DIY mechanics or professional technicians. However, it is essential to follow the proper installation procedures to ensure accurate sensor readings and maintain the overall health of the exhaust system.

When replacing the downstream rear oxygen sensor, it is important to use a high-quality, original equipment manufacturer (OEM) part to maintain the performance and longevity of the exhaust system. A faulty sensor can result in poor fuel efficiency, decreased engine performance, and increased emissions, which may require costly repairs or lead to failure of other components in the exhaust system.

In summary, the Acura NSX (2000-2005) downstream rear oxygen sensor is an essential component of the exhaust system that plays a crucial role in maintaining optimal engine performance and ensuring the vehicle's emissions system functions efficiently. This heated zirconia sensor features a ceramic sensing element and a heating element to maintain optimal operating temperature, and its housing is designed to withstand the harsh conditions of the exhaust system. To maintain the performance and longevity of the exhaust system, it is important to use a high-quality, original equipment manufacturer (OEM) sensor when replacement is necessary.

Buying an autopart 21rthm downstream rear oxygen sensor for an Acura NSX 2000-2005 involves considering several factors before making a decision. Here are some pros and cons to help you make an informed decision.

Pros:

1. Improved Fuel Efficiency: A faulty oxygen sensor can cause the engine to run rich or lean, leading to poor fuel efficiency. Replacing the sensor can help restore optimal fuel efficiency.

2. Better Emissions: A malfunctioning oxygen sensor can cause the vehicle to emit higher levels of pollutants. Replacing the sensor can help reduce emissions and improve air quality.

3. Longer Engine Life: A faulty oxygen sensor can cause damage to the catalytic converter and other engine components over time. Replacing the sensor can help prevent costly repairs down the line.

4. Check Engine Light: A faulty oxygen sensor can cause the check engine light to come on. Replacing the sensor can help prevent the annoying warning light from illuminating.

Cons:

1. Cost: Replacing an oxygen sensor can be an expensive repair, especially for a high-performance vehicle like the Acura NSX. The cost can range from $150 to $500 or more, depending on the brand and quality of the sensor.

2. Labor Costs: If you're not comfortable doing the repair yourself, you'll need to pay for labor costs, which can add to the overall cost of the repair.

3. Potential for False Positives: Sometimes, a faulty oxygen sensor can cause false readings, which can lead to unnecessary repairs. It's important to have the sensor diagnosed by a qualified technician before replacing it.

Conclusion:

Replacing an autopart 21rthm downstream rear oxygen sensor in an Acura NSX 2000-2005 can help improve fuel efficiency, reduce emissions, prevent damage to engine components, and turn off the check engine light. However, the cost of the repair can be significant, and there's a risk of false positives. It's important to have the sensor diagnosed by a qualified technician before making a decision.

Recommendation:

If you're experiencing symptoms of a faulty oxygen sensor, such as poor fuel efficiency, increased emissions, or a check engine light, it's recommended to have the sensor diagnosed by a qualified technician. If the sensor is indeed faulty, it's important to consider the potential benefits and costs before making a decision to replace it. If the cost is a concern, consider shopping around for the best price on the sensor and comparing prices from different repair shops.

Details:

Years: Vehicle: Engine: Transmission: Fitment Notes: Standard Transmission, 2000 - 2005 Acura NSX3.2L V6 C32B1Manual. Detailed Applications Years: Vehicle: Sub model: Engine: Fitment Notes: Automatic Transmission; Engine Code: C30A1, 2000 - 2003 Acura NSXT3.0L V6, 2000 - 2001, 2004 - 2005 Acura NSXBase3.0L V6. Downstream Rear Autopart Premium Oxygen Sensor fits Acura NSX 2000 - 2005 21RTHM: Position: Brand: condition: New Notes: Detailed O2 for CL TL Honda Accord Civic Odyssey, Specifications Connector: 4. Years: Vehicle: Sub model: Engine: Fitment Notes: Standard Transmission; Engine Code: C32B1, 2000 - 2003 Acura NSXT3.2L V6, 2000 - 2001, 2004 - 2005 Acura NSXBase3.2L V6.

part #: 21rthm price

  • $27.20

specifications acrasensor:

  • for models: Nsx
  • for makes: Acura
  • for years: 2000-2005
  • brand: Autopart Premium
  • mpn: 21rthm
  • part type: Sensor
  • engine: 3.0l V6, 3.2l V6, 3.2l V6 C32b1, 3.0l V6 C30a1
  • trim: Base, T
  • compatible make/model: Acura Nsx
  • compatible years: 2000 2001 2002 2003 2004 2005 00 01 02 03 04 05
  • position: Downstream Rear
  • fitment info: Oxygen Sensor
  • manufacturer warranty: 12 Month Warranty
  • attention: Read Full Description To Confirm Fitment
  • cs-sku: 400

seller acrasensor:

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  • city: Miami, Florida
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offer acrasensor:

  • options: Ship-to-home
  • availability: In Stock
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  • quantity: 4
  • started: March 27, 2026

general acrasensor:

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

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shipping acrasensor:

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  • type: Fixed
for models: nsx, for makes: acura, for years: 2000-2005, part type: sensor, engine: 3.0l v6, 3.2l v6, 3.2l v6 c32b1, 3.0l v6 c30a1, trim: base, t, compatible make/model: acura nsx, compatible years: 2000 2001 2002 2003 2004 2005 00 01 02 03 04 05, position: downstream rear, fitment info: oxygen sensor, manufacturer warranty: 12 month warranty, attention: read full description to confirm fitment, cs-sku: 400,
category: auto parts > car truck parts accessories > air fuel delivery > acura air intake fuel sensors, sku: 5887417788961731,
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1 offer $27.20 USD
  • New. Offer #1 priced at $27.20 + $0.00 shipping estimate = $27.20* total. 2000-2005 Acura NSX 3.2L V6 C32B1 Manual. Position: Downstream Rear.FREE SHIPPING

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