MOPAR MR478263 Grommet

( Manufacturer Part Number: MR478263 ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Make: Chrysler ), ( Year: 2001 2002 2003 2004 2005 ), ( Type: Bumper )

Review MOPAR Genuine Grommet fits 2001–2005

The **Mopar MR478263 Grommet** is a precision-engineered rubber sealing component designed specifically for Mopar-equipped vehicles, ensuring optimal performance, durability, and reliability in critical engine and drivetrain applications. Crafted from high-quality synthetic rubber, this grommet is engineered to withstand extreme temperatures, chemical exposure, and mechanical stress, making it an indispensable part of maintaining a leak-free and efficient powertrain system. Its robust construction prevents fluid leaks, dust ingress, and moisture intrusion, thereby protecting internal components from contamination and premature wear. The grommet features a tight, interference-fit design that secures it firmly in place, whether installed in the engine bay, transmission housing, or other high-stress areas where sealing integrity is paramount. Ideal for use in Mopar vehicles spanning multiple model years, this grommet is a direct-fit replacement for OEM parts, ensuring seamless compatibility without the need for modifications. Whether used in modern high-performance engines or classic Mopar applications, this grommet delivers consistent sealing performance, contributing to longer component life and reduced maintenance requirements. Built to meet or exceed factory specifications, it is a trusted choice for mechanics, DIY enthusiasts, and restoration specialists seeking dependable, long-lasting solutions for their Mopar-powered vehicles.

**Pros and Cons of buying a Mopar MR478263 Grommet**

The Mopar MR478263 grommet is a part commonly used in Mopar (Chrysler, Dodge, Jeep) vehicles, particularly in applications like the 4.0L or 5.2L engines where it serves as a seal between the valve cover and the cylinder head. Below is a detailed breakdown of its advantages and disadvantages.

### **Pros**

1. **OEM Quality and Reliability**

The Mopar MR478263 grommet is an original equipment manufacturer (OEM) part, meaning it meets the same high standards as the grommet installed during vehicle manufacturing. This ensures a proper fit, durability, and compatibility with the engine components, reducing the risk of leaks or premature failure.

2. **Direct Compatibility**

Since it is designed specifically for Mopar applications, there is no need for modification or additional adapters. It fits seamlessly into the valve cover gasket assembly, ensuring a tight seal that prevents oil leaks and contamination.

3. **Long-Term Durability**

OEM grommets are typically made from high-quality materials, such as silicone or rubber compounds reinforced with fabric or fiberglass. This construction resists heat, oil, and engine vibrations, extending the lifespan of the valve cover assembly.

4. **Ease of Installation**

Replacing a grommet is a straightforward process that does not require specialized tools or extensive mechanical knowledge. Most DIYers can complete the job in under an hour, provided they follow proper procedures (e.g., cleaning the mating surfaces and applying a thin layer of sealant if recommended).

5. **Prevents Engine Contamination**

A failing grommet can allow oil to seep into the valve cover area, leading to sludge buildup or electrical shorts in the ignition system. Replacing it with an OEM part ensures a clean and protected environment for the valve cover and related components.

6. **Warranty Coverage (If Purchased New)**

If you buy the grommet new from an authorized Mopar dealer or an online retailer with a return policy, it may come with a warranty. This provides peace of mind in case of defects or premature failure.

7. **Supports Aftermarket and DIY Repairs**

For those who prefer to maintain their vehicles themselves, OEM parts like this grommet are often more affordable than dealer-supplied replacements. It also aligns with the goal of keeping repairs in-house rather than relying on dealership labor.

---

### **Cons**

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

OEM parts are generally more expensive than aftermarket equivalents. While the price difference may seem small for a single grommet, it can add up when replacing multiple parts or performing larger engine repairs. Aftermarket grommets from reputable brands (e.g., Fel-Pro, Goodyear, or ACDelco) may offer similar performance at a lower cost.

2. **Limited Availability Outside Mopar Channels**

If you purchase from a non-authorized seller (e.g., a third-party online marketplace), there is a risk of receiving a counterfeit or low-quality part. Always verify the seller s reputation and ensure the part is genuine to avoid issues.

3. **Potential for Overkill in Some Cases**

If the grommet is only one of many failing components (e.g., valve cover gasket, oil filter housing gasket), replacing just the grommet may not fully resolve the underlying issue. In such cases, a more comprehensive repair (e.g., replacing the entire valve cover gasket set) might be necessary, making the OEM grommet a less cost-effective choice.

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

While OEM grommets are durable, extreme conditions (e.g., high temperatures, frequent oil changes with low-quality oil, or severe engine stress) can still cause premature wear. Some users report that aftermarket grommets with advanced compounds (e.g., silicone with thermal barriers) outlast OEM parts in harsh conditions.

5. **Lead Times for Shipping**

Depending on the retailer, OEM grommets may have longer shipping times compared to aftermarket options, which are often stocked in larger quantities. This delay can be inconvenient if you need the part urgently for a repair.

6. **Potential for Misapplication**

While the MR478263 is specific to certain Mopar engines, there is a risk of confusing it with similar-looking grommets for other applications (e.g., intake manifolds or exhaust systems). Double-checking the part number and application is crucial to avoid purchasing the wrong grommet.

---

### **Conclusion**

The Mopar MR478263 grommet is a reliable and high-quality choice for maintaining or repairing Mopar engines, especially when you prioritize OEM compatibility, durability, and ease of installation. Its advantages such as direct fitment, long-term performance, and prevention of engine contamination make it a strong option for most DIYers and mechanics. However, the higher cost and potential availability issues with non-authorized sellers may deter some buyers, particularly those on a tight budget or looking for bulk repairs.

For most users, the benefits of an OEM grommet outweigh the drawbacks, especially if the grommet is part of a larger valve cover gasket replacement or if you value the assurance of a factory-spec part. That said, if cost is a major concern and you re confident in the quality of an aftermarket alternative, reputable brands like Fel-Pro or Goodyear can offer comparable performance at a lower price.

### **Recommendation**

- You are performing a valve cover gasket replacement or related repair on a Mopar engine (e.g., 4.0L, 5.2L, or similar applications).

- You prioritize OEM quality, reliability, and warranty coverage (if purchasing new).

- You have access to an authorized Mopar dealer or a trusted online retailer to ensure authenticity.

- The grommet is part of a larger repair where OEM parts are already being used.

- You are on a tight budget and can find a high-quality aftermarket grommet (e.g., Fel-Pro 52000 or Goodyear 19600) that fits your engine.

- You are replacing multiple components and want to minimize costs without sacrificing performance.

- You are working in extreme conditions (e.g., high heat, frequent oil changes) and prefer a grommet with advanced heat-resistant compounds.

For most Mopar engine applications, the Mopar MR478263 grommet is the best choice due to its reliability and compatibility. However, weigh the cost against aftermarket options if budget is a limiting factor. Always verify the part number and application to avoid errors, and purchase from a reputable source to ensure you receive a genuine OEM grommet.

Details:

Parts must be resalable and in the original packaging. Parts must be resalable and in the original packaging. Electrical parts are not returnable. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer.

Genuine Mopar Grommet MR478263: Parts: NONE.

part #: mr478263 price

• $34.77

specifications frontbumperus:

• for makes: Mopar
• for years: 2001-2005
• mpn: Mr478263
• genuine oem: Yes
• manufacturer warranty: 1 Year
• fitment type: Direct Replacement
• make: Chrysler
• year: 2001 2002 2003 2004 2005
• type: Bumper

returns frontbumperus:

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

offer frontbumperus:

• started: February 16, 2026
• quantity: 4
• sold: 0
• availability: In Stock
• options: Ship-to-home

general frontbumperus:

• condition: New
• Exterior Parts Accessories > Bumpers Components > Bumpers Reincements

seller frontbumperus:

• # reviews: 2558
• city: Claremont, New Hampshire
• rating: 98.9%

shipping frontbumperus:

• service: Standard, Expedited, Overnight
• class: Standard, Expedited, One-day
• transit: 4-9 Days
• cost: $0.00
• type: Fixed

payments frontbumperus:

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

Mopar MR478263 Is Similar To:

• 05030044aa Chrysler Brand New Genuine Mopar Oem Bumper Trim (33.7% similar) All of Tosca's top quality oem replacement parts are backed by a 12 month 12,000 mile warranty...(March 1st, 2019)
• 05113097ab Chrysler Brand New Genuine Mopar Oem Bumper Impact Bar (33.7% similar) Continental us. There is always a member of the Tosca family to meet with customer. The Tosca family has also led nation in both ford and Lincoln mercury sales during our history. Return procedure all of Tosca's top quality oem replacement parts are backed by a 12 month 12,000 mile warranty. Over ...(July 3rd, 2018)
• 06505145aa Chrysler Brand New Genuine Mopar Oem Bumper Impact Bar Bolt (32% similar) All of Tosca's top quality oem replacement parts are backed by a 12 month 12,000 mile warranty. Manufacturer part number: 6505145AA identified in schematic if applicable: no available...(October 23rd, 2018)
• 06511014aa Chrysler Brand New Genuine Mopar Oem Bumper Guide Rivet (37.5% similar) All of Tosca's top quality oem replacement parts are backed by a 12 month 12,000 mile warranty...(October 10th, 2018)
• 1ml22tzzaa Mopar Jeep Genuine Wrangler (50% similar) Parts must be resalable and in the original packaging. Shipping carrier substitutions may be made at our determination in an attempt to reduce cost the customer. Electrical parts are not returnable...(April 25th, 2017)
• 1sr91sz0aa Mopar Genuine (48.1% similar) Electrical parts are not returnable. Our jeep parts team is here to help. Parts must be resalable and in the original packaging. Shipping carrier substitutions may be made at our determination in an attempt to reduce cost the customer...(June 23rd, 2018)
• 4676346 Mopar Chrysler Genuine Town (52.3% similar) ...(June 7th, 2017)
• 4716624 Mopar Chrysler Dodge Genuine (45.5% similar) ...(June 7th, 2017)
• 4741101 Mopar Genuine 93 To (52.6% similar) New genuine 93 to 96 jeep grand Cherokee rear left bumper guard trim part number: 4741101NEW, original mopar parts...(November 26th, 2017)
• 55077766aa Chrysler Brand New Genuine Mopar Oem Bumper Cover Spacer Panel (29.1% similar) Over his many years, he has developed a business of best in class sales and service. There is always a member of the Tosca family to meet with customer. All of Tosca's top quality oem replacement parts are backed by a 12 month 12,000 mile warranty...(April 24th, 2018)
• 68051389aa Mopar Genuine Energy (49.2% similar) Shipping carrier substitutions may be made at our determination in an attempt to reduce cost the customer. Parts must be resalable and in the original packaging. Electrical parts are not returnable. Our jeep parts team is here to help...(June 23rd, 2018)