AUDI 4H0399059G Motor Left Mount Bracket Retainer Plate 4.0T V8

( Manufacturer Part Number: 4H0399059G ), ( Type: Engine Mount ), ( Placement On Vehicle: Front, Left ), ( Material: Steel ), ( Manufacturer Warranty: 1 Year ), ( Performance Part: No ), ( Genuine Oem: Yes ), ( Color: Silver ), ( Fitment Make Model: Audi A8 Quattro ), ( Donors Vin : Wau32afd7fn015563 )

Review AUDI Motor Left Mount Bracket Retainer Plate 4.0t Sedan V8 fits QUATTRO A8 2015

The **Audi 4H0399059G Motor Left Mount Bracket Retainer Plate** is a precision-engineered component designed exclusively for the high-performance **2015 Audi A8 4.0T Quattro V8** model, ensuring optimal structural integrity and alignment of the engine bay s critical suspension and mounting system. Crafted from high-grade, heat-treated steel, this retainer plate serves as a vital link between the engine s left mount bracket and the surrounding chassis components, playing a crucial role in absorbing vibrations, reducing noise transmission, and maintaining precise engine positioning during dynamic driving conditions. Its robust construction is engineered to withstand the immense forces generated by the **4.0-liter twin-turbocharged V8**, which delivers an impressive **333 horsepower and 369 lb-ft of torque**, ensuring seamless power delivery and enhanced driving dynamics. The retainer plate s precise fitment is critical for maintaining the A8 s signature balance of luxury and performance, as it helps mitigate engine movement while preserving the vehicle s aerodynamic efficiency and ride comfort. Whether installed during routine maintenance, a performance upgrade, or a full engine bay refresh, this part is a direct OEM replacement, guaranteeing compatibility with Audi s stringent quality standards and the original vehicle specifications. Its seamless integration into the A8 s advanced **Quattro all-wheel-drive system** further underscores its importance in delivering the vehicle s signature blend of precision handling and refined power delivery, making it an indispensable component for owners seeking both reliability and performance.

### **Pros and Cons of buying a Audi 4H0399059G Motor Left Mount Bracket Retainer Plate (2015 A8 4.0T Quattro V8)**

1. **OEM Quality and Fit** This part is an original Audi component, ensuring a precise fit and compatibility with the 2015 A8 4.0T V8 engine bay. It avoids potential issues that may arise from aftermarket parts that are not designed to match Audi s engineering standards.

2. **Reliability and Durability** Audi s OEM parts are built to withstand the stresses of the 4.0T V8 s high-performance nature, including torque loads and vibrations. This reduces the risk of premature failure compared to lower-quality alternatives.

3. **Warranty Coverage** Purchasing directly from Audi or an authorized dealer often includes warranty protection, offering peace of mind in case of defects or installation issues. Some third-party sellers may also provide warranties, depending on the retailer.

4. **Prevents Engine Mount Wear** The retainer plate secures the motor mount bracket, preventing excessive movement or loosening over time. This helps maintain proper engine alignment, reducing strain on the mounts and suspension components.

5. **Compatibility with Aftermarket Upgrades** If you plan to modify your A8 (e.g., exhaust, intake, or suspension changes), an OEM retainer plate ensures that aftermarket parts integrate correctly without clearance issues.

6. **Easier Installation** Since it is a direct replacement, installation is straightforward if you have basic mechanical skills or access to a professional. No modifications to the engine bay are typically required.

7. **Supports Resale Value** Keeping your A8 with OEM or high-quality aftermarket parts can help maintain its value, especially if you plan to sell it in the future.

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1. **Higher Cost** OEM parts are significantly more expensive than aftermarket alternatives. The price of the 4H0399059G retainer plate may range from **$100 $200 **, depending on the seller (Audi dealer vs. third-party). This can be a financial burden if replacing multiple related components.

2. **Limited Availability** While this part is common for the 2015 A8 4.0T, sourcing it from an authorized dealer may require waiting for inventory. Third-party sellers (e.g., eBay, RockAuto, or specialty Audi parts shops) can offer faster delivery but may have varying quality levels.

3. **Potential for Counterfeit Parts** Buying from unverified sellers increases the risk of receiving a fake or substandard part. Always check seller ratings, return policies, and authenticity guarantees before purchasing.

4. **Additional Labor Costs** If you re not comfortable with engine bay work, labor costs at a dealership or mechanic can add **$100 $200 ** to the total expense. This is a recurring concern with any OEM part replacement.

5. **Overkill for Minor Issues** If the retainer plate is only loose or slightly worn but not failing, replacing it may be premature. In such cases, a cheaper aftermarket bolt or clamp might suffice temporarily.

6. **Weight Considerations** The OEM part is heavier than some aftermarket alternatives. While this isn t a major concern for most drivers, weight-sensitive modifications (e.g., track prep) might warrant lighter options.

7. **Environmental and Ethical Concerns** OEM parts contribute to e-waste when disposed of improperly. If sustainability is a priority, consider whether an aftermarket part with a longer lifespan might be a better long-term choice.

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The **4H0399059G motor left mount bracket retainer plate** is a **highly recommended OEM replacement** for the 2015 Audi A8 4.0T Quattro V8, especially if you prioritize reliability, fitment, and long-term durability. The cons primarily cost and potential counterfeit risks are outweighed by the benefits of using a genuine Audi part, which minimizes engine misalignment risks and ensures compatibility with other OEM components.

If budget is a concern, **high-quality aftermarket alternatives** (e.g., from brands like **Fel-Pro, Megasquirt, or local Audi specialists**) can offer comparable performance at a lower cost. However, these should be sourced from reputable sellers with good reviews.

- **Buy from an authorized Audi dealer or a trusted third-party seller** (e.g., **eBay with verified feedback, RockAuto, or specialty Audi parts stores**) to ensure authenticity.

- **Compare prices** across multiple sellers to find the best deal without compromising quality.

- **Consider professional installation** if you lack experience with engine bay work, as improper handling could void warranties or cause further damage.

- **Check for related wear** (e.g., motor mounts, bolts, or gaskets) while the engine bay is open, as these may need replacement simultaneously for optimal performance.

**Final Verdict:** **Worth the investment for OEM reliability**, but weigh the cost against aftermarket options if budget is tight. Prioritize quality over price to avoid future issues.

Details:

From engines and transmissions to body panels, lighting, interior components, every part is carefully inspected ensure reliability, performance, value. You can then confirm exactly where you would like the panel to be cut before shipment. Items should be packaged securely to prevent damage during shipping. All parts are used with normal wear; major damage is noted in the listing.

Installation Guidelines Match parts with existing ones before installation. To reduce exposure, avoid breathing exhaust, limit idling, work in a well-ventilated area, and wash your hands or wear gloves when servicing. All engines are tested for compression before shipping. Do not force installation if parts do match.

part #: 4h0399059g prices

• $47.49-$298.51

specifications engimou:

• for models: A8, Quattro
• for makes: Audi
• for years: 2015
• mpn: 4h0399059g
• type: Engine Mount
• placement on vehicle: Front, Left
• material: Steel
• manufacturer warranty: 1 Year
• performance part: No
• genuine oem: Yes
• color: Silver
• fitment make model: Audi A8 Quattro
• donors vin : Wau32afd7fn015563

payments engimou:

• wallet: Apple-pay
• credit card: Visa
• other

seller engimou:

• # reviews: 306
• rating: 100.0%
• city: West Milford, New Jersey

offer engimou:

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

returns engimou:

• paid by: Seller
• time: 60 Days
• policy: Returns Accepted

general engimou:

• Car Truck Parts Accessories > Engines Engine Parts > Engine Mounts
• condition: Used

shipping engimou:

• transit: 3-8 Days
• class: Standard
• type: Fixed
• cost: $0.00
• service: Standard

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