HYUNDAI 21835-3M300 Transmission Crossmember Mount 4.6L 4266

( Manufacturer Part Number: 21835-3M300 ), ( Type: Automatic Transmission ), ( Ipn: 4.6l ), ( Oe/oem Part Number: 21855-3m300, 21835-3m300 ), ( Vintage Part: No ), ( Country Of Origin: Korea, Republic Of )

Review HYUNDAI Sedan 4.6l Transmission Crossmember Mount Oem #4266 fits GENESIS 2009–2014

The **Hyundai 21835-3M300 (09-14 Genesis 4.6L Transmission Crossmember Mount, Part #4266)** is a high-performance, direct-fit suspension component meticulously engineered to restore proper alignment and structural integrity to the transmission crossmember assembly on select Hyundai Genesis models equipped with the iconic 4.6-liter V8 engine (V870 platform) from the 2009 through 2014 model years. This precision-crafted mount serves as a critical load-bearing element, anchoring the transmission crossmember to the vehicle s undercarriage while absorbing vibrations, road shocks, and engine torque to prevent excessive wear on surrounding components. Constructed from durable **high-grade steel**, this mount is designed to withstand the rigorous demands of daily driving, high-performance applications, and extended use without warping, cracking, or losing its structural integrity. Its robust construction ensures a secure, vibration-dampening connection between the transmission and the chassis, reducing unwanted noise, rattles, and harshness that often accompany worn or degraded factory mounts. The **direct-fit design** eliminates the need for modifications, ensuring an effortless installation that aligns perfectly with the original mounting points, maintaining factory tolerances and alignment specifications. Whether addressing a sagging crossmember, excessive movement, or transmission-related rattles, this replacement mount provides a reliable, long-lasting solution that enhances both the driving experience and the longevity of the vehicle s drivetrain. Ideal for mechanics, DIY enthusiasts, and restoration projects, this part is a must-have for maintaining the structural soundness and performance of your Hyundai Genesis, ensuring a smoother, quieter, and more stable ride.

### **Pros and Cons of buying a Hyundai 21835-3M300 (09-14 Genesis 4.6L Transmission Crossmember Mount, Part #4266)**

1. **Direct Fitment** This part is specifically designed for the 2009-2014 Hyundai Genesis with a 4.6L V8 engine, ensuring compatibility without modification.

2. **Durability** Hyundai parts are generally built to withstand the stresses of a transmission crossmember, which supports heavy loads and absorbs vibrations.

3. **OEM Quality** Being an original equipment manufacturer (OEM) part, it meets Hyundai s engineering standards, reducing the risk of premature failure.

4. **Warranty Coverage** Purchasing from a reputable seller (such as Hyundai s official parts distributor or a trusted auto parts retailer) may include a warranty, offering protection against defects.

5. **Prevents Further Damage** A failing crossmember mount can lead to transmission misalignment, drivetrain issues, or even transmission failure. Replacing it proactively can save costly repairs later.

6. **Ease of Installation** While some aftermarket parts may require additional tools or modifications, this OEM part should fit standard tools and procedures, making installation more straightforward.

7. **Reliability** Hyundai s engineering ensures that this part is designed to last the lifespan of the vehicle under normal conditions, reducing long-term concerns.

1. **Cost** OEM parts are typically more expensive than aftermarket alternatives, which may be a significant investment depending on labor costs.

2. **Limited Availability** Since this is an older model (09-14 Genesis), finding the exact part may require ordering from a specialty supplier, potentially increasing lead time.

3. **Potential Counterfeit Risk** If purchasing from an untrusted seller, there is a risk of receiving a counterfeit or low-quality part that fails prematurely.

4. **Labor Intensive Replacement** Replacing a transmission crossmember mount often requires lifting the vehicle, removing the transmission or subframe, and ensuring proper alignment, which may require professional labor.

5. **Mixed Reviews on Aftermarket Alternatives** While this is an OEM part, some owners opt for aftermarket brands (e.g., Mann, Febi, or local manufacturers) for cost savings, though quality varies.

6. **Wear on Related Components** If the mount has been failing for some time, adjacent parts (such as bushings, bolts, or the transmission itself) may show signs of wear, requiring additional inspections or replacements.

7. **Resale Impact** If you plan to sell the vehicle later, some buyers may prefer a vehicle with all OEM parts, though this is subjective.

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### **Conclusion**

The **Hyundai 21835-3M300 (09-14 Genesis 4.6L Transmission Crossmember Mount, Part #4266)** is a **reliable, high-quality OEM replacement** that ensures proper fitment and durability. While it comes at a higher cost than aftermarket options, the long-term benefits such as preventing transmission damage, maintaining drivetrain integrity, and avoiding costly repairs make it a **strong choice for serious owners or those prioritizing longevity**.

If budget is a concern, **aftermarket alternatives from reputable brands** (e.g., Mann Filter, Febi Bilstein, or local Hyundai-approved suppliers) may offer comparable quality at a lower price, though thorough research is advised. However, for **maximum peace of mind and warranty coverage**, the OEM part is the safest option.

- You want guaranteed compatibility and warranty protection.

- You prioritize long-term reliability over cost savings.

- You are replacing the part as part of a full transmission or drivetrain service.

- You are on a tight budget and have verified the brand s reputation.

- You are comfortable with installation and willing to research the part s quality.

- You plan to inspect the part upon arrival to ensure authenticity.

For most owners, **the OEM part is the best choice** to avoid future transmission issues and ensure the vehicle remains in optimal condition. Always purchase from a **trusted dealer or authorized Hyundai parts supplier** to avoid counterfeit products.

Details:

Good working condition. No other parts are included unless pictured. Please match all part numbers and photos with your original to ensure proper fitment. This will show every part removed from this exact car.

Removed from 2011 Hyundai Genesis Sedan 4.6L.

part #: 218353m300 prices

• $30.43-$67.96

specifications autotransmissionsgo:

• for models: Genesis
• for makes: Hyundai
• for years: 2009-2014
• mpn: 21835-3m300
• type: Automatic Transmission
• ipn: 4.6l
• oe/oem part number: 21855-3m300, 21835-3m300
• vintage part: No
• country of origin: Korea, Republic Of

offer autotransmissionsgo:

• availability: In Stock
• options: Ship-to-home
• started: March 2, 2026
• quantity: 1
• sold: 0

returns autotransmissionsgo:

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

payments autotransmissionsgo:

• wallet: Paypal
• credit card: Discover
• other

seller autotransmissionsgo:

• rating: 99.9%
• # reviews: 1449
• city: Vancouver, Washington

shipping autotransmissionsgo:

• service: USPS Ground Advantage
• transit: 4-9 Days
• carrier: USPS
• class: Standard
• type: Fixed
• cost: $0.00

general autotransmissionsgo:

• condition: Used
• Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission

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