NATIONAL 78SBNRCW Front Crankshaft Seal 2.5L

( Brand: National ), ( Manufacturer Part Number: 78SBNRCW ), ( Part Type: Seal Crankshaft ), ( Engine: 2.5l 4 Cyl ), ( Compatible Make/model: Mazda Cx5 ), ( Compatible Years: 2014 2015 2016 2017 2019 14 15 16 17 19 ), ( Position: Front ), ( Fitment Info: Engine Crankshaft Seal ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Read Full Description To Confirm Fitment ), ( Cs-sku: 400 )

Review NATIONAL Front Crankshaft Seal Mazda 2.5l Cyl fits CX5 2014–2019

The **National 78SBNRCW Front Crankshaft Seal** is a high-performance, precision-engineered replacement part designed specifically for Mazda CX-5 models spanning the years 2014 through 2017, with an extended compatibility for the 2019 model equipped with a 2.5L Skyactiv-G engine. This seal is meticulously crafted to meet or exceed OEM standards, ensuring a reliable and long-lasting solution for preventing oil leaks at the front of the crankshaft. Constructed from a durable, high-quality rubber compound reinforced with synthetic fibers, the seal is engineered to withstand the demanding conditions of modern automotive engines, including high temperatures, pressure fluctuations, and constant rotational stress. Its unique design incorporates a robust lip profile and optimized geometry, which enhances sealing efficiency while reducing friction, thereby extending both the seal s lifespan and the overall health of the engine. The National brand is renowned for its commitment to quality and innovation, and this particular seal reflects that dedication with its precision-molded fit and compatibility with the engine s internal components, including the crankshaft pulley and oil pump. Whether addressing a minor oil leak or performing a routine maintenance upgrade, this seal provides a seamless, hassle-free installation and delivers peace of mind with its reputation for durability and performance. Perfect for DIY enthusiasts or professional mechanics, the **National 78SBNRCW** is the ideal choice for restoring engine integrity and maintaining optimal vehicle performance.

### Pros and Cons of buying a National 78SNBR-CW Front Crankshaft Seal for a 2014-2017 (and 2019) 2.5L Mazda CX-5

1. **Compatibility** This seal is specifically designed for the 2.5L Skyactiv-G engine found in the 2014-2017 and 2019 Mazda CX-5 models, ensuring a proper fit and reducing the risk of installation errors.

2. **Quality Materials** National is a well-known brand in the aftermarket automotive parts industry, known for producing durable seals that resist oil leaks and wear over time. Their products are often engineered to meet or exceed OEM standards.

3. **Ease of Installation** The seal is designed with modern manufacturing techniques, which typically means it is easier to install compared to older, less precise seals. This can save time and reduce the risk of damage during replacement.

4. **Warranty Coverage** National parts often come with manufacturer warranties, providing some assurance against defects. This can be particularly useful if the seal fails prematurely due to a manufacturing issue.

5. **Cost-Effective Alternative** While not always the cheapest option, this seal offers a balance between price and quality, making it a practical choice for DIYers or those looking to avoid OEM pricing.

6. **Positive User Feedback** Many Mazda owners and mechanics report success with National seals, citing reliable performance and long-lasting results when installed correctly.

---

1. **Price** Compared to generic or budget-brand seals, National parts are typically more expensive. For some buyers, this may be a significant factor, especially if they are on a tight budget.

2. **Potential for Counterfeit Products** Since National is a reputable brand, there is a risk of purchasing counterfeit or low-quality knockoffs, particularly if buying from untrusted sellers. Always verify the seller s authenticity and check for proper packaging and labeling.

3. **Installation Challenges** While the seal itself is designed for ease of use, improper installation (e.g., not cleaning the mating surfaces properly, overtightening bolts, or damaging the seal during removal) can lead to leaks or premature failure. This requires careful attention to detail.

4. **Limited Availability** Depending on the region, this specific part may not be as widely stocked as OEM or other aftermarket brands. This could result in longer wait times for delivery, especially if ordering online.

5. **Mixed Reviews on Durability** While many users report positive experiences, there are occasional reports of seals failing sooner than expected, particularly if the engine was previously damaged or if the installation was subpar. This variability underscores the importance of proper maintenance and installation.

6. **No Direct Mazda Warranty Coverage** Unlike OEM parts, National seals are not covered under Mazda s factory warranty. If the seal fails within the warranty period, the owner would need to cover the cost of replacement themselves.

---

The National 78SNBR-CW front crankshaft seal is a solid choice for Mazda CX-5 owners looking for a reliable, high-quality replacement. Its compatibility, durability, and ease of installation make it a preferred option for many, especially those who prioritize long-term performance over cost. However, the higher price point and potential risks of counterfeit products or installation errors should be carefully considered.

For those willing to invest in a quality part and ensure proper installation, this seal is highly recommended. If budget is a major concern, it may be worth comparing it to other reputable aftermarket brands (e.g., Gates, Fel-Pro, or ATE) to find the best balance between price and performance. Always purchase from trusted suppliers to avoid counterfeit products, and follow the manufacturer s installation guidelines to maximize the seal s lifespan.

If you are replacing a worn or leaking front crankshaft seal in your 2014-2017 or 2019 2.5L Mazda CX-5, the National 78SNBR-CW is a strong, reliable option. Opt for it if you value quality and are prepared to invest in a part that should last. Pair this purchase with a thorough installation process, including proper cleaning, torque specifications, and attention to detail, to ensure the best results. If cost is a primary concern, research alternatives but be cautious of compromising on quality, as a poor seal can lead to costly engine damage.

Details:

Front Crankshaft Seal fits Mazda CX5 2014 - 2017, 2019 2.5L 4 Cyl 78SBNRCW: Position: Brand: National condition: New Notes: Engine Seal, Features:Design type: spring loaded; multi-lip. 12 Month Warranty. Low swell in hydrocarbon fluids. Resistance to EP lubricants.

Detailed Applications Years: Vehicle: Engine: 2014 - 2017, 2019 Mazda CX52.5L 4 Cyl. Temperature range: 20F to 300F / 29C 49C. Delivers quality and reliable performance for every type of repair.

part #: 78sbnrcw price

• $24.14

specifications cranshafengin:

• for makes: Mazda
• for years: 2014-2019
• brand: National
• mpn: 78sbnrcw
• part type: Seal Crankshaft
• engine: 2.5l 4 Cyl
• compatible make/model: Mazda Cx5
• compatible years: 2014 2015 2016 2017 2019 14 15 16 17 19
• position: Front
• fitment info: Engine Crankshaft Seal
• manufacturer warranty: 12 Month Warranty
• attention: Read Full Description To Confirm Fitment
• cs-sku: 400

returns cranshafengin:

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

offer cranshafengin:

• quantity: 1
• started: April 7, 2026
• options: Ship-to-home
• sold: 0
• availability: In Stock

payments cranshafengin:

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

general cranshafengin:

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

shipping cranshafengin:

• cost: $0.00
• class: Economy
• transit: 2-6 Days
• type: Fixed
• service: Economy

seller cranshafengin:

• city: La Grange, Illinois
• rating: 99.2%
• # reviews: 23873

National 78SBNRCW Is Similar To:

• 1021v National Rear Engine Crankshaft 614046153431 (43.1% similar) Out of the seal and other wheel-end components. Don't just repair a leak, prevent future problems with National oil seal...(October 10th, 2017)
• 224660 National Bearings Oil Seal 724956233557 (33.3% similar) Standard size excellent resistance to petroleum-based oils and fuels, water alcohol good acids bases, except those with a strong oxidizing effect temperature range: -40. C manufacturer federal-mogul brand National bearings model NUMBER224660 UPC: 57 weight. Our satisfaction guarantee all of products...(January 24th, 2018)
• 229005 National New Engine Crankshaft 724956076116 (41.5% similar) Multi purpose seal. Provides good low temperature capability. Footnote: counter-clockwise-spiral lip design. Design type: spring loaded multi-lip. Delivers quality and reliable performance for every type of repair. Low swell in hydrocarbon fluids. Vehicles sold outside of the USA may be different, ...(October 3rd, 2017)
• 2377 National New Engine Crankshaft 724956077168 (42.2% similar) Design type: spring loaded multi-lip. Shipping labels may only be applied to a separate, outer box. Delivers quality and reliable performance for every type of repair. Temperature range: 40 deg f to 225 c 107. Multi purpose seal. Material: floury-elastic. Vehicles sold outside of the USA may be ...(October 14th, 2017)
• 239155 National Oil Seals Seal (32.7% similar) ...(July 20th, 2018)
• 2692 National New Engine Crankshaft 724956084043 (42.2% similar) Provides good low temperature capability. Low swell in hydrocarbon fluids. Multi purpose seal. Material: polyacrylamide. Design type: spring loaded multi-lip. Delivers quality and reliable performance for every type of repair. Series: 2000 . Temperature range: 40 deg f to 225 c 107. Footnote: ...(October 14th, 2017)
• 2942 National New Engine Crankshaft 724956085637 (42.2% similar) Delivers quality and reliable performance for every type of repair. Multi purpose seal. Vehicles sold outside of the USA may be different, even if they have same make and model name. Temperature range: 40 deg f to 225 c 107. Footnote: clockwise-spiral lip design. Design type: spring loaded multi-lip...(October 14th, 2017)
• 355660h National Oil Seals Seal 614046236912 (35.5% similar) ...(July 20th, 2018)
• 450867 National Seal 724956132119 (31.9% similar) 437 width mm: 11. Design type: spring loaded single-lip provides good low temperature capability swell in hydrocarbon fluids range: 40F to 225F 40C 107C engineered for performance, National oil seals deliver superior protection and long service life thanks premium material construction a patent-...(November 10th, 2017)
• 452261h National New Engine Crankshaft 724956234387 (41.2% similar) Temperature range: 40 deg f to 225 c 107. Housing bore inch: design type: spring loaded multi-lip. Provides good low temperature capability. Shipping labels may only be applied to a separate, outer box. Multi purpose seal. Vehicles sold outside of the USA may be different, even if they have same ...(October 13th, 2017)
• 472492 National Rear Wheel Seal 724956140367 (35.5% similar) This part is engineered to meet OE specs perfectly fit your vehicle. Rear wheel seal by National type: 47 width inch: outside diameter mm shaft 50. Don't just repair a leak, prevent future problems with National oil seal. This innovation aggressively deflects dirt, liquid, and other contaminants ...(November 10th, 2017)