1. Engine Cooling Components Deals
  2. sku: 21040559448188603
  3. MAZDA 17537QHPJ

MAZDA 17537QHPJ Ap Water Temperature Sensor RX8

fits make: Mazda. year: 2004–2011.

17537qhpj Replacement Ap For 2004-2011 Mazda Rx8 Water Temperature Sensor 2005

( Manufacturer Part Number: 17537QHPJ ), ( Part Type: Sensor ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: Engine Coolant Temperature Sensor ), ( Years: 2004 2005 2006 2007 2008 2009 2010 2011 ), ( Application: Mazda Rx8 Water Temperature Sensor ), ( Cs-sku: 400 )

Review MAZDA Replacement Ap Rx8 Water Temperature Sensor fits 2004–2011

The **AP17537QHPJ** is a high-performance, precision-engineered **water temperature sensor** specifically designed for **2004-2011 Mazda RX-8 models**, including the **2005 variant**, ensuring optimal engine performance, fuel efficiency, and longevity. Crafted with **durable stainless steel construction**, this sensor is built to withstand the harsh conditions of high-temperature environments while maintaining reliable accuracy. Its **resistor-type design** provides real-time feedback to the engine control unit (ECU), allowing for precise monitoring of coolant temperature, which is critical for proper ignition timing, fuel injection, and emissions control.

The **AP17537QHPJ** features a **high-quality thermistor element** encased in a robust, corrosion-resistant housing, ensuring long-term durability and resistance to leaks or electrical interference. This sensor is **OEM-compatible**, meaning it meets or exceeds the original equipment specifications, guaranteeing seamless integration with the RX-8 s engine management system without the need for additional modifications. Its **threaded connection** ensures a secure fit, preventing water ingress or signal loss, while its **resistant coating** protects against coolant degradation and potential corrosion over time.

Ideal for both **replacement and upgrade applications**, this sensor is a critical component for maintaining peak engine health, particularly in high-performance or modified RX-8 setups where precise temperature readings are essential. Whether replacing a failing original sensor or upgrading to a more reliable aftermarket option, the **AP17537QHPJ** delivers consistent performance, helping to prevent overheating, improve throttle response, and extend the lifespan of the engine. Its **universal compatibility** with the RX-8 s engine control system makes it a trusted choice for mechanics, enthusiasts, and DIYers seeking a dependable solution.

### **Pros and Cons of buying a AP17537QHPJ Water Temperature Sensor (2004-2011 Mazda RX-8, 2005 Model)**

#### **Pros:**

1. **Direct Fitment** This sensor is specifically designed for the 2004-2011 Mazda RX-8, including the 2005 model, ensuring compatibility without modifications.

2. **Reliability** AP (Automotive Parts) is a reputable brand known for producing high-quality, durable sensors that meet OEM standards.

3. **Accurate Readings** A properly functioning water temperature sensor ensures the engine control unit (ECU) receives precise data, optimizing fuel delivery, ignition timing, and overall engine performance.

4. **Prevents Engine Damage** A faulty sensor can lead to incorrect temperature readings, causing overheating, poor fuel economy, or even engine failure. Replacing it with a reliable part mitigates these risks.

5. **Easy Installation** The sensor is straightforward to replace, typically requiring only basic tools and minimal mechanical skill.

6. **Cost-Effective** While not the cheapest option, it is a reasonable investment compared to potential engine damage from a failing sensor.

7. **Warranty Coverage** Many reputable sellers offer warranties, providing peace of mind against defects.

#### **Cons:**

1. **Price** The AP17537QHPJ is more expensive than generic or aftermarket alternatives, which may not always be necessary if the part is identical in quality.

2. **Potential Counterfeit Risk** If purchased from an untrusted seller (e.g., unverified online marketplaces), there is a risk of receiving a counterfeit or low-quality part.

3. **Limited Availability** Depending on the seller, stock may be inconsistent, leading to delays in receiving the part.

4. **Mixed Reviews on Aftermarket Brands** While AP is generally reliable, some users report minor inconsistencies in fitment or performance compared to OEM parts, though this is rare.

5. **Overkill for Some Buyers** If the budget is tight, a slightly cheaper but equally reliable sensor from another brand (e.g., Denso, Bosch) might suffice.

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### **Conclusion**

The **AP17537QHPJ water temperature sensor** is a strong choice for a 2005 Mazda RX-8 due to its **direct fitment, brand reliability, and performance benefits**. While it is pricier than some alternatives, the trade-off in quality and longevity is often justified, especially for owners who prioritize durability and accurate engine monitoring.

If cost is a major concern, comparing it to **OEM or high-quality aftermarket alternatives (e.g., Denso 23400-0N000 or Bosch 0261226536)** may reveal comparable options at a lower price. However, for most RX-8 owners, the AP sensor provides a **balanced combination of reliability and ease of use**.

### **Recommendation**

- **Buy from a trusted seller** (e.g., Amazon, RockAuto, local auto parts stores with good reviews) to avoid counterfeit parts.

- **Verify compatibility** with your exact model year (2005) to ensure no variations exist.

- **Consider OEM or Denso alternatives** if the AP sensor is significantly overpriced in your region.

- **Replace the sensor promptly** if symptoms (check engine light, overheating, poor performance) persist, as prolonged use of a faulty sensor can damage the engine.

**Final Verdict:** The AP17537QHPJ is a **solid, recommended choice** for most RX-8 owners, balancing quality and performance. Proceed with purchase from a reputable source to ensure a hassle-free replacement.

Details:

12 Month Warranty Fitment Notes: 2-Pin Connector - Bolted With Seal, Vehicle: Sub model: 2008 Mazda RX8Grand Touring, RX8Touring, RX8Sport, 2005 RX8Shinka, 2004 - 2007 RX8Base.

part #: 17537qhpj price

  • $12.60

specifications ocoosys:

  • for makes: Mazda
  • for years: 2004-2011
  • mpn: 17537qhpj
  • part type: Sensor
  • manufacturer warranty: 12 Month Warranty
  • notes: Engine Coolant Temperature Sensor
  • years: 2004 2005 2006 2007 2008 2009 2010 2011
  • application: Mazda Rx8 Water Temperature Sensor
  • cs-sku: 400

seller ocoosys:

  • rating: 98.8%
  • city: Aurora, Colorado
  • # reviews: 328350

shipping ocoosys:

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

offer ocoosys:

  • options: Ship-to-home
  • quantity: 1
  • availability: In Stock
  • sold: 0
  • started: April 15, 2026

general ocoosys:

  • condition: New
  • Car Truck Parts Accessories > Engine Cooling Components > Other Engine Cooling Components

returns ocoosys:

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

payments ocoosys:

  • credit card: Mastercard
  • other
  • wallet: Google-pay
for makes: mazda, for years: 2004-2011, part type: sensor, manufacturer warranty: 12 month warranty, notes: engine coolant temperature sensor, years: 2004 2005 2006 2007 2008 2009 2010 2011, application: mazda rx8 water temperature sensor, cs-sku: 400,
category: auto parts > car truck parts accessories > engine cooling components, sku: 21040559448188603,
Mazda 17537QHPJ Is Similar To:
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2 offers $12.60–$12.60 USD
  • New. Offer #1 priced at $12.60 + $0.00 shipping estimate = $12.60* total. 2004-2007 Mazda RX8 Base 2008 Mazda RX8 Grand Touring.FREE SHIPPING
  • New. Offer #2 priced at $12.60 + $0.00 shipping estimate = $12.60* total. FREE SHIPPING

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