FELPRO BS-40742 Crankshaft Seal Rear 019826554314 Bs

( Brand: Felpro ), ( Manufacturer Part Number: BS-40742 ), ( Part Type: Seal Crankshaft ), ( Anticipated Ship Out Time: Same Day 1 Business Day ), ( Fitment Type: Direct Replacement ), ( Part Name: Crankshaft Seal ), ( Placement On Vehicle: Rear ), ( UPC: 019826554314 ), ( Manufacturer Warranty: 1 Year )

Review FELPRO Bs 40742 Crankshaft Seal Rear Hyundai Kia fits ELANTRA OPTIMA SONATA FORTE

The **Fel-Pro BS-40742 BS40742 Crankshaft Rear Seal** is a premium, high-performance sealing solution specifically engineered to meet the rigorous demands of modern Hyundai and Kia engines, including the **Hyundai Elantra, Kia Optima, Kia Sonata, and Kia Forte**. Crafted from Fel-Pro s proprietary **high-temperature, oil-resistant elastomer compound**, this seal is designed to deliver exceptional durability, superior resistance to oil degradation, and reliable long-term performance under extreme operating conditions. The seal features a **precision-molded, reinforced lip design** that ensures an optimal seal against the crankshaft, minimizing oil leakage while maintaining smooth operation even under high-speed and high-load scenarios. Its **metallic reinforcement** enhances structural integrity, reducing the risk of premature wear or deformation, which is particularly critical in engines prone to vibration or misalignment. The BS-40742 is compatible with a wide range of **GDI (Gasoline Direct Injection) and turbocharged applications**, making it an ideal choice for vehicles that demand both efficiency and longevity. Fel-Pro s reputation for **consistent quality and engineering excellence** ensures that this seal not only fits seamlessly into Hyundai and Kia s aftermarket repair standards but also exceeds OEM specifications in terms of performance and reliability. Whether addressing a leaking rear main seal, preparing for a major engine overhaul, or upgrading an existing installation, the Fel-Pro BS-40742 provides a **trusted, long-lasting solution** that helps prevent costly oil leaks, engine contamination, and potential damage to critical components. Built to withstand the thermal and mechanical stresses of modern automotive engines, this seal is a dependable choice for mechanics and DIY enthusiasts alike who prioritize quality and performance.

### Pros and Cons of buying a Fel-Pro BS-40742 Crankshaft Seal (Rear) for Hyundai Elantra, Kia Optima, Sonata, and Forte

1. **High-Quality Material** Fel-Pro is a well-known brand in the automotive aftermarket, known for using durable materials that resist oil leaks and heat better than many generic alternatives. Their seals are often made with reinforced rubber and high-temperature-resistant compounds, which helps extend the life of the seal.

2. **Proper Fitment** The BS-40742 is specifically designed for the rear crankshaft seal in the Hyundai Elantra (2007 2010), Kia Optima (2006 2011), Sonata (2006 2011), and Forte (2009 2011). This ensures compatibility with the engine bay s dimensions and mounting points, reducing the risk of installation errors.

3. **Longer Lifespan Compared to OEM** Many aftermarket seals, including Fel-Pro s, are engineered to outlast the original equipment manufacturer (OEM) seals, which can degrade faster due to cheaper materials or manufacturing inconsistencies.

4. **Easier Installation** Fel-Pro seals often come with pre-lubricated surfaces or installation aids (like a smooth lip design), making them easier to seat properly during installation. This can reduce the risk of damage to the seal or engine components during replacement.

5. **Warranty Coverage** Fel-Pro offers a warranty on its products, providing some assurance against premature failure due to defects in materials or workmanship. This can be a reassuring factor when investing in a replacement part.

6. **Positive Industry Reputation** Fel-Pro is a trusted name in the automotive aftermarket, with a long history of producing reliable seals, gaskets, and filters. Mechanics and DIY enthusiasts often recommend Fel-Pro for its consistency and performance.

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

2. **Potential Overkill for Some Applications** If the original seal failed due to a minor issue (e.g., improper installation, minor oil contamination, or a short lifespan), a high-end seal like the Fel-Pro may not be necessary. In such cases, a mid-range aftermarket seal could suffice.

3. **Installation Skill Dependency** Even with a high-quality seal, improper installation (e.g., not cleaning the mating surfaces, overtightening, or damaging the seal during removal) can lead to leaks. This requires careful attention to detail during the replacement process.

4. **Limited Availability in Some Regions** Depending on where you purchase the seal, Fel-Pro parts may not be as widely stocked as OEM or generic alternatives. This could require ordering online or visiting specialty auto parts stores.

5. **Mixed Reviews on Durability in Extreme Conditions** While Fel-Pro seals are generally durable, extreme operating conditions (e.g., high RPMs, excessive heat, or contaminated oil) can still cause premature failure in any seal. The seal s longevity depends partly on the vehicle s maintenance history.

6. **Potential for Counterfeit Products** When buying online, there is a risk of receiving counterfeit Fel-Pro parts, which may not meet the same quality standards. Purchasing from reputable sellers (e.g., Amazon, RockAuto, or authorized dealers) helps mitigate this risk.

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The Fel-Pro BS-40742 crankshaft seal is a strong choice for Hyundai Elantra, Kia Optima, Sonata, and Forte owners due to its high-quality materials, proper fitment, and reputation for durability. It is particularly well-suited for those who prioritize long-term reliability and are willing to invest in a premium part. However, if budget is a constraint or the original seal failed due to a minor issue, a mid-range aftermarket seal might be a cost-effective alternative.

For most drivers, the Fel-Pro seal offers a good balance between performance and longevity, making it a recommended option for a rear crankshaft seal replacement. Proper installation is key to maximizing its lifespan, so ensure the engine bay is clean and the seal is seated correctly during installation.

If you are replacing a failed rear crankshaft seal in your Hyundai Elantra, Kia Optima, Sonata, or Forte, the **Fel-Pro BS-40742 is a highly recommended choice**. It provides superior quality compared to OEM or generic seals and is likely to outlast the original part. Purchase from a trusted retailer to avoid counterfeit products, and follow proper installation procedures to ensure a leak-free result. If you are on a tight budget or the seal failed due to a minor issue, consider a reputable mid-range aftermarket alternative (e.g., Duralast or Gates), but Fel-Pro remains the top-tier option for most applications.

Details:

Felpro Crankshaft Seal. Fel-Pro is a leading brand of gaskets and sealing solutions in the automotive aftermarket.Constructed with finest quality materials for superior durability. Location: Rear. Easy installation.

Designed to ensure leak-proof seal. 2014 2019 Elantra SE. 2011 2019 Elantra Limited. 2011 -2015, 2017 2018 Elantra GLS.

2017 2018 Elantra LE. Precision-engineered to address each applications unique characteristics.

part #: bs40742 prices

• $27.85-$28.48

specifications cranshafengin:

• for models: Elantra, Optima, Sonata, Forte
• for makes: Hyundai, Kia
• brand: Felpro
• mpn: Bs-40742
• part type: Seal Crankshaft
• anticipated ship out time: Same Day 1 Business Day
• fitment type: Direct Replacement
• part name: Crankshaft Seal
• placement on vehicle: Rear
• upc: 019826554314
• manufacturer warranty: 1 Year

offer cranshafengin:

• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home
• started: April 8, 2026

general cranshafengin:

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

shipping cranshafengin:

• type: Fixed
• class: Expedited
• cost: $0.00
• transit: 2-5 Days
• carrier: USPS
• service: USPS Priority Mail

seller cranshafengin:

• # reviews: 106881
• rating: 99.6%
• city: La Salle, Illinois

returns cranshafengin:

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

payments cranshafengin:

• other
• credit card: Mastercard
• wallet: Paypal

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