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  3. API QK37Q9

API QK37Q9 Upstream Air Fuel Level Sensor 2.4L

fits model: K24a2, Tsx, Fi. make: Acura. year: 2004–2008.

Qk37q9 Api Upstream Air Fuel Ratio Sensor For 04-08 Acura Tsx 2.4l 4 Cyl K24a2 Fi

( Brand: Api ), ( Manufacturer Part Number: QK37Q9 ), ( Part Type: Fuel Sensor ), ( Placement On Vehicle: Upstream ), ( Product Warranty: 12 Month Warranty ), ( Part Info: Air / Fuel Ratio Sensor ), ( Years: 2004 2006 2008 2005 2007 04 06 08 05 07 ), ( Models: Tsx ), ( Important: Please Read All Notes Before Making This Purchase ), ( Cs-sku: 400 )

Review API Upstream Air Fuel Ratio Sensor Acura 2.4l Cyl fits K24A2 TSX FI 2004–2008

The API QK37Q9 Upstream Air Fuel Ratio Sensor is a crucial component of the fuel injection system in select 2004-2008 Acura TSX models equipped with the 2.4L K24A2 engine and Factory Integrated (FI) system. This sensor plays a vital role in maintaining optimal air-fuel mixture for efficient combustion and reduced emissions.

The upstream air fuel ratio sensor is designed as a zirconia oxygen sensor, which measures the amount of oxygen present in the exhaust gas stream. By calculating the ratio of the oxygen content in the exhaust gas to the oxygen content in the ambient air, the sensor can determine the air-fuel ratio in the engine. This information is then used by the engine management system to adjust the fuel injection and ignition timing for optimal performance and emissions compliance.

The sensor is mounted in the exhaust manifold or near the catalytic converter, allowing it to measure the oxygen content in the exhaust gas as it exits the engine. The sensor element is protected by a ceramic shield, ensuring its durability and resistance to high temperatures and corrosive exhaust gases. The sensor also features a Heater Element, which helps the sensor reach operating temperature quickly for accurate readings.

The API QK37Q9 sensor is a direct replacement for the original equipment sensor on the specified Acura TSX models. It comes with all necessary hardware, including the wiring harness, for a straightforward installation process. The sensor is also covered by a comprehensive warranty to ensure customer satisfaction and peace of mind.

By choosing the API QK37Q9 Upstream Air Fuel Ratio Sensor, you can restore optimal performance and emissions compliance to your Acura TSX, ensuring a smoother driving experience and improved fuel efficiency.

Buying an upstream air fuel level sensor (API QK37Q9) for a 2004-2008 Acura TSX with a 2.4L K24A2 engine and FI system involves considering its potential benefits and drawbacks. Here's a brief analysis:

Benefits:

1. Improved Engine Performance: A faulty upstream air fuel level sensor can cause poor fuel economy, misfires, and a rough idling engine. Replacing the faulty sensor with a new one can help restore proper engine performance.

2. Check Engine Light: A malfunctioning sensor can cause the check engine light to come on. Replacing the sensor with a new one can help turn off the light, allowing the vehicle's warning system to function correctly.

3. Preventing Further Damage: Ignoring a faulty upstream air fuel level sensor can cause more significant problems, including damage to the catalytic converter or even the engine itself. Replacing the sensor now can save you from more expensive repairs down the line.

Drawbacks:

1. Cost: The cost of purchasing and installing a new upstream air fuel level sensor can be relatively high, especially when considering the labor costs for installation.

2. Time: Replacing the sensor requires removing the intake manifold, which can be a time-consuming process.

3. Risk of Damage: Removing the intake manifold exposes the engine to potential damage, especially if not done correctly.

Conclusion:

Replacing a faulty upstream air fuel level sensor (API QK37Q9) in a 2004-2008 Acura TSX with a 2.4L K24A2 engine can help restore proper engine performance, prevent further damage, and turn off the check engine light. However, the cost and time involved in the replacement process are significant drawbacks.

Recommendation:

If you notice symptoms of a faulty upstream air fuel level sensor, such as poor fuel economy, rough idling, or a check engine light, it's recommended to replace the sensor as soon as possible. Considering the potential consequences of ignoring the issue, the cost and time involved may be worth the investment to ensure the continued reliable operation of your vehicle. If you're not comfortable performing the replacement yourself, consider taking your vehicle to a professional mechanic.

Details:

Wire Quantity:4. Air / Fuel Ratio Sensor. Acura TSX 2004 - 2008 2.4L 4 Cyl K24A2 FI Naturally Aspirated GAS. Make model Years Engine.

Wiring Harness length :622.40.

part #: qk37q9 price

  • $119.95

specifications acrasensor:

  • for models: K24a2, Tsx, Fi
  • for makes: Acura
  • for years: 2004-2008
  • brand: Api
  • mpn: Qk37q9
  • part type: Fuel Sensor
  • placement on vehicle: Upstream
  • product warranty: 12 Month Warranty
  • part info: Air / Fuel Ratio Sensor
  • years: 2004 2006 2008 2005 2007 04 06 08 05 07
  • models: Tsx
  • important: Please Read All Notes Before Making This Purchase
  • cs-sku: 400

shipping acrasensor:

  • carrier: FedEx
  • cost: $0.00
  • service: FedEx Ground or FedEx Home Delivery
  • transit: 4-10 Days
  • class: Standard
  • type: Fixed

returns acrasensor:

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

general acrasensor:

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

seller acrasensor:

  • # reviews: 50230
  • city: Rehoboth, Massachusetts
  • rating: 95.3%

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offer acrasensor:

  • options: Ship-to-home
  • started: June 28, 2025
  • quantity: 1
  • availability: In Stock
  • sold: 0
for models: k24a2, tsx, fi, for makes: acura, for years: 2004-2008, part type: fuel sensor, placement on vehicle: upstream, product warranty: 12 month warranty, part info: air / fuel ratio sensor, years: 2004 2006 2008 2005 2007 04 06 08 05 07, models: tsx, important: please read all notes before making this purchase, cs-sku: 400,
category: auto parts > car truck parts accessories > air fuel delivery > acura air intake fuel sensors, sku: 5083760053184791,
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