DELPHI SX-2338 Coolant Temperature Sensor 4.6L

( Brand: Delphi ), ( Manufacturer Part Number: SX-2338 ), ( Manufacturer Warranty: 1 Year / 12, 000 Miles ), ( Ipn: C475 69-50 ), ( Placement On Vehicle: Belts Cooling Sensors ), ( Compatible Model: Grand Marquis ), ( Compatible Year: 1998 1997 1996 1995 ), ( 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 Mercury 4.6l Nj fits MARQUIS GRAND 1995–1998

The **Delphi SX-2338 Coolant Temperature Sensor** is a precision-engineered, high-performance replacement part designed specifically to restore optimal engine efficiency and reliability in **1995 1998 Mercury Marquis vehicles equipped with the iconic 4.6L V8 engine**. This sensor is a direct OEM-quality substitute for the original equipment manufacturer s coolant temperature sensor, ensuring seamless compatibility with the Marquis s cooling system, fuel injection, and engine control module (ECM). Crafted from durable materials, the Delphi SX-2338 features a robust **thermistor-based design**, allowing it to accurately monitor the engine s coolant temperature and transmit real-time data to the vehicle s computer. This critical feedback enables the ECM to adjust fuel delivery, ignition timing, and other parameters for peak performance, fuel economy, and emissions compliance especially under varying operating conditions, from cold starts to high-load driving.

The sensor s **threaded stainless steel housing** is engineered for corrosion resistance, ensuring longevity even in harsh environments where road salt, moisture, or extreme temperatures may otherwise degrade inferior aftermarket alternatives. Its **precise calibration** aligns with the original sensor s specifications, preventing issues like rough idling, poor acceleration, or the dreaded "check engine" light due to incorrect temperature readings. Installation is straightforward, requiring only basic tools, as the Delphi SX-2338 fits snugly into the engine s coolant passage typically located near the thermostat housing with a standard **1-inch diameter thread pattern**. Whether replacing a failed sensor or upgrading during routine maintenance, this sensor delivers the reliability and accuracy demanded by Mercury s performance-oriented drivetrain, helping maintain the Marquis s legendary power and smooth operation for years to come.

**Pros and Cons of Buying a Delphi SX-2338 Coolant Temperature Sensor for a 1995 1998 Mercury Marquis (4.6L V8)**

1. **Compatibility and Fitment** The Delphi SX-2338 is specifically designed for the 4.6L Ford/Mercury V8 engines (including the Marquis), ensuring proper threading, electrical connections, and sensor range. It replaces the OEM sensor without modification, making installation straightforward.

2. **Reliability and Quality** Delphi is a reputable manufacturer with a strong reputation for automotive sensors. The SX-2338 is built to industry standards, reducing the risk of premature failure compared to cheaper, no-name alternatives.

3. **Accurate Readings** A functioning coolant temperature sensor ensures the engine control module (ECM) receives precise data on engine temperature. This helps with fuel mixture, ignition timing, and overall engine performance, preventing issues like overheating or rough idling.

4. **Easy Installation** The sensor is a direct drop-in replacement, requiring only basic tools (socket wrench, gasket scraper, and possibly a new gasket). No wiring harness modifications are needed, as the electrical connector matches the OEM design.

5. **Warranty and Support** Delphi parts often come with a manufacturer s warranty (typically 1 2 years), providing peace of mind. Additionally, the part is widely available through auto parts stores, online retailers, and dealerships.

6. **Cost-Effective Solution** While not the absolute cheapest option, the SX-2338 strikes a balance between price and quality. Cheaper sensors may fail quickly, leading to repeated replacements and potential engine damage if the ECM receives incorrect temperature signals.

7. **Prevents Diagnostic Trouble Codes (DTCs)** A faulty coolant temperature sensor can trigger a "Check Engine" light with codes like P0115, P0116, or P0117. Replacing it with a reliable sensor resolves the issue and avoids unnecessary diagnostic trouble.

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1. **Price** Compared to generic or no-name sensors, the Delphi part is more expensive. However, this cost is often justified by its reliability. Budget-conscious buyers may opt for a cheaper alternative, but this could lead to repeated failures.

2. **Potential Counterfeit or Low-Quality Copies** Some online sellers may offer "Delphi" sensors that are actually knockoffs. Always purchase from trusted retailers (e.g., RockAuto, Amazon Marketplace verified sellers, or local auto parts stores) to avoid counterfeit parts.

3. **Installation Challenges (Minor)** If the sensor housing is corroded or the gasket is stuck, removal can be difficult. In rare cases, the engine block or cylinder head may need cleaning or a new gasket to ensure a proper seal.

4. **Sensor Failure Over Time** While Delphi sensors are durable, all sensors degrade with age and mileage. If the original sensor failed due to extreme conditions (e.g., overheating, coolant leaks, or electrical issues), the new sensor may also fail prematurely. Addressing the root cause (e.g., coolant system leaks) can extend its lifespan.

5. **Compatibility with Modified Engines** If your Marquis has extensive modifications (e.g., forced induction, custom ECUs), ensure the sensor s output range aligns with your tuning setup. Most stock applications will not have issues, but performance builds may require verification.

6. **Limited Availability in Some Regions** Depending on where you live, the SX-2338 may not be stocked at every local parts store. Online retailers are the most reliable source for immediate availability.

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The **Delphi SX-2338 coolant temperature sensor is an excellent choice** for your 1995 1998 Mercury Marquis (4.6L) due to its proven compatibility, reliability, and ease of installation. It resolves common issues like "Check Engine" lights, poor idle, and overheating concerns while providing accurate data to the ECM. The minor drawbacks such as cost and potential counterfeit risks are outweighed by the part s performance and longevity compared to cheaper alternatives.

If you prioritize **durability, accuracy, and peace of mind**, the Delphi SX-2338 is the safest and most practical option. For those on a tight budget, a high-quality generic sensor (e.g., from ACDelco or Motorcraft) could be a viable alternative, but it carries slightly higher risk of failure.

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**Purchase the Delphi SX-2338 from a reputable retailer** (e.g., RockAuto, Amazon, or a local auto parts store with a return policy). Before buying, verify the part number matches your application (SX-2338 is correct for the 4.6L Ford/Mercury engines). If the sensor is part of a larger coolant system issue (e.g., leaks, clogged radiator), address those problems simultaneously to prevent future failures.

1. Disconnect the negative battery terminal.

2. Drain a small amount of coolant (or use a funnel to catch spills).

3. Remove the old sensor by unscrewing it counterclockwise (use a socket and extension if needed).

4. Clean the sensor housing and apply a thin layer of thread sealant or anti-seize to the threads.

5. Install the new sensor and tighten it to the manufacturer s specification (usually 20 30 ft-lbs).

6. Refill the coolant and reconnect the battery.

7. Clear any existing trouble codes with an OBD-II scanner.

If you encounter resistance during removal or installation, do not force the sensor inspect the housing for corrosion or damage. A new gasket or a penetrating oil (like PB Blaster) may be necessary.

**Final Verdict:** **Buy the Delphi SX-2338.** It s the best balance of quality, reliability, and compatibility for your vehicle.

Details:

Delphi Coolant Temperature Sensor for 1995 - 1998 Mercury Grand Marquis 4.6L nj: Status: In Stock.

part #: sx2338 prices

• $42.93-$78.30

specifications ocoosys:

• for models: Marquis, Grand
• for makes: Mercury
• for years: 1995-1998
• brand: Delphi
• mpn: Sx-2338
• manufacturer warranty: 1 Year / 12, 000 Miles
• ipn: C475 69-50
• placement on vehicle: Belts Cooling Sensors
• compatible model: Grand Marquis
• compatible year: 1998 1997 1996 1995
• 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

offer ocoosys:

• started: May 3, 2026
• availability: In Stock
• sold: 0
• quantity: 6
• options: Ship-to-home

returns ocoosys:

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

payments ocoosys:

• credit card: Diners-club
• wallet: Google-pay
• other

seller ocoosys:

• rating: 99.6%
• # reviews: 652638
• city: Indianapolis, Indiana

general ocoosys:

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

shipping ocoosys:

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

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