DELPHI SX-4377 Coolant Temperature Sensor Engine Bq K900 3.8L V6

( Brand: Delphi ), ( Manufacturer Part Number: SX-4377 ), ( Manufacturer Warranty: 1 Year / 12, 000 Miles ), ( Ipn: C590 65-45 ), ( Placement On Vehicle: Belts Cooling Sensors ), ( Compatible Model: K900 ), ( Compatible Year: 2017 2016 ), ( Core Charge: Free No Core Charge ), ( Type: Engine Coolant Temperature Sensor ), ( Universal Fitment: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Delphi Engine Coolant Temperature Sensor )

Review DELPHI Coolant Temperature Sensor Kia 3.8l V6 Engine Bq fits 2016–2017

The Delphi SX-4377 Coolant Temperature Sensor is a precision-engineered, high-performance replacement part designed specifically for the 2016 2017 Kia K900 equipped with the 3.8L V6 engine (BQ code). This sensor plays a critical role in maintaining optimal engine performance, fuel efficiency, and emissions compliance by continuously monitoring the temperature of the engine coolant. Crafted from durable materials, the Delphi SX-4377 features a robust thermistor element encased in a corrosion-resistant housing, ensuring long-lasting reliability even under demanding driving conditions. The sensor s threaded design allows for a secure, leak-free installation, while its precise calibration guarantees accurate readings to the engine s Electronic Control Unit (ECU), enabling the correct fuel-air mixture, ignition timing, and cooling system operation. Whether navigating city traffic or cruising on the highway, this sensor helps prevent overheating, reduces engine wear, and supports the vehicle s advanced diagnostic systems. Backed by Delphi s reputation for quality and compatibility, the SX-4377 is a direct-fit, OEM-level replacement that restores factory performance and extends the lifespan of your Kia K900 s cooling and fuel systems.

### Pros and Cons of buying a Delphi SX-4377 Coolant Temperature Sensor for a 2016-2017 Kia K900 (3.8L V6 Engine, BQ)

1. **Direct Fitment** The Delphi SX-4377 is specifically designed as an OEM replacement for the Kia K900 s coolant temperature sensor, ensuring compatibility with the 3.8L V6 engine (BQ platform). This reduces the risk of installation issues or improper sizing.

2. **High-Quality Materials** Delphi is a well-known automotive parts manufacturer with a reputation for durable, reliable sensors. The sensor is built to meet or exceed OEM specifications, which can improve longevity compared to aftermarket knockoffs.

3. **Accurate Readings** A properly functioning coolant temperature sensor ensures the engine control module (ECM) receives precise data about engine temperature. This helps optimize fuel delivery, ignition timing, and overall engine performance, preventing issues like overheating or poor cold starts.

4. **Warranty Coverage** Delphi parts often come with manufacturer warranties (typically 1 2 years), providing some assurance against defects. This can be a selling point if the sensor fails prematurely.

5. **Ease of Installation** Since it s an OEM replacement, the sensor should fit seamlessly into the existing mounting location without requiring modifications. The threaded design and gasket (if included) should align correctly with the engine block.

6. **Prevents Diagnostic Trouble Codes (DTCs)** A faulty coolant temperature sensor can trigger a "Check Engine" light and codes like P0115, P0116, or P0117. Replacing it with a reliable sensor like the Delphi part can resolve these issues and avoid unnecessary diagnostic trouble.

7. **Compatibility with Aftermarket Tuning** If you plan to modify or tune your K900, an accurate sensor ensures the ECM has the right data to adjust parameters correctly, preventing potential damage from incorrect tuning.

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1. **Cost** The Delphi SX-4377 is priced higher than some generic or no-name aftermarket alternatives. While it s a premium choice, budget-conscious buyers may opt for cheaper options, though this could risk reliability.

2. **Potential Counterfeit Risks** Purchasing from untrusted sellers (e.g., third-party Amazon vendors or eBay resellers) could result in counterfeit or refurbished parts. Always buy from authorized dealers, official distributors, or reputable online retailers (e.g., RockAuto, Amazon s verified sellers, or local auto parts stores).

3. **Installation Complexity (Minor)** While the sensor itself is straightforward to replace, accessing it may require removing the engine cover or air intake components. Some buyers may find the process slightly more involved than expected, especially if they lack mechanical experience.

4. **Limited Availability** Depending on the region, stock availability for OEM-level parts like this may be inconsistent. Some retailers may not carry it in-store, requiring online ordering with potential shipping delays.

5. **Overkill for Minor Issues** If the sensor is only slightly degraded (e.g., minor corrosion or intermittent failure), a cheaper replacement might suffice. However, if the sensor is completely faulty, the Delphi part is a safe, long-term solution.

6. **No Additional Features** Unlike some aftermarket sensors, the Delphi part does not include extras like extended warranties, lifetime replacements, or bundled gaskets (though it should come with a gasket). Buyers must verify what s included in the package.

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The **Delphi SX-4377 coolant temperature sensor** is an excellent choice for the 2016 2017 Kia K900 s 3.8L V6 engine due to its **direct fitment, reliability, and accuracy**. It strikes a balance between OEM quality and aftermarket convenience, making it ideal for those who prioritize performance, longevity, and peace of mind over cost savings. While it may be pricier than generic alternatives, the risk of failure or compatibility issues is significantly lower, which can save money in the long run by avoiding repeated replacements or engine damage from incorrect sensor readings.

For buyers on a tight budget who are confident in their ability to verify the part s authenticity, a **high-quality aftermarket sensor (e.g., ACDelco, Bosch, or Motorcraft)** could be a viable alternative. However, if budget is not a concern and reliability is the top priority, the Delphi part is a **strongly recommended** choice.

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- You want an **OEM-level replacement** with guaranteed compatibility.

- You prioritize **accuracy and durability** over cost.

- You re purchasing from a **trusted seller** (e.g., RockAuto, local auto parts store, or Kia dealer).

- You plan to **tune or modify** your K900, as an accurate sensor is critical.

- You re on a **strict budget** and can verify the authenticity of a cheaper sensor.

- You re comfortable with **aftermarket brands** (e.g., ACDelco GMQ 9045, Bosch 0 261 103 003) that offer similar performance at a lower price.

- You re unsure about the **current condition of the sensor** (e.g., minor corrosion) and might get away with a less expensive fix.

- **RockAuto** (for direct OEM parts)

- **Local Kia dealers or auto parts stores** (e.g., AutoZone, O Reilly, Advance Auto)

- **Amazon (verified seller listings only)**

- **eBay (from trusted sellers with high ratings)**

Always **inspect the sensor for damage** upon arrival and **replace the gasket** if it s not included to prevent coolant leaks. If you re unsure about installation, consult a mechanic or follow a **detailed YouTube guide** for your specific K900 model.

Details:

Delphi Coolant Temperature Sensor for 2016 - 2017 Kia K900 3.8L V6 Engine bq: Status: In Stock.

part #: sx4377 prices

• $36.50-$60.00

specifications ocoosys:

• for makes: Kia
• for years: 2016-2017
• brand: Delphi
• mpn: Sx-4377
• manufacturer warranty: 1 Year / 12, 000 Miles
• ipn: C590 65-45
• placement on vehicle: Belts Cooling Sensors
• compatible model: K900
• compatible year: 2017 2016
• core charge: Free No Core Charge
• type: Engine Coolant Temperature Sensor
• universal fitment: Direct Replacement
• bundle description: 1 Pc Genuine Delphi Engine Coolant Temperature Sensor

payments ocoosys:

• credit card: Discover
• other
• wallet: Paypal

general ocoosys:

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

returns ocoosys:

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

shipping ocoosys:

• transit: 3-6 Days
• service: Standard, Expedited
• type: Fixed
• cost: $0.00
• class: Standard, Expedited

offer ocoosys:

• quantity: 5
• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: February 8, 2026

seller ocoosys:

• # reviews: 620548
• city: Indianapolis, Indiana
• rating: 99.5%

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