MOPAR 4663625 Rear Crankshaft Seal

( Brand: Mopar ), ( Manufacturer Part Number: 4663625 ), ( Type: Craseal ), ( Manufacturer Warranty: 1 Year ), ( Placement On Vehicle: Rear ), ( Make: Chrysler ), ( Year: 1998 1999 2000 2001 2002 2003 2004 2005 2006 ), ( Fitment Type: Direct Replacement ), ( Certification: Genuine Oem )

Review MOPAR Genuine Chrysler Rear Main Crankshaft Seal fits CONCORDE 300M 1998–2006

The **Mopar 4663625 Rear Crankshaft Seal** is a precision-engineered component designed exclusively for the **1998 2006 Chrysler Concorde**, ensuring a reliable and long-lasting seal between the engine s crankshaft and the transmission housing. Crafted from high-quality **nitrile rubber**, this seal is engineered to withstand the demanding conditions of modern automotive applications, including exposure to oil, heat, and mechanical stress. The seal features a **metal-reinforced outer lip** that provides superior durability and resistance to deformation, preventing leaks that could lead to oil contamination or transmission damage. Its **precision-molded design** ensures a perfect fit within the Concorde s rear crankshaft area, minimizing clearance and maximizing sealing efficiency. Whether installed during routine maintenance or as part of a transmission or engine service, this Mopar seal delivers the performance and reliability expected from an OEM-quality part, helping to maintain optimal engine and transmission health while extending the lifespan of your vehicle s powertrain. Built to meet Chrysler s exacting standards, it offers a seamless replacement solution for those seeking genuine performance without compromise.

The **Mopar 4663625 rear crankshaft seal** is a common replacement part for the 3.5L and 3.8L V6 engines found in Chrysler Concordes, PT Cruisers, and other models from 1998 to 2006. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of buying a Mopar 4663625 Rear Crankshaft Seal**

1. **OEM Quality and Reliability**

- Mopar is Chrysler s official aftermarket brand, meaning the seal is designed to meet or exceed factory specifications. This reduces the risk of premature failure compared to lower-quality aftermarket alternatives.

2. **Direct Fitment**

- The part is engineered specifically for the 3.5L and 3.8L V6 engines in the specified models, ensuring compatibility without modifications. This eliminates guesswork during installation.

3. **Warranty Coverage**

- Mopar parts often come with a warranty (typically 12 24 months), providing peace of mind in case of defects. This is more reliable than some no-name brands with no backing.

4. **Ease of Availability**

- Mopar parts are widely stocked at auto parts stores (e.g., AutoZone, O Reilly, NAPA) and online retailers (e.g., Amazon, RockAuto). This makes it easier to purchase, especially for those without access to specialty suppliers.

5. **Compatibility with Common Modifications**

- Since the seal is OEM, it works well with aftermarket oil pumps, crankshaft position sensors, and other related components that may be installed for performance or reliability upgrades.

6. **Durability**

- The materials used in Mopar seals are generally robust, designed to withstand the engine s operating conditions for the life of the seal (typically 50,000 100,000 miles with proper maintenance).

7. **Installation-Friendly Design**

- The seal is straightforward to install, especially if the engine is already disassembled for other work (e.g., oil pan replacement). No special tools are required beyond a seal installer or a screwdriver.

8. **Positive User Feedback**

- Many owners and mechanics report satisfactory performance with Mopar seals, citing fewer leaks and longer service life compared to cheaper alternatives.

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### **Cons of buying a Mopar 4663625 Rear Crankshaft Seal**

1. **Higher Cost Compared to Aftermarket Brands**

- Mopar seals are more expensive than generic or no-name alternatives. For example, a Mopar seal may cost $20 $40, while a generic seal could be $10 $20. This can be a significant factor for budget-conscious buyers.

2. **Potential for Counterfeit Parts**

- Like many OEM parts, Mopar seals can be counterfeited. Buying from unauthorized sellers (e.g., untrusted online marketplaces) increases the risk of receiving a substandard or fake part. Always purchase from reputable dealers or authorized retailers.

3. **Limited Customization**

- Since it s an OEM part, there are no performance-enhancing variants (e.g., reinforced seals for high-RPM applications). If you re building a high-performance engine, you may need to source a specialized seal.

4. **Mixed Reviews on Longevity in Aggressive Driving**

- While Mopar seals are reliable under normal conditions, some users report premature failure if the engine is subjected to extreme heat, high RPM, or frequent oil changes beyond manufacturer recommendations.

5. **Dependence on Proper Installation**

- The seal s performance hinges on correct installation. Improper seating (e.g., not using a seal installer or over-torquing the crankshaft nut) can lead to leaks or damage. This requires careful attention during installation.

6. **Potential for Oil Leaks Over Time**

- Like all seals, the Mopar part can degrade with age or if the engine s oil is contaminated. Regular oil changes and using high-quality oil can mitigate this risk, but it s not guaranteed to last indefinitely.

7. **Limited Availability in Some Regions**

- While widely available in the U.S., Mopar parts may be harder to find in other countries or rural areas, requiring online orders or longer shipping times.

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### **Conclusion**

The **Mopar 4663625 rear crankshaft seal** is a solid choice for most owners of 1998 2006 Chrysler Concordes and related vehicles. Its OEM quality, reliability, and ease of installation make it a practical option for those who prioritize durability and compatibility. However, the higher cost and risk of counterfeit parts are drawbacks that must be weighed against the benefits.

For most casual drivers or those performing routine maintenance, the Mopar seal is a **recommended purchase** due to its proven track record. If budget is a concern, a high-quality aftermarket seal (e.g., Fel-Pro or Gates) can be a cost-effective alternative, provided it is sourced from a trusted brand. Always verify the part s authenticity and ensure proper installation to maximize its lifespan.

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### **Final Recommendation**

- You value OEM reliability and warranty coverage.

- You re performing maintenance on a stock or lightly modified engine.

- You can afford the higher cost and want to avoid potential issues with generic parts.

- You re on a tight budget and can find a reputable brand.

- You re comfortable with slightly higher risk in exchange for lower cost.

- You plan to perform other related upgrades (e.g., oil pump, crank sensor) that may justify a more economical seal.

**Avoid counterfeit or no-name seals unless absolutely necessary**, as they often fail prematurely and can cause costly damage if they leak oil into the transmission or onto the exhaust manifold. Always purchase from authorized dealers or well-reviewed online retailers.

Details:

Quirk Parts, Rear Main Crankshaft Seal. Genuine Mopar Part Number: 4663625.

part #: 4663625 prices

• $56.69-$65.90

specifications cranshafengin:

• for models: 300m, Concorde
• for makes: Chrysler, Mopar
• for years: 1998-2006
• brand: Mopar
• mpn: 4663625
• type: Craseal
• manufacturer warranty: 1 Year
• placement on vehicle: Rear
• make: Chrysler
• year: 1998 1999 2000 2001 2002 2003 2004 2005 2006
• fitment type: Direct Replacement
• certification: Genuine Oem

payments cranshafengin:

• wallet: Google-pay
• other
• credit card: Diners-club

offer cranshafengin:

• sold: 0
• availability: In Stock
• quantity: 1
• started: February 3, 2026
• options: Ship-to-home
• best offers: True

seller cranshafengin:

• # reviews: 1130816
• city: Braintree, Massachusetts
• rating: 99.6%

general cranshafengin:

• condition: New
• Engines Engine Parts > Gaskets, Seals Hardware > Gaskets Seals

returns cranshafengin:

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

shipping cranshafengin:

• cost: $0.00
• transit: 3-9 Days
• class: Standard
• type: Fixed
• carrier: UPS
• service: UPS Ground

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