MAZDA PE01-11-312 Engine Crankshaft Rear Oil Seal MAZDA3

( Manufacturer Part Number: PE01-11-312 ), ( Part Type: Oil Seal Engine Crankshaft ), ( Fitment Type: Direct Replacement ), ( Items Included: Seal ), ( Modle: M3, Cx-3, Cx-5, Mx-5 Miata ), ( Product Type: Genuine Parts ), ( Material: Rubber ), ( Vintage Part: No ), ( Manufacturer Warranty: 6 Months ), ( Country Of Origin: Japan ), ( Engine: 2.0l )

Review MAZDA Oem Mazda3 Engine Crankshaft Rear Oil Seal fits CX-3 CX-5 MX-5 2012–2024

The **Mazda PE01-11-312 Engine Crankshaft Rear Oil Seal** is a precision-engineered component designed exclusively for Mazda s lineup of performance-driven vehicles, including the **2012 2024 Mazda3, CX-3, CX-5, and MX-5 (Miata)** models equipped with the **2.0L or 2.5L Skyactiv-G or MZR engines**. This high-quality oil seal is crafted to maintain optimal engine integrity by preventing oil leakage from the rear main housing, ensuring long-term reliability and minimizing the risk of costly internal damage. Engineered from durable **nitrile rubber (NBR) with a reinforced steel or composite backing**, this seal is engineered to withstand the extreme pressures and temperatures generated by Mazda s advanced combustion systems, including those with direct fuel injection and turbocharging in later model years. Its tight, interference-fit design guarantees a secure seal against the crankshaft, reducing friction while maintaining a leak-proof barrier that protects critical engine components from contamination. Whether addressing a naturally occurring wear-and-tear issue or replacing a seal compromised by overdue maintenance, this OE-quality replacement ensures a perfect fit with minimal clearance, restoring engine efficiency and extending the lifespan of the crankshaft and surrounding components. Ideal for both professional mechanics and DIY enthusiasts, this seal is a critical upgrade for maintaining the performance and longevity of Mazda s compact yet high-performance powertrains.

### **Pros and Cons of buying a Mazda PE01-11-312 Engine Crankshaft Rear Oil Seal (2012 2024 Mazda3, CX-3, CX-5, MX-5)**

1. **Direct OEM Fitment** This part is designed specifically for Mazda engines, ensuring compatibility without modifications. It matches the original equipment manufacturer (OEM) specifications, reducing the risk of improper fitment issues.

2. **High-Quality Material** Reputable manufacturers use durable materials like nitrile or silicone rubber, reinforced with metal or fiber for longevity, especially in high-performance or turbocharged applications.

3. **Prevents Oil Leaks** A failing rear main seal can cause oil leaks into the crankcase or onto the timing chain/balancer, leading to oil contamination and potential engine damage. Replacing it proactively avoids costly repairs.

4. **Compatibility with Aftermarket Upgrades** If you ve modified your engine (e.g., turbocharging, forced induction), a high-quality seal ensures it can handle increased stress without premature failure.

5. **Ease of Installation** While some seals require special tools (e.g., seal drivers, torque wrenches), this part is designed for straightforward replacement, especially if you re experienced with basic engine work.

6. **Warranty Coverage** Many reputable sellers offer warranties (e.g., 1 2 years), providing peace of mind against early failure due to defects.

7. **Cost-Effective Long-Term Solution** Replacing a seal early prevents secondary damage (e.g., contaminated oil, timing chain wear) that could escalate repair costs.

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1. **Labor-Intensive Replacement** Removing and reinstalling the crankshaft rear seal often requires disassembling parts of the engine (e.g., oil pan, timing cover, or balancer), which can be time-consuming for DIYers without mechanical experience.

2. **Specialized Tools May Be Needed** Some seals require tools like a seal installer, torque wrench, or even a seal driver to avoid damaging the seal or crankshaft. Rental or purchase of these tools adds to the cost.

3. **Potential for Improper Installation** If not installed correctly (e.g., seal not seated properly, over-torqued bolts), it can lead to leaks or premature failure. This risk is higher for inexperienced DIYers.

4. **Cost of Additional Parts** Depending on the vehicle, you may need to replace gaskets (e.g., oil pan, timing cover) or bolts during the process, increasing the total expense.

5. **Risk of Contamination During Removal** If oil leaks during disassembly, it can contaminate the crankshaft or surrounding components, requiring extra cleaning or replacement.

6. **Not a Permanent Fix for Underlying Issues** If the seal fails due to a larger problem (e.g., worn crankshaft journals, poor lubrication), replacing just the seal won t solve the root cause.

7. **Limited Availability of OEM Parts** While aftermarket seals are widely available, genuine OEM seals may be harder to source and more expensive, though they often offer better longevity.

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Buying the **Mazda PE01-11-312 crankshaft rear oil seal** is a **smart investment** if you re experiencing or anticipating oil leaks, especially in high-mileage or modified engines. The benefits such as preventing catastrophic engine damage, ensuring OEM fitment, and long-term reliability outweigh the drawbacks for most owners. However, the **labor-intensive installation** and **potential for mistakes** make it a better fit for **experienced DIYers or professional mechanics**.

If you re unsure about the installation process, **consulting a mechanic** or **watching detailed step-by-step guides** (e.g., from Mazda forums or YouTube) is advisable. For those comfortable with engine work, this part is a **cost-effective way to avoid expensive repairs down the line**.

- **Buy from a reputable seller** (e.g., RockAuto, Amazon, or Mazda-approved suppliers) with a warranty.

- **Verify compatibility** with your exact model year and engine variant (e.g., 2.0L or 2.5L Skyactiv-G).

- **Prepare for the job** by gathering tools (seal installer, torque wrench, gasket scraper) and spare gaskets if needed.

- **Consider professional installation** if you lack confidence in your mechanical skills to avoid costly mistakes.

- **Monitor oil levels and leaks** post-installation to ensure the seal is functioning correctly.

For most Mazda owners, **this is a worthwhile upgrade** especially if you ve noticed oil leaks or are planning engine modifications. The long-term savings on engine damage far outweigh the upfront cost.

Details:

OEM 2012 2024 Mazda3 CX-3 CX-5 MX-5 Engine Crankshaft Rear Oil Seal PE01-11-312.

part #: pe0111312 prices

• $32.42-$69.00

specifications cranshafengin:

• for models: Cx-3, Cx-5, Mx-5
• for makes: Mazda
• for years: 2012-2024
• mpn: Pe01-11-312
• part type: Oil Seal Engine Crankshaft
• fitment type: Direct Replacement
• items included: Seal
• modle: M3, Cx-3, Cx-5, Mx-5 Miata
• product type: Genuine Parts
• material: Rubber
• vintage part: No
• manufacturer warranty: 6 Months
• country of origin: Japan
• engine: 2.0l

offer cranshafengin:

• sold: 0
• started: March 2, 2026
• availability: In Stock
• quantity: 1
• options: Ship-to-home

seller cranshafengin:

• rating: 100.0%
• # reviews: 1222
• city: Wilmington, North Carolina

returns cranshafengin:

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

general cranshafengin:

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

payments cranshafengin:

• wallet: Google-pay
• other
• credit card: Diners-club

shipping cranshafengin:

• carrier: USPS
• service: USPS Ground Advantage
• transit: 9-12 Days
• class: Standard
• cost: $0.00
• type: Calculated

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