1. Engine Crankshafts Products
  2. sku: 18602634299860891
  3. HYUNDAI SMITLEY-387-04-129

HYUNDAI SMITLEY-387-04-129 Crankshaft Position Sensor 1.8L

fits model: Elantra. make: Hyundai. year: 2012.

Smitley-387-04-129 Hyundai 2012 Elantra Crankshaft Position Sensor 1.8l

( Manufacturer Part Number: SMITLEY-387-04-129 ), ( Part Type: Crankshaft Sensor )

Review HYUNDAI Crankshaft Position Sensor 1.8l fits ELANTRA 2012

The **Hyundai Smitley-387-04-129 Crankshaft Position Sensor (CPS) for the 2012 Hyundai Elantra 1.8L engine** is a precision-engineered, high-performance automotive sensor designed to ensure optimal engine operation and reliability. This direct-fit replacement part is meticulously crafted to meet or exceed Hyundai s original equipment specifications, guaranteeing seamless compatibility with the 1.8L GDI (Gasoline Direct Injection) engine found in the 2012 Elantra model. The crankshaft position sensor plays a critical role in the vehicle s engine management system by monitoring the rotational speed and position of the crankshaft, providing essential data to the engine control unit (ECU) to regulate fuel injection, ignition timing, and overall engine performance. Constructed from durable materials, including a robust housing and a high-quality magnetic pickup, this sensor is engineered to withstand the demanding conditions of daily driving, including exposure to heat, vibration, and moisture. Its precise magnetic field detection ensures accurate crankshaft position readings, helping to maintain smooth engine operation, prevent misfires, and reduce emissions. Whether replacing a worn-out or faulty original sensor or upgrading for enhanced performance, this aftermarket sensor delivers the reliability and precision needed to keep your 2012 Hyundai Elantra running at its best. Backed by rigorous quality testing and designed for long-term durability, it is an ideal choice for both professional mechanics and DIY enthusiasts seeking a dependable, cost-effective solution.

### **Pros and Cons of buying a Hyundai/Smiley 387-04-129 (2012 Elantra 1.8L Crankshaft Position Sensor)**

#### **Pros:**

1. **Compatibility** This part is specifically designed for the 2012 Hyundai Elantra with a 1.8L engine, ensuring a proper fit and function without modifications.

2. **OEM Quality** Hyundai s original equipment manufacturer (OEM) parts are built to meet the same standards as factory components, reducing the risk of premature failure.

3. **Reliability** The crankshaft position sensor is a critical component for engine performance, fuel injection, and ignition timing. A high-quality sensor minimizes engine misfires, rough idling, and potential long-term damage.

4. **Warranty Coverage** Hyundai parts often come with a warranty (typically 12 60 months), providing peace of mind against defects.

5. **Ease of Installation** Since it s an OEM part, it should align seamlessly with the vehicle s wiring and mounting points, reducing installation complexity.

6. **Prevents Costly Repairs** A failing crankshaft sensor can lead to severe engine damage (e.g., bent valves, piston damage) if the engine runs without proper timing signals. Replacing it early avoids expensive repairs.

7. **Aftermarket vs. OEM Advantage** While aftermarket sensors may be cheaper, OEM parts are less likely to cause compatibility issues or require additional tuning.

#### **Cons:**

1. **Higher Cost** OEM parts are generally more expensive than aftermarket alternatives, which may be a concern for budget-conscious buyers.

2. **Potential Overkill** If the sensor failure is minor (e.g., a loose connection or minor wear), a cheaper aftermarket sensor might suffice without sacrificing performance.

3. **Availability Issues** Depending on location, OEM parts may not be as readily available as aftermarket options, requiring online ordering or special ordering from a Hyundai dealer.

4. **No Additional Features** Unlike some aftermarket sensors, this OEM part does not include extra diagnostic tools or enhanced durability features that some third-party brands offer.

5. **Dealer vs. Independent Mechanic Pricing** Purchasing from a Hyundai dealer may inflate the price compared to buying from an auto parts store or online retailer.

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### **Ending Conclusion:**

The **Hyundai/Smiley 387-04-129 crankshaft position sensor for the 2012 Elantra 1.8L** is a reliable, high-quality choice that ensures proper engine function and prevents costly damage. While it may cost more than aftermarket alternatives, the trade-off in reliability, warranty coverage, and compatibility makes it the best option for most drivers. If budget is a major concern, a **high-quality aftermarket sensor (e.g., Denso, Bosch, or ACDelco)** could be a reasonable alternative, provided it is specifically listed as compatible with your vehicle.

### **Recommendation:** - **Buy the OEM sensor (387-04-129) if:**

- You prioritize long-term reliability and warranty protection.

- You want to avoid any risk of compatibility issues.

- You re replacing the sensor due to a confirmed failure (e.g., error codes, mechanical issues).

- **Consider a high-end aftermarket sensor (e.g., Denso 45309-01001 or Bosch 0 261 231 001) if:**

- You re on a tight budget but still want a durable, reliable part.

- You ve verified the sensor is the root cause of the issue (check for loose connections or wiring problems first).

- **Before purchasing, verify:**

- The exact sensor number matches your vehicle s requirements (some 1.8L Elantras use slightly different sensors).

- The sensor is not damaged by debris, corrosion, or improper installation in the past.

- No other underlying issues (e.g., fuel injectors, ignition coils, or wiring) are contributing to the problem.

For most cases, the **OEM sensor is the safest and most recommended choice** to ensure optimal engine performance and longevity.

Details:

Notes of the part or noticeable wear -, SCUFFS, DIRTY. View other parts from this vehicle. Vehicle Year: 2012. Vehicle model: Elantra.

Vehicle Make: Hyundai. View other parts for this year make and model.

part #: smitley38704129 price

  • $26.99

specifications cranshafengin:

  • for models: Elantra
  • for makes: Hyundai
  • for years: 2012
  • mpn: Smitley-387-04-129
  • part type: Crankshaft Sensor

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  • quantity: 1
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  • started: January 31, 2026
  • options: Ship-to-home
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  • Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

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for models: elantra, for makes: hyundai, for years: 2012, part type: crankshaft sensor,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, sku: 18602634299860891,
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