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  3. API TECH 55CZPN

API SERVICE TECH 55CZPN Water Temperature Sender

fits model: Colt. make: Plymouth. year: 1990–1994.

55czpn Api Service Tech Water Temperature Sender Fits Plymouth Colt 1990-1994

( Brand: Api Service Tech ), ( Manufacturer Part Number: 55CZPN ), ( Part Type: Sender ), ( Engine: 1.5l 4 Cyl, 1.8l 4 Cyl, 2.4l 4 Cyl ), ( Compatible Make/model: Plymouth Colt ), ( Compatible Years: 1990 1991 1992 1993 1994 90 91 92 93 94 ), ( Fitment Info: Service Tech For Gauge ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Read Full Description To Confirm Fitment ), ( Cs-sku: 400 )

Review API SERVICE TECH Water Temperature Sender Plymouth fits COLT 1990–1994

The **55CZPN Water Temperature Sender** is a precision-engineered sensor designed specifically for Plymouth Colt models manufactured between 1990 and 1994, ensuring seamless integration with the vehicle s cooling system to monitor engine temperature with accuracy and reliability. This high-performance thermostat sensor, often referred to as a water temperature sender or coolant temperature sender, plays a critical role in maintaining optimal engine performance by providing real-time feedback to the vehicle s cooling system and dashboard gauge. Crafted from durable materials, including a robust metal housing and a temperature-sensitive resistor (typically a Negative Temperature Coefficient or NTC thermistor), the 55CZPN is engineered to withstand the harsh conditions of automotive environments, including exposure to coolant, heat, and vibration. Its compact yet sturdy design allows for easy installation, fitting snugly into the engine bay s coolant passage near the thermostat housing, where it accurately measures the temperature of the coolant as it circulates through the engine block and head. The sensor s electrical output varies inversely with temperature, sending a signal to the vehicle s cooling system control module or gauge sender unit, which then displays the temperature on the dashboard or triggers cooling system alerts if the engine overheats. Ideal for both restoration projects and routine maintenance, this sensor is a direct-fit replacement for the original equipment manufacturer (OEM) part, ensuring compatibility without the need for modifications. Whether you're a mechanic, a DIY enthusiast, or a collector preserving the integrity of your 1990-1994 Plymouth Colt, the 55CZPN Water Temperature Sender guarantees dependable performance, helping to prevent engine damage from overheating while providing peace of mind with its long-lasting durability and precise temperature readings.

**Pros and Cons of buying a API Service 55CZPN Water Temperature Sender for a Plymouth Colt (1990-1994)**

### **Pros**

1. **Compatibility** The 55CZPN is specifically designed for the Plymouth Colt (1990-1994) and other Chrysler vehicles from the same era, ensuring a direct fit without extensive modifications.

2. **Reliability** API (Automotive Parts International) is a well-known brand in the aftermarket parts industry, known for producing durable and high-quality sensors. The 55CZPN is a common replacement part, meaning it has been tested by many mechanics and owners over the years.

3. **Easy Installation** Since it is a direct replacement for the original water temperature sender, installation typically requires only basic tools (screwdriver, socket set, and possibly a new thermostat housing gasket). No wiring changes are usually needed unless the harness is damaged.

4. **Cost-Effective** Compared to OEM (Original Equipment Manufacturer) parts, the 55CZPN is often significantly cheaper while maintaining similar performance. This makes it a practical choice for budget-conscious buyers.

5. **Widespread Availability** As a common part, it can be found at most auto parts stores (both online and physical), making it easy to purchase without long wait times.

6. **Prevents Engine Damage** A faulty water temperature sender can lead to inaccurate readings, potentially causing the engine to overheat or run inefficiently. Replacing it ensures proper temperature monitoring and helps avoid costly engine damage.

7. **Compatibility with Modern Diagnostics** Since the 55CZPN is a standard OEM-style sensor, it will work seamlessly with modern OBD-I and OBD-II scanners, allowing for accurate diagnostics if issues arise later.

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### **Cons**

1. **Potential Counterfeit Parts** Due to its popularity, there is a risk of purchasing a counterfeit or low-quality knockoff, especially when buying from untrusted online sellers. Always verify the seller s reputation and check for authenticity markings.

2. **Mixed Quality Control** While API is a reputable brand, quality can vary slightly between batches or distributors. Some units may have minor defects (e.g., loose wiring, slightly corroded pins) that could cause intermittent issues.

3. **Thermostat Housing Compatibility** If the original thermostat housing is worn or damaged, replacing just the sender may not fully resolve temperature-related issues. The housing itself may need replacement, adding to the cost.

4. **Limited Longevity Compared to OEM** While the 55CZPN is durable, some owners report that aftermarket sensors may not last as long as genuine OEM parts, which are often built to stricter tolerances.

5. **Wiring or Connector Issues** In some cases, the wiring harness or connector where the sender plugs in may be corroded or damaged, leading to false readings even with a new sensor. Inspecting these components during installation is crucial.

6. **No Warranty on Some Retailers** Unlike purchasing from a dealership or authorized distributor, some online retailers may not offer a warranty or return policy, leaving you without recourse if the part fails shortly after purchase.

7. **Potential for Inaccurate Readings** While rare, some aftermarket sensors may not calibrate perfectly with the vehicle s ECM (Engine Control Module), leading to slight inaccuracies in temperature readings. This is usually minor but worth considering for precision applications.

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### **Conclusion**

The **API Service 55CZPN water temperature sender** is a **strong, cost-effective choice** for replacing a faulty sender in a 1990-1994 Plymouth Colt. Its **direct compatibility, reliability, and ease of installation** make it a practical option for most DIYers and mechanics. However, **buyers should exercise caution** to avoid counterfeit parts and ensure the thermostat housing and wiring are in good condition. For those prioritizing **long-term reliability and warranty coverage**, an OEM replacement may be preferable, though it comes at a higher cost.

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### **Recommendation**

- **Buy from a reputable source** (e.g., RockAuto, Amazon with verified sellers, or a trusted local auto parts store) to avoid counterfeit parts.

- **Inspect the thermostat housing and wiring** before installation to ensure they are not contributing to the issue.

- **Test the new sender** after installation by monitoring the temperature gauge and checking for accurate readings under normal driving conditions.

- **Consider an OEM part** only if budget is not a concern, as it may offer slightly better longevity and warranty support.

- **Pair with a new thermostat gasket** if the original is damaged to prevent leaks.

For the average owner, the **55CZPN is a solid, budget-friendly replacement** that will restore proper temperature sensing without major hassle. If issues persist after replacement, verify wiring connections and consider professional diagnostics.

Details:

API SERVICE TECH Water Temperature Sender fits Plymouth Colt 1990 - 1994 55CZPN: Brand: condition: New Notes: For Gauge, Detailed Applications Years: Vehicle: Engine: 1992 - 1994 Plymouth Colt1.8L 4 Cyl, Colt1.5L Colt2.4L 1990 - 1991 Plymouth.

part #: 55czpn price

  • $33.47

specifications ocoosys:

  • for models: Colt
  • for makes: Plymouth
  • for years: 1990-1994
  • brand: Api Service Tech
  • mpn: 55czpn
  • part type: Sender
  • engine: 1.5l 4 Cyl, 1.8l 4 Cyl, 2.4l 4 Cyl
  • compatible make/model: Plymouth Colt
  • compatible years: 1990 1991 1992 1993 1994 90 91 92 93 94
  • fitment info: Service Tech For Gauge
  • manufacturer warranty: 12 Month Warranty
  • attention: Read Full Description To Confirm Fitment
  • cs-sku: 400

offer ocoosys:

  • quantity: 1
  • sold: 0
  • options: Ship-to-home
  • availability: In Stock
  • started: March 26, 2026

general ocoosys:

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

returns ocoosys:

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

seller ocoosys:

  • # reviews: 23429
  • rating: 99.1%
  • city: Green Harbor, Massachusetts

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shipping ocoosys:

  • type: Fixed
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for models: colt, for makes: plymouth, for years: 1990-1994, part type: sender, engine: 1.5l 4 cyl, 1.8l 4 cyl, 2.4l 4 cyl, compatible make/model: plymouth colt, compatible years: 1990 1991 1992 1993 1994 90 91 92 93 94, fitment info: service tech for gauge, manufacturer warranty: 12 month warranty, attention: read full description to confirm fitment, cs-sku: 400,
category: auto parts > car truck parts accessories > engine cooling components, sku: 20614870280961731,
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1 offer $33.47 USD
  • New. Offer #1 priced at $33.47 + $0.00 shipping estimate = $33.47* total. Detailed Applications. 1992-1994 Plymouth Colt 1.8L 4 Cyl.FREE SHIPPING

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