BECK ARNLEY 158-1690 Coolant Temperature Sensor 500L
fits model: 500x, 500. make: Fiat. year: 2012–2019.
( Brand: Beck Arnley ), ( Manufacturer Part Number: 158-1690 ), ( Part Type: Sensor ), ( Country Of Origin: Italy )
Review BECK ARNLEY Coolant Temperature Sensor Fiat fits 500X 500 2012–2019
The **Beck Arnley 158-1690 Coolant Temperature Sensor** is a high-performance, precision-engineered replacement part designed specifically for the **2012 2019 Fiat 500, 500L, and 500X** models equipped with the **1.2L or 1.4L turbocharged engines** (M13C, M13D, and M13E variants). This sensor plays a critical role in maintaining optimal engine performance by monitoring the temperature of the coolant, ensuring efficient combustion, fuel delivery, and emissions control. Crafted from durable materials, including a robust **thermistor element** encased in a corrosion-resistant housing, this sensor is built to withstand the demanding conditions of modern automotive systems while delivering accurate and reliable readings to the engine control unit (ECU).
The **Beck Arnley 158-1690** stands out for its **OEM-level quality**, featuring a **threaded 18mm x 1.5mm connection** that ensures a secure and leak-free fit, preventing coolant leaks that could lead to overheating or false engine diagnostics. Unlike generic aftermarket alternatives, this sensor is **calibration-matched** to Fiat s engine management systems, eliminating the risk of incorrect temperature readings that could trigger check engine lights or cause fuel efficiency issues. Its **responsive thermistor design** provides real-time feedback, allowing the ECU to adjust the air-fuel mixture, ignition timing, and cooling system performance with precision, thereby enhancing throttle response, reducing emissions, and prolonging engine longevity.
Ideal for both **original equipment replacement (OER)** and **performance upgrades**, the Beck Arnley sensor is compatible with **direct-injection (GDI) and turbocharged applications**, making it a trusted choice for mechanics, tuners, and DIY enthusiasts working on these popular Fiat models. Its **long-lasting durability** is further reinforced by a **sealed, gasket-free design**, minimizing the risk of coolant leaks and ensuring consistent performance even under high-stress conditions. Whether replacing a worn-out factory sensor or upgrading for improved reliability, the **Beck Arnley 158-1690** delivers the accuracy, compatibility, and robustness required to keep your Fiat 500, 500L, or 500X running at peak efficiency.
### Pros and Cons of buying a Beck Arnley 158-1690 Coolant Temperature Sensor for 2012 2019 Fiat 500, 500L, and 500X
#### **Pros:**1. **Compatibility** This sensor is specifically designed for the 1.2L and 1.4L engines found in the 2012 2019 Fiat 500, 500L, and 500X models, ensuring a direct fit without modification.
2. **Quality Construction** Beck Arnley is a reputable brand known for producing reliable automotive sensors. The 158-1690 model is built to meet or exceed OEM standards, reducing the risk of premature failure.
3. **Easy Installation** The sensor is designed for straightforward replacement, requiring minimal tools and no special expertise. Most users can install it themselves in under an hour.
4. **Cost-Effective** Compared to OEM sensors, this aftermarket option is significantly cheaper while maintaining performance and durability.
5. **Warranty Coverage** Beck Arnley typically offers a warranty (often 1 2 years), providing peace of mind against defects.
6. **Improved Engine Performance** A faulty coolant temperature sensor can cause misfires, poor fuel economy, and overheating. Replacing it with a reliable unit restores proper engine function.
7. **Prevents Further Damage** Ignoring a failing sensor can lead to more expensive repairs, such as engine damage from overheating or catalytic converter issues.
#### **Cons:**1. **Potential Counterfeit Risk** Some aftermarket sensors, including those from lesser-known sellers, may be counterfeit or of lower quality. Always purchase from trusted retailers to avoid this.
2. **Mismatched Specifications (Rare)** While rare, there is a slight chance the sensor may not perfectly match the OEM s exact specifications, though Beck Arnley s reputation minimizes this risk.
3. **No OEM-Like Longevity (Subjective)** While high-quality, some drivers report that aftermarket sensors may not last as long as OEM parts, though this varies by driving conditions.
4. **Limited Availability of Parts** If the sensor fails again, finding an exact replacement may require checking multiple suppliers, though Beck Arnley is widely stocked.
5. **Installation Challenges (If Sensor is Stubborn)** In some cases, the sensor may be difficult to remove due to corrosion or a tight fit, requiring penetrating oil or extra force.
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### **Conclusion**
The **Beck Arnley 158-1690 coolant temperature sensor** is an excellent choice for the 2012 2019 Fiat 500, 500L, and 500X. It offers a strong balance of **cost-effectiveness, reliability, and ease of installation**, making it a practical alternative to OEM parts. The brand s reputation ensures quality, and the sensor will effectively restore proper engine function while preventing further issues.
**Potential drawbacks are minimal** if purchased from a trusted source, and the benefits such as improved performance, fuel efficiency, and peace of mind far outweigh the risks. For most drivers, this is a **recommended upgrade** over OEM or lower-quality aftermarket options.
### **Recommendation**
- **Buy from a reputable seller** (e.g., Amazon, RockAuto, or a trusted local auto parts store) to avoid counterfeit products.
- **Follow proper installation steps**, including cleaning the sensor housing and ensuring a secure fit.
- **Monitor engine performance** post-installation to confirm the sensor is functioning correctly.
- **Consider pairing with a new thermostat** if the cooling system has been neglected, as a failing sensor often indicates other wear in the system.
For the majority of Fiat 500 owners, this sensor is a **smart, cost-effective solution** that delivers reliable performance.
Details:
Application specific for this vehicle. Placing an order outside the US is easy. Fits what vehicles: 2012 2019 Fiat 5 2014 2018 500L, 2016 2018 500X.
Updated 10.19.2023. Beck/Arnley parts meet foreign nameplate OE specifications for form, fit and function. Made to exacting tolerances for precise messaging the ECU. Original packaging.
All accessories hardware. Beck Arnley 158-1690 Coolant Temperature Sensor For 12-19 Fiat 500 500L 500X: Engine. FEATURES: Matches OE form, fit and function. Includes corrosion resistant terminals and coatings.
Constructed to withstand an engine environment.
part #: 1581690 prices
- $17.99-$71.98
specifications ocoosys:
- for models: 500x, 500
- for makes: Fiat
- for years: 2012-2019
- brand: Beck Arnley
- mpn: 158-1690
- part type: Sensor
- country of origin: Italy
general ocoosys:
- condition: New
- Car Truck Parts Accessories > Engine Cooling Components > Other Engine Cooling Components
payments ocoosys:
- wallet: Apple-pay
- other
- credit card: Visa
seller ocoosys:
- city: Salt Lake City, Utah
- # reviews: 168793
- rating: 99.6%
shipping ocoosys:
- transit: 4-7 Days
- class: Standard
- type: Fixed
- service: Standard
- cost: $0.00
offer ocoosys:
- availability: In Stock
- sold: 0
- quantity: 2
- started: May 8, 2026
- options: Ship-to-home
returns ocoosys:
- policy: Returns Accepted
- time: 30 Days
- paid by: Seller
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