FEL-PRO BS-40686 Rear Crankshaft Seal Kit 614046842250 Bs

( Brand: Fel-pro ), ( Manufacturer Part Number: BS-40686 ), ( Part Type: Seal Crankshaft ), ( Product Type: Engine ), ( UPC: 614046842250 ), ( Fitment Type: Direct Replacement ), ( Partslink Number: 90311a0006, 9031199010 ), ( Compatible Model S : Tacoma, Tundra, 4runner, Fj Cruiser ), ( Product Subtype: Crankshafts ), ( Placement On Vehicle: Rear ), ( Product Details: Engine Crankshaft Seal ), ( Department: Replacement )

Review FEL PRO Toyota Bs 40686 Rear Crankshaft Seal Kit fits TACOMA 2005–2015

The **Fel-Pro BS-40686 Rear Crankshaft Seal Kit** is a premium, high-performance replacement solution specifically engineered for Toyota Tacoma models produced between 2005 and 2015, ensuring a reliable and long-lasting seal for the rear main crankshaft. Designed with Fel-Pro s signature precision and quality, this kit delivers superior durability and leak resistance, addressing common issues such as oil leaks, crankshaft misalignment, or wear that can compromise engine integrity over time. Crafted from high-grade materials, including a reinforced rubber seal and a robust metal backing plate, this kit is built to withstand the demanding conditions of heavy-duty applications, whether your Tacoma is used for off-roading, towing, or daily commuting. The kit includes all necessary components such as the crankshaft seal itself, a new gasket, and often a specialized tool for proper installation to simplify the replacement process while ensuring a tight, airtight fit. Fel-Pro s commitment to engineering excellence means this seal is engineered to minimize friction, reduce oil consumption, and extend the lifespan of your engine s critical components. Whether you re performing routine maintenance or addressing a persistent leak, the BS-40686 kit provides a trusted, long-term solution that aligns with Toyota s performance standards while offering enhanced reliability for your vehicle s drivetrain.

The **Fel-Pro BS-40686 Rear Crankshaft Seal Kit** is a popular choice for replacing the rear main seal (RMS) on Toyota Tacoma models from 2005 to 2015. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Fel-Pro BS-40686 Rear Crankshaft Seal Kit**

1. **High-Quality Materials** Fel-Pro is known for using durable, high-performance materials that resist oil leaks and wear better than many aftermarket alternatives. The seal is designed to withstand the heat and pressure generated by the engine, reducing the risk of premature failure.

2. **Proper Fitment** This kit is specifically engineered for Toyota Tacoma engines (4-cylinder and V6) from 2005 to 2015. Fel-Pro ensures accurate sizing and compatibility, minimizing the risk of installation errors that could lead to leaks.

3. **Easy Installation** The kit includes all necessary components (seal, gasket, and sometimes a new oil pump seal or thrust washer) and is designed for straightforward installation. Many users report that it fits without requiring extensive modifications to the engine or crankshaft.

4. **Reliability** Fel-Pro is a trusted brand in the automotive aftermarket, and this particular seal has a strong reputation for longevity. Many owners report that it lasts the life of the engine when installed correctly, reducing the need for future replacements.

5. **Warranty Support** Fel-Pro offers a warranty on its products, providing some peace of mind in case of manufacturing defects or premature failure.

6. **Prevents Oil Leaks** One of the most common issues with rear main seals is oil leakage, which can contaminate the transmission fluid and damage the transmission over time. This kit is designed to seal effectively, reducing the risk of such leaks.

7. **Compatibility with Common Modifications** Since the Tacoma is a popular truck, many owners have modified their engines (e.g., turbocharging, forced induction). Fel-Pro s seal is often recommended for these applications because it can handle increased stress.

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### **Cons of the Fel-Pro BS-40686 Rear Crankshaft Seal Kit**

1. **Cost** While not excessively expensive, this is a premium-quality seal, and the price may be higher than some generic or budget aftermarket options. For DIYers on a tight budget, this could be a drawback.

2. **Requires Professional Installation for Best Results** While the kit is designed for easy installation, achieving a perfect seal especially on a used or worn crankshaft can be challenging. Improper installation (e.g., uneven seating, incorrect torque) can lead to leaks. Some users may need to consult a mechanic for optimal results.

3. **Limited Availability of Replacement Parts** If the seal fails prematurely (though rare with Fel-Pro), finding an exact replacement may be difficult compared to more common OEM or aftermarket brands.

4. **Potential for Crankshaft Damage** If the old seal was leaking for an extended period, oil may have contaminated the crankshaft bearings or thrust surfaces. In such cases, additional repairs (e.g., bearing replacement) may be necessary, which are not included in this kit.

5. **Time-Consuming Installation** Replacing a rear main seal requires removing the transmission, which is a labor-intensive process. This kit does not reduce the time required for the job only the quality of the seal itself.

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### **Conclusion**

The **Fel-Pro BS-40686 Rear Crankshaft Seal Kit** is one of the best aftermarket options for Toyota Tacoma owners addressing rear main seal failure. Its superior materials, precise fitment, and reliability make it a strong choice for those prioritizing long-term performance and leak prevention. However, the cost and the complexity of installation (which may require professional help) are factors to consider.

If you are experiencing oil leaks from the rear main seal, this kit is an excellent investment to prevent further damage to the transmission and ensure a proper seal. For those comfortable with mechanical work, it can be installed at home with careful attention to detail. If in doubt about installation quality, consulting a trusted mechanic is advisable.

### **Recommendation**

For Toyota Tacoma owners (2005 2015) needing a reliable rear main seal replacement, the **Fel-Pro BS-40686 kit is highly recommended**. It strikes a balance between quality, durability, and ease of use, making it a top-tier choice in the aftermarket. If budget is a concern, compare it with other high-quality brands like **Sealmaster or Gates**, but Fel-Pro remains a safe and proven option. Always ensure the crankshaft and surrounding components are in good condition before installation to maximize the seal s lifespan.

Details:

Validated for fit, form, and function. Rear Crankshaft Seal Kit BS 40686 by Fel-Pro. This premium Product is the best way to go for those looking highest quality replacement that offers supreme levels of quality, performance and reliability. Features: Application specific design to ensure a perfect fit.

Unsurpassed quality you can trust. Replaces Original OE Part #: 90311A0006. Engineered and manufactured specifically for repair applications. Meets or exceeds all original equipment specifications.

part #: bs40686 prices

• $19.79-$37.25

specifications cranshafengin:

• for models: Tacoma
• for makes: Toyota
• for years: 2005-2015
• brand: Fel-pro
• mpn: Bs-40686
• part type: Seal Crankshaft
• product type: Engine
• upc: 614046842250
• fitment type: Direct Replacement
• partslink number: 90311a0006, 9031199010
• compatible model s : Tacoma, Tundra, 4runner, Fj Cruiser
• product subtype: Crankshafts
• placement on vehicle: Rear
• product details: Engine Crankshaft Seal
• department: Replacement

payments cranshafengin:

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

shipping cranshafengin:

• class: Standard
• type: Calculated
• cost: $18.99
• carrier: FedEx
• transit: 4-9 Days
• service: FedEx Ground / FedEx Home Delivery

seller cranshafengin:

• city: Fort Smith, Arkansas
• # reviews: 152308
• rating: 99.0%

offer cranshafengin:

• started: March 21, 2026
• availability: In Stock
• options: Ship-to-home
• quantity: 5
• sold: 0

general cranshafengin:

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

returns cranshafengin:

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

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