CORTECO W0133-1905027-CFW Rear Crankshaft Seal

( Brand: Corteco ), ( Manufacturer Part Number: W0133-1905027-CFW ), ( Part Type: Seal Crankshaft ), ( Product Type: Engine ), ( California Prop 65 Warning: Cancer And Reproductive Harm ), ( Fitment Type: Direct Replacement ), ( Compatible Model S : X5, X3, Z4, X6, X1, X4, M2, 228i Xdrive, 228i, M235i Xdrive ), ( Fitnote: Enginedesignationname ), ( Product Subtype: Crankshafts ), ( Product Details: Engine Crankshaft Seal ), ( Department: Replacement )

Review CORTECO Bmw Rear Crankshaft Seal fits X5 2009–2018

The **Corteco W0133-1905027-CFW** is a high-performance, factory-replacement rear crankshaft seal designed specifically for BMW X5 models produced between 2009 and 2018, covering the E70 and F15 generations. Engineered to meet BMW s stringent engineering standards, this seal is crafted from a premium, oil-resistant synthetic rubber compound reinforced with a durable metal reinforcement ring, ensuring long-lasting durability and resistance to oil degradation, heat, and mechanical stress. The precision-molded design guarantees a perfect fit within the engine bay, eliminating leaks and maintaining optimal engine performance while reducing the risk of contamination from oil seepage. Unlike generic aftermarket alternatives, this seal incorporates Corteco s proprietary **CFW (Cold Flow Wax)** technology, which enhances flexibility in extreme temperatures whether under the harsh conditions of a cold winter start or the intense heat of a high-performance drive. This feature prevents cracking, warping, or premature failure, making it an ideal choice for both daily drivers and enthusiasts pushing their vehicles to their limits. Installation is straightforward, requiring only basic tools, and the seal s universal compatibility with the X5 s rear main bearing housing ensures a seamless replacement process without the need for modifications. Whether you re addressing a persistent oil leak, performing routine maintenance, or upgrading during a major service, the Corteco W0133-1905027-CFW provides a reliable, long-term solution that restores factory-like protection to your engine s critical sealing interface.

### **Pros and Cons of buying a CORTECO W0133-1905027-CFW Rear Crankshaft Seal for BMW X5 (2009 2018)**

1. **OEM-Quality Replacement** CORTECO is a well-regarded aftermarket brand that produces parts designed to meet or exceed OEM specifications. This ensures proper fitment, durability, and compatibility with your BMW s engine bay.

2. **Reliable Brand Reputation** CORTECO has a strong track record in the automotive aftermarket, particularly for high-quality seals, gaskets, and oil-related components. Many mechanics and BMW owners trust their products for critical repairs.

3. **Cost-Effective Alternative to OEM** While not an exact OEM part, CORTECO offers a significantly lower price than purchasing a genuine BMW seal, making it a practical choice for budget-conscious buyers without sacrificing quality.

4. **Ease of Installation** The seal is designed with standard dimensions, making it straightforward to install for DIYers with basic mechanical skills. It comes pre-lubricated, reducing friction during installation.

5. **Compatibility with Common Issues** The rear main seal is a common failure point in BMW N52, N54, and N57 engines (depending on the X5 s powertrain). CORTECO s seal is engineered to address oil leaks, which is a frequent concern in these models.

6. **Warranty and Support** CORTECO parts often come with a warranty (typically 12 24 months), providing peace of mind in case of premature failure. Their customer service is generally responsive for aftermarket brands.

7. **Prevents Engine Damage** A failing rear crankshaft seal can lead to oil leaks into the transmission or differential, causing long-term damage. Replacing it with a CORTECO seal helps prevent costly secondary issues.

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1. **Not a True OEM Part** While high-quality, CORTECO is not an original BMW part. Some purists or owners with strict OEM preferences may prefer genuine BMW seals, though the difference in quality is often negligible for most applications.

2. **Potential for Counterfeit Concerns** As with any aftermarket brand, there is a risk of purchasing a counterfeit or low-quality knockoff, especially if buying from untrusted sellers. Always verify the seller s reputation and product authenticity.

3. **Installation Challenges for Some** While the seal itself is easy to fit, the job often requires draining the transmission fluid, removing the flywheel, and accessing the crankshaft. This can be labor-intensive, especially for inexperienced DIYers, and may require additional tools (e.g., a seal puller or torque wrench).

4. **Limited Availability of Installation Guides** CORTECO does not always provide detailed installation manuals, so users may need to rely on third-party resources (e.g., YouTube tutorials or BMW forums) for guidance.

5. **Potential for Early Wear in Aggressive Driving Conditions** If the vehicle is frequently driven in extreme conditions (e.g., heavy towing, high RPMs, or extreme temperatures), the seal may wear faster than expected, though CORTECO seals are generally durable for normal use.

6. **Compatibility with Modified Engines** If the engine has been modified (e.g., forced induction, custom crankshafts), the seal may not fit perfectly or could require additional adjustments. Always confirm compatibility with your specific engine build.

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### **Conclusion and Recommendation**

The **CORTECO W0133-1905027-CFW rear crankshaft seal** is an excellent choice for BMW X5 owners (2009 2018) looking for a **high-quality, cost-effective replacement** for a failing OEM seal. It strikes a balance between affordability and performance, offering reliability comparable to many OEM parts without the premium price. The brand s reputation for durability and ease of installation makes it a **strongly recommended option** for both DIY enthusiasts and professional mechanics.

- **Buy from a trusted seller** (e.g., Amazon, RockAuto, or a reputable BMW parts dealer) to avoid counterfeit products.

- **Follow proper installation procedures**, including cleaning the crankshaft journal and using the correct lubricant (e.g., moly or seal-specific grease).

- **Consider professional installation** if you lack experience with transmission or engine bay work, as improper handling can lead to further damage.

- **Monitor for leaks** post-installation and address any issues promptly to ensure longevity.

For most BMW X5 owners, this seal will provide a **reliable, long-term solution** to rear crankshaft seal failures, preventing oil leaks and potential transmission damage. If budget is not a concern, an OEM seal is also a viable option, but CORTECO offers a compelling alternative for those prioritizing cost and quality.

Details:

Features: designed to deliver trouble-free, consistent performance. Made from high-quality materials for ultimate durability. Manufactured to meet or exceed strict quality requirements. Rear Crankshaft Seal W CFW by Corteco.

Right for your vehicle and lifestyle. This product is distinguished by total quality assurance, unsurpassed anybody else. Specifications: Size: 90 x 110 8mm.

part #: w01331905027 price

• $34.40

specifications cranshafengin:

• for makes: Bmw
• for years: 2009-2018
• brand: Corteco
• mpn: W0133-1905027-cfw
• part type: Seal Crankshaft
• product type: Engine
• california prop 65 warning: Cancer And Reproductive Harm
• fitment type: Direct Replacement
• compatible model s : X5, X3, Z4, X6, X1, X4, M2, 228i Xdrive, 228i, M235i Xdrive
• fitnote: Enginedesignationname
• product subtype: Crankshafts
• product details: Engine Crankshaft Seal
• department: Replacement

general cranshafengin:

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

payments cranshafengin:

• wallet: Apple-pay
• other
• credit card: Visa

seller cranshafengin:

• rating: 99.5%
• # reviews: 8572
• city: Shawnee, Kansas

shipping cranshafengin:

• class: Standard
• service: UPS Ground
• transit: 5-11 Days
• cost: $11.00
• type: Fixed
• carrier: UPS

offer cranshafengin:

• started: March 5, 2026
• options: Ship-to-home
• quantity: 5
• sold: 0
• availability: In Stock

returns cranshafengin:

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

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