FEL-PRO TCS-45903 Front Crankshaft Seal Kit 084113651786 Tcs

( Brand: Fel-pro ), ( Manufacturer Part Number: TCS-45903 ), ( Part Type: Seal Crankshaft ), ( Product Type: Engine ), ( UPC: 084113651786 ), ( Fitment Type: Direct Replacement ), ( Compatible Make S : Nissan, Infiniti ), ( Compatible Model S : Altima, Sentra, 240sx, 200sx, G20 ), ( Product Subtype: Crankshafts ), ( Placement On Vehicle: Front ), ( Product Details: Engine Crankshaft Seal ), ( Engine Version: Nissan Sr20 ), ( Department: Replacement )

Review FEL PRO Nissan Tcs 45903 Front Crankshaft Seal Kit fits ALTIMA 1993–2001

The **Fel-Pro TCS 45903 Front Crankshaft Seal Kit** is a premium, high-performance replacement solution specifically engineered to restore sealing integrity and prevent costly engine damage in **Nissan Altima models manufactured between 1993 and 2001**. Designed to address the critical function of the front crankshaft seal, this kit ensures a reliable barrier against oil leaks, contamination, and premature wear common issues that plague older engines prone to oil seepage or misalignment. Crafted from **high-quality, reinforced elastomers and precision-molded materials**, the Fel-Pro seal is engineered to withstand the demanding conditions of high-pressure oil systems, extreme temperatures, and the mechanical stresses of engine operation. The kit includes a **newly machined front cover gasket**, a **high-performance crankshaft seal with a robust lip design**, and **compatible hardware** to guarantee a seamless installation process. Unlike generic or aftermarket alternatives, Fel-Pro s **Thermally Conductive Sealant (TCS)** technology enhances durability, reducing the risk of premature failure and ensuring a tight, long-lasting seal that resists oil leakage and environmental contaminants. Whether addressing a persistent oil leak, preparing for a major engine service, or upgrading an aging engine for improved reliability, this kit delivers the **precision, performance, and longevity** expected from a trusted name in automotive aftermarket solutions. Built to meet or exceed OEM specifications, the **TCS 45903** is an essential upgrade for Nissan Altima owners seeking to extend engine life, prevent catastrophic oil leaks, and maintain peak mechanical efficiency.

### **Pros and Cons of buying a Fel-Pro TCS-45903 Front Crankshaft Seal Kit for a 1993-2001 Nissan Altima**

1. **High-Quality Materials** Fel-Pro is a well-regarded brand known for durable, long-lasting seals made from high-grade rubber and reinforced components. This reduces the likelihood of premature failure compared to cheaper aftermarket alternatives.

2. **Proper Fitment** The TCS-45903 is specifically designed for the 1993-2001 Nissan Altima s front crankshaft seal application, ensuring an accurate fit without gaps or misalignment that could lead to leaks or damage.

3. **Ease of Installation** Fel-Pro kits typically include clear instructions and sometimes tool-specific components (like a seal installer or pilot bearing) to simplify the replacement process. This can help prevent mistakes that might occur with generic or poorly packaged seals.

4. **Compatibility with Common Issues** The front crankshaft seal in older Altimas is prone to leaking oil due to wear, heat, or improper installation. A quality seal like this one can effectively address that issue, restoring proper engine sealing and preventing oil leaks onto the timing belt or into the transmission.

5. **Warranty and Reliability** Fel-Pro offers warranties on its products, providing some assurance that the seal will perform as expected. Many users report that Fel-Pro seals last significantly longer than OEM or budget alternatives.

6. **Prevents Further Damage** A failing crankshaft seal can allow oil to contaminate the timing belt, leading to premature wear or failure. Replacing it with a reliable seal helps avoid costly timing belt or water pump replacements down the line.

7. **Positive User Feedback** Many reviews from owners of similar vehicles praise Fel-Pro for its durability and performance, suggesting it s a trusted choice for this application.

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1. **Higher Upfront Cost** Fel-Pro seals are more expensive than generic or no-name brands. While the price difference is often justified by quality, it may be a concern for budget-conscious buyers.

2. **Requires Professional Installation (Recommended)** While the kit is designed for easier DIY replacement, improper installation such as not properly seating the seal or damaging the crankshaft flange can lead to leaks or seal failure. If the installer lacks experience, the seal may not last as long as expected.

3. **Additional Labor Costs** If hiring a mechanic, the labor cost for replacing a front crankshaft seal can be significant (often $150 $300 depending on the shop). This adds to the overall expense, even with a quality seal.

4. **Potential for Overkill** If the seal failure is due to a minor issue (e.g., a loose bolt or minor wear), some might argue that a cheaper seal could suffice. However, Fel-Pro s reputation for longevity often outweighs this concern unless the vehicle is nearing the end of its life.

5. **Limited Availability in Some Areas** Depending on location, Fel-Pro parts may not be as widely stocked as OEM or generic brands, requiring online ordering or special trips to an auto parts store.

6. **Timing Belt Replacement Often Required** Many mechanics recommend replacing the timing belt and water pump at the same time as the crankshaft seal, as these components are typically accessed during the same procedure. This adds to the cost and complexity of the job.

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### **Conclusion and Recommendation**

The **Fel-Pro TCS-45903 front crankshaft seal kit** is a strong choice for a 1993-2001 Nissan Altima, particularly if you prioritize durability, proper fitment, and long-term reliability. The pros such as high-quality materials, ease of installation (with proper tools), and compatibility with common issues far outweigh the cons for most owners. The higher cost is justified by the reduced risk of premature failure and the avoidance of secondary damage (e.g., to the timing belt).

- **Buy the Fel-Pro kit** if you are replacing the seal due to a confirmed leak or as part of a scheduled maintenance interval. It is the best balance of quality and performance for this application.

- **Have it installed by a professional** if you lack experience with crankshaft seal replacement, as improper installation can negate the benefits of the seal.

- **Consider bundling the replacement with the timing belt and water pump** if they haven t been serviced recently, as this is a common practice to prevent future issues.

- **Avoid cheaper alternatives** unless you are certain the seal failure is minor and the vehicle has limited remaining life, as generic seals may not last as long and could lead to repeated problems.

For most Altima owners, the Fel-Pro TCS-45903 is the **best available option** for a reliable, long-lasting crankshaft seal replacement.

Details:

Validated for fit, form, and function. Unsurpassed quality you can trust. 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.

Engineered and manufactured specifically for repair applications. Meets or exceeds all original equipment specifications. Front Crankshaft Seal Kit TCS 45903 by Fel-Pro.

part #: tcs45903 prices

• $9.00-$18.30

specifications cranshafengin:

• for models: Altima
• for makes: Nissan
• for years: 1993-2001
• brand: Fel-pro
• mpn: Tcs-45903
• part type: Seal Crankshaft
• product type: Engine
• upc: 084113651786
• fitment type: Direct Replacement
• compatible make s : Nissan, Infiniti
• compatible model s : Altima, Sentra, 240sx, 200sx, G20
• product subtype: Crankshafts
• placement on vehicle: Front
• product details: Engine Crankshaft Seal
• engine version: Nissan Sr20
• department: Replacement

shipping cranshafengin:

• class: Standard
• carrier: FedEx
• type: Calculated
• cost: $19.00
• service: FedEx Ground / FedEx Home Delivery
• transit: 2-6 Days

general cranshafengin:

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

offer cranshafengin:

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

payments cranshafengin:

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

returns cranshafengin:

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

seller cranshafengin:

• # reviews: 159590
• rating: 99.2%
• city: Saint Paul, Minnesota

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