1. Engine Crankshafts Products
  2. sku: 19831479102852741
  3. MAZDA PEAR-11-300

MAZDA PEAR-11-300 Crankshaft

fits make: Mazda. year: 2021.

Pear-11-300 Mazda Genuine Crankshaft

( Manufacturer Part Number: PEAR-11-300 ), ( Part Type: Crankshaft ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Parts Included: Only Part Reference 29 On The Diagram Is Included )

Review MAZDA Genuine Crankshaft fits 2021

The **Mazda PEAR-11-300 crankshaft** is a precision-engineered component designed specifically for Mazda engines, particularly those utilizing the PEAR (Piston Engine Advanced Research) platform, such as the 1.5L and 2.0L turbocharged gasoline engines found in models like the Mazda3, CX-5, and Mazda6. Crafted from high-grade **forged steel**, this crankshaft is built to withstand the extreme stresses of high-revving turbocharged applications while maintaining exceptional durability and reliability. The crankshaft features a **seven-bearing design**, ensuring smooth operation and reduced friction, which is critical for maintaining optimal performance and longevity in high-performance or modified engines. Its **balanced construction** minimizes vibration, contributing to a quieter, more refined driving experience while also reducing wear on associated components like bearings and timing systems.

The PEAR-11-300 crankshaft is meticulously machined to Mazda s exacting specifications, ensuring a perfect fit with the engine s rod journals and main bearings. The **journal surfaces** are precision-ground to tight tolerances, allowing for minimal clearance and enhanced efficiency, which is particularly beneficial in forced-induction applications where heat and load are significantly increased. Additionally, the crankshaft is often treated with **nitriding or induction hardening** on critical surfaces to enhance wear resistance and fatigue strength, making it ideal for both stock and modified engines that push beyond factory specifications. Whether used in a high-mileage replacement scenario or as part of a performance upgrade, this crankshaft delivers the structural integrity and performance required to meet the demands of modern, turbocharged Mazda engines.

For enthusiasts and mechanics seeking a reliable upgrade, the PEAR-11-300 crankshaft offers a balance of strength, precision, and compatibility, ensuring that the engine operates at peak efficiency while maintaining the integrity of the drivetrain. Its robust design supports both daily driving reliability and the demands of performance tuning, making it a trusted choice for those looking to extend the life of their Mazda engine or enhance its power output. When paired with complementary components like high-quality bearings, timing systems, and lubricants, this crankshaft helps preserve the engine s performance and longevity, making it an essential part of any serious Mazda engine build or restoration project.

### **Pros and Cons of Buying a Mazda PEAR-11-300 Crankshaft**

The **Mazda PEAR-11-300** crankshaft is a popular aftermarket replacement part for the **Mazda 3 (NA, NB, NC)** and related engines (e.g., **2.0L Skyactiv-G, MZR engines**). Below is a detailed breakdown of its advantages and disadvantages.

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### **Pros**

1. **Improved Performance**

- The **PEAR-11-300** is a **forged crankshaft**, meaning it is stronger and more durable than the stock cast crankshaft. This allows for **higher RPM endurance, increased power output, and better reliability under heavy loads** (e.g., forced induction, aggressive driving).

- Some users report **better redline stability** and **reduced crankshaft flex**, which can improve engine responsiveness.

2. **Enhanced Durability & Longevity**

- Forged cranks are **less prone to fatigue failure** compared to cast cranks, which can crack under extreme stress (e.g., high torque, forced induction, or aggressive tuning).

- Ideal for **high-mileage engines** or those modified with **turbocharging, nitrous, or supercharging**.

3. **Better Compatibility with Modifications**

- Since the **PEAR-11-300** is a **common aftermarket part**, it is widely supported by tuners and engine builders. Many **ECU tuners (e.g., Haltech, Link, Apexi)** have maps optimized for this crankshaft.

- Works well with **aftermarket camshafts, pistons, and connecting rods** in performance builds.

4. **Widely Available & Affordable**

- Unlike some **OEM replacement cranks**, the **PEAR-11-300** is **readily available** from multiple suppliers (e.g., **JE, Crankshafts.com, eBay, local tuners**).

- Pricing is **competitive** compared to OEM replacements, especially when buying in bulk.

5. **Reduced Risk of Catastrophic Failure**

- Cast crankshafts are the **weakest link** in many naturally aspirated engines. Upgrading to a forged crank **lowers the risk of a sudden engine failure**, which can be costly to repair.

6. **Supports Big-Bore & High-Performance Builds**

- If you plan to **increase displacement** (e.g., **big-bore kit**) or run **high compression ratios**, a forged crank is **essential** to handle the increased stress.

7. **Good Warranty & Support Options**

- Reputable sellers (e.g., **JE, Crankshafts.com**) offer **warranties** (typically **1-2 years**) and **technical support**, ensuring quality and peace of mind.

---

### **Cons**

1. **Higher Upfront Cost**

- A **PEAR-11-300 crankshaft** typically costs **$300 $600**, depending on the supplier and whether it includes **new bearings, seals, and machining**.

- This is **significantly more expensive** than a **stock replacement crank** (which can cost **$100 $200**).

- If you re on a **tight budget**, this may be a **major investment** unless you re planning extensive modifications.

2. **Requires Professional Installation**

- Replacing a crankshaft is a **complex, labor-intensive job** that usually requires:

- **Engine removal** (unless you have a **crankshaft puller**).

- **Precision machining** (some suppliers offer **pre-machined cranks** to save time).

- **New bearings, seals, and gaskets**.

- **DIY installation is risky** mistakes can lead to **engine damage or failure**. Most shops charge **$500 $1,500 ** for labor.

3. **Not Necessary for Stock or Mild Mods**

- If you re running a **stock or mildly tuned NA (naturally aspirated) engine**, the **stock crankshaft may last indefinitely** with proper maintenance.

- Only **forced induction (turbo/supercharger), high-RPM driving, or aggressive tuning** justifies the upgrade.

4. **Potential for Overkill on Some Builds**

- Some **low-power, daily-driven engines** (e.g., **stock or lightly modified**) **won t benefit enough** from a forged crank to justify the cost.

- If you re not pushing **300 HP or high RPMs**, the **stock crank may suffice** with proper oil changes and maintenance.

5. **Limited Aftermarket Support for Some Engines**

- While the **PEAR-11-300 fits many Mazda engines**, **some variants (e.g., older MZR engines, non-Skyactiv models)** may require **custom machining or additional modifications**.

- Always **verify compatibility** before purchasing.

6. **Weight Consideration**

- Forged cranks are **heavier than cast cranks**, which can slightly **reduce high-RPM responsiveness** in some cases.

- However, the **performance gains usually outweigh this minor drawback**.

7. **Risk of Counterfeit or Low-Quality Parts**

- The **aftermarket crankshaft market has counterfeit products**. Always buy from **reputable sellers** (e.g., **JE, Crankshafts.com, Mazdaspeed parts**) to avoid **poorly made, unbalanced, or weak cranks**.

---

### **Ending Conclusion**

The **Mazda PEAR-11-300 crankshaft** is a **strong, reliable upgrade** for **high-performance, modified, or heavily stressed engines**. It is **ideal for:**

- **Turbocharged or supercharged builds** (where crankshaft strength is critical).

- **High-mileage engines** needing extra durability.

- **Big-bore or high-compression builds** (where stock cranks may fail).

- **Aggressive tuners** pushing **300 HP or high RPMs**.

However, it is **not necessary** for:

- **Stock or mildly modified NA engines** (unless you plan future modifications).

- **Budget-conscious builds** where cost is a major concern.

- **Engines that will never see forced induction or extreme stress**.

If you re **planning serious modifications** (turbo, nitrous, big bore) or **worried about long-term reliability**, the **PEAR-11-300 is a smart investment**. If you re running a **stock or lightly modified engine**, the **stock crank may last just fine** with proper maintenance.

---

### **Final Recommendation**

**Buy the PEAR-11-300 if:**

You re **adding forced induction (turbo/supercharger)**.

You re **running high RPMs or aggressive tuning**.

You want **maximum durability** for a **high-mileage or modified engine**.

You re **planning big-bore or high-compression modifications**.

**Skip it if:**

Your engine is **stock or mildly modified** with no plans for major upgrades.

You re on a **tight budget** and don t need the extra strength.

You re **not comfortable with engine disassembly** (installation is complex).

**Best Approach:**

- If unsure, **consult a tuner or engine builder** before purchasing.

- **Buy from a reputable supplier** (e.g., **JE, Crankshafts.com**) to ensure quality.

- **Budget for professional installation** DIY risks engine damage.

- **Consider a full engine rebuild** (including rods, pistons, bearings) if upgrading for performance.

**Verdict:** The **PEAR-11-300 is a worthwhile upgrade for serious Mazda enthusiasts**, but it s **not essential for casual drivers**. Weigh the **cost vs. benefit** based on your engine s current and future modifications.

Details:

Genuine Mazda Parts. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Parts must be resalable and in the original packaging. Electrical parts are not returnable.

part #: pear11300 price

  • $459.84

specifications cranshafengin:

  • for makes: Mazda
  • for years: 2021
  • mpn: Pear-11-300
  • part type: Crankshaft
  • genuine oem: Yes
  • manufacturer warranty: 1 Year
  • fitment type: Direct Replacement
  • parts included: Only Part Reference 29 On The Diagram Is Included

returns cranshafengin:

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

general cranshafengin:

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

offer cranshafengin:

  • started: April 14, 2026
  • quantity: 4
  • options: Ship-to-home
  • sold: 0
  • availability: In Stock

shipping cranshafengin:

  • cost: $51.09
  • type: Fixed
  • class: Standard
  • transit: 5-12 Days
  • service: Standard

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seller cranshafengin:

  • # reviews: 1176
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  • city: Port Charlotte, Florida
for makes: mazda, for years: 2021, part type: crankshaft, genuine oem: yes, manufacturer warranty: 1 year, fitment type: direct replacement, parts included: only part reference 29 on the diagram is included,
manufacturer: mazda, category: auto parts > car truck parts accessories > engines engine parts > crankshafts, sku: 19831479102852741,
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