1. Engine Crankshafts Products
  2. sku: 20461892154875853
  3. MAZDA K815ZFA4

MAZDA K815ZFA4 Gas Front Engine Motor Crankshaft 2.5L L4 9K

fits model: Touring, Fwd, Grand. make: Mazda. year: 2018–2021.

K815zfa4 Mazda 6 Grand Touring 18-21 Oem Fwd 2.5l L4 Gas Front Engine Motor Crankshaft 9k

( Manufacturer Part Number: K815ZFA4 ), ( Part Type: Engine Motor Crankshaft ), ( Items Included: Crankshaft ), ( Material: Steel ), ( Performance Part: No )

Review MAZDA Oem 2.5l L4 Gas Front Engine Motor Crankshaft 9k fits GRAND TOURING FWD 2018–2021

The **Mazda K815ZFA4** engine, a refined and versatile powerplant found in the **Touring models of Mazda vehicles (2018 2021, FWD)** with a **2.5-liter inline-four (L4) gasoline configuration**, represents a sophisticated blend of performance, efficiency, and reliability. This front-engine, front-wheel-drive (FWD) unit is a member of Mazda s **Skyactiv-G** family, a line of engines designed to deliver exceptional fuel economy, smooth operation, and responsive power without compromising on driving dynamics. The **9,000-mile service interval** (or roughly **9,000 kilometers**) underscores its durability, making it a practical choice for both daily commuters and weekend enthusiasts alike.

Under the hood, the **K815ZFA4** features a **naturally aspirated, direct-injection system** paired with **Skyactiv technology**, which includes precision-engineered pistons, valves, and combustion chambers optimized for improved thermal efficiency. The **2.5-liter displacement** strikes a balance between torque and power, producing approximately **184 horsepower (137 kW)** and **175 lb-ft (237 Nm) of torque**, figures that translate into a spirited yet manageable driving experience ideal for the Touring trim s blend of comfort and sportiness. The engine s **aluminum block and cylinder head**, along with a **forged crankshaft**, contribute to its lightweight yet robust construction, reducing rotational inertia for quicker throttle response and smoother revving characteristics.

One of the standout features of this engine is its **adaptive valve timing (Skyactiv-VT)**, which dynamically adjusts the intake and exhaust valve timing to optimize airflow at various RPM ranges. This not only enhances power delivery but also improves fuel economy by minimizing wasted energy. The **turbocharged variants** in Mazda s lineup are often praised for their punch, but the **naturally aspirated K815ZFA4** proves that forced induction isn t always necessary for excitement its linear power band and crisp mid-range acceleration make it a joy to drive, particularly in models like the **Mazda3 Touring or Mazda6 Touring**, where it pairs seamlessly with a **6-speed automatic transmission** (or manual in some markets).

Maintenance-wise, the **9,000-mile service interval** reflects Mazda s confidence in the engine s longevity, though regular oil changes (using **Skyactiv-G approved synthetic oil**) and adherence to the manufacturer s service schedule are key to preserving its performance. The **front-engine, front-wheel-drive layout** ensures a balanced weight distribution, contributing to the Touring models agile handling and comfortable ride quality. Whether cruising on highways or navigating twisty roads, the **K815ZFA4** delivers a harmonious blend of efficiency and engagement, embodying Mazda s commitment to **Skyactiv s "three magic circles"** performance, efficiency, and environmental consciousness.

For those seeking a **reliable, fuel-efficient, and engaging** engine without the complexity of turbocharging, the **Mazda K815ZFA4** stands as a compelling choice, offering a refined driving experience that aligns with Mazda s legacy of precision engineering and driver-centric design.

### **Pros and Cons of Buying a Mazda K815ZFA4 Touring (2018 2021, FWD, 2.5L L4 Gas, 9K Miles)**

#### **Pros:**

1. **Reliable Engine and Transmission**

The 2.5L Skyactiv-G 4-cylinder engine is known for its durability, good fuel efficiency (around 28 32 MPG combined), and smooth operation. Mazda s Skyactiv technology ensures strong torque and efficiency without excessive wear. The automatic transmission (likely a 6-speed) is generally robust, though some owners report minor delays in shifting.

2. **Low Maintenance Costs**

Mazda vehicles are often praised for their affordability in maintenance. The 2.5L engine has fewer issues compared to some competitors, and parts are relatively inexpensive. Routine services (oil changes, spark plugs, timing belt) are straightforward and cost-effective.

3. **Comfortable and Practical Interior**

The Touring trim offers a decently equipped cabin with decent materials, good visibility, and a comfortable ride. The rear seats fold flat for extra cargo space, making it practical for road trips or moving items. The infotainment system (if equipped with Sync 3) is user-friendly, though some models may have basic audio unless upgraded.

4. **Good Safety Features**

Most 2018 2021 Mazdas come with standard safety tech like stability control, traction control, and multiple airbags. Some trims include advanced safety packages (blind-spot monitoring, rear cross-traffic alert, etc.), which add value. The vehicle has a solid crash-test rating from the NHTSA.

5. **Fuel Efficiency**

With around 28 32 MPG in mixed driving, this car is more economical than many similar sedans or SUVs. The 2.5L engine avoids the thirst of larger V6s or turbocharged engines, making it cost-effective for daily commuting.

6. **Resale Value**

Mazdas hold their value reasonably well compared to some Japanese brands. A well-maintained example with low miles (like your 9K-mile candidate) should retain a decent resale price.

7. **Minimal Major Issues Reported**

Common problems with this model (if any) are usually minor, such as occasional electrical gremlins (e.g., infotainment glitches, sensor issues) or minor interior wear. The 2.5L engine is not prone to catastrophic failures like some turbocharged or older V6 engines.

---

#### **Cons:**

1. **Basic Interior Quality**

While functional, the Touring trim s interior materials are on the budget side plastic trim pieces, softer fabrics, and less premium finishes compared to higher trims. Some owners report squeaks or rattles over time, though these are common in many sedans.

2. **Limited Power for Some Drivers**

The 2.5L engine produces around 187 horsepower, which is adequate for city and highway driving but may feel underpowered for aggressive drivers or those used to more powerful cars. Acceleration from a stop can feel sluggish compared to turbocharged or V6 alternatives.

3. **Rear Seat Comfort**

The rear seats are narrow and less comfortable for taller passengers or extended periods. Legroom is adequate but not exceptional, and the seat padding may not be as supportive as in luxury sedans.

4. **Infotainment Limitations**

The base Sync 3 system is functional but lacks advanced features like wireless Apple CarPlay/Android Auto (unless upgraded). Some users report minor software glitches or slow response times.

5. **Rust Concerns (Depending on Region)**

If the car was driven in snowy or salted-road areas, check for rust around the wheel wells, undercarriage, and rocker panels. Rust can be a hidden issue that escalates over time if not addressed.

6. **Resale Depreciation**

While better than some brands, Mazdas still depreciate moderately. If you plan to sell it in a few years, the value may not recover as much as a luxury or high-demand vehicle.

7. **Potential Electrical Quirks**

Some owners report minor electrical issues, such as faulty sensors (e.g., oil pressure, temperature), intermittent power window malfunctions, or dashboard warning lights that turn on and off. These are usually fixable but can be annoying if they persist.

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### **Ending Conclusion:**

This **2018 2021 Mazda3 Touring (K815ZFA4, 2.5L FWD, 9K miles)** is a **solid, no-frills choice** for someone seeking a **reliable, fuel-efficient, and low-maintenance sedan**. It excels in practicality, affordability, and daily drivability, making it ideal for commuters, budget-conscious buyers, or those who prioritize simplicity over luxury.

**However**, if you expect **more power, premium interior quality, or advanced tech**, you may find alternatives (like a Mazda3 Sport or higher trim, or even a Honda Accord) more appealing. The Touring trim is best suited for buyers who value **durability, efficiency, and basic comfort** over extravagance.

---

### **Recommendation:** **Buy it if:**

- You need a **reliable, economical sedan** for daily use.

- You re okay with a **basic but functional interior** and **modest power**.

- You ve **verified its maintenance history** (oil changes, timing belt service, no rust issues).

- You plan to **keep it for 5 years** and don t mind its resale value limitations.

**Avoid it if:**

- You want **more power, luxury, or advanced tech** (consider a higher trim or a different model).

- You live in a **snowy/salty climate** and haven t confirmed rust-free condition.

- You re sensitive to **minor electrical quirks** or prefer a smoother ride (a CVT or AWD option might suit you better).

**Final Verdict:** **A great value for the price**, especially with low miles. Just ensure it s been **properly maintained** and inspect for any hidden issues before purchasing. If the price is right and the condition is good, it s a **safe and practical buy**.

Details:

Declared values of each package are according to the actual value that.

part #: k815zfa4 price

  • $299.00

specifications cranshafengin:

  • for models: Touring, Fwd, Grand
  • for makes: Mazda
  • for years: 2018-2021
  • mpn: K815zfa4
  • part type: Engine Motor Crankshaft
  • items included: Crankshaft
  • material: Steel
  • performance part: No

shipping cranshafengin:

  • service: UPS Ground
  • cost: $80.00
  • carrier: UPS
  • type: Fixed
  • transit: 3-9 Days
  • class: Standard

offer cranshafengin:

  • options: Ship-to-home
  • availability: In Stock
  • quantity: 1
  • best offers: True
  • sold: 0
  • started: May 20, 2026

general cranshafengin:

  • condition: Used
  • Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

returns cranshafengin:

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

seller cranshafengin:

  • city: Rancho Cordova, California
  • # reviews: 1082
  • rating: 99.3%

payments cranshafengin:

  • wallet: Apple-pay
  • credit card: Discover
  • other
for models: touring, fwd, grand, for makes: mazda, for years: 2018-2021, part type: engine motor crankshaft, items included: crankshaft, performance part: no,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, material: steel, sku: 20461892154875853,
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1 offer $299.00 USD
  • Used. Offer #1 priced at $299.00 + $80.00 shipping estimate = $379.00* total. DONOR CAR: 2021 MAZDA 6 GRAND TOURING FWD 2.5L L4 9K.+$80.00 shipping

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