CHEVROLET 42749057 Bolt Drive Unit Engine Motor Rearward Ev Mount Bracket

( Manufacturer Part Number: 42749057 ), ( Location: Nwah8f4 ), ( Listed: Um53 ), ( Type: Engine Mount ), ( Material: Aluminum )

Review CHEVROLET Bolt Ev Drive Unit Engine Motor Rearward Mount Bracket Oem fits 2017–2023

The **Chevrolet 42749057 Bolt Drive Unit Engine Motor Rearward Mount Bracket** is a precision-engineered, high-performance component designed specifically for the 2017 through 2023 Chevrolet Bolt EV, serving as a critical structural and functional link between the electric drive unit and the vehicle s chassis. This robust, cast aluminum bracket is engineered to withstand the dynamic forces generated by the high-torque, high-speed operation of the Bolt s electric motor, ensuring optimal alignment, stability, and longevity of the drivetrain system. Positioned at the rearward end of the drive unit, the bracket securely mounts the motor assembly to the vehicle s underbody, absorbing vibrations, reducing noise, and mitigating potential stress on surrounding components. Its design incorporates reinforced mounting points and strategically placed gussets to enhance rigidity, preventing flex or misalignment that could compromise efficiency or lead to premature wear. Compatible exclusively with the Bolt s proprietary drive unit, this bracket is manufactured to meet or exceed OEM specifications, ensuring a seamless fit and reliable performance. Whether installed during original equipment assembly or as part of a repair or upgrade, this bracket plays a pivotal role in maintaining the Bolt s smooth, quiet, and efficient electric propulsion, contributing to the vehicle s overall durability and driver confidence.

### **Pros and Cons of buying a Chevrolet 42749057 (2017 2023 Bolt EV Drive Unit Engine Motor Rearward Mount Bracket)**

#### **Overview**

The **Chevrolet Bolt EV (2017 2023)** uses a **drive unit** that includes an **electric motor, inverter, and rearward mount bracket** (part number **42749057**). This component is critical for propulsion, and purchasing a replacement or refurbished unit may be necessary due to wear, failure, or recalls. Below are the key considerations for buying this part.

---

### **Pros of Buying This Part**

1. **OEM Quality and Reliability**

- The **42749057 bracket** is an **original equipment manufacturer (OEM) part**, meaning it is designed to match the factory specifications of the Bolt EV. This ensures proper fitment, durability, and compatibility with the vehicle s electrical and mechanical systems.

- Unlike aftermarket or generic replacements, an OEM part reduces the risk of premature failure or improper integration.

2. **Warranty Coverage (If Purchased from Authorized Sources)**

- If bought directly from **GM or an authorized dealer**, the part may come with a **limited warranty** (typically 1 2 years), providing peace of mind against defects.

- Some **refurbished or used parts** from reputable sellers (e.g., **Core Auto Parts, CarParts.com, or eBay Motors**) may also include warranties or return policies.

3. **Compatibility with Bolt EV Models**

- This bracket is **universal for the 2017 2023 Chevrolet Bolt EV**, including the **2020 2023 extended-range models**. This makes it a cost-effective solution if you own any of these trims.

- The part is **not specific to the Bolt EUV or Bolt EV 2024 **, so ensure compatibility before purchasing.

4. **Potential Cost Savings vs. Full Drive Unit Replacement**

- Replacing just the **rearward mount bracket** (due to wear or failure) is often **cheaper than buying a full drive unit assembly** (which can cost **$3,000 $5,000 ** installed).

- The bracket itself typically ranges from **$200 $600**, depending on whether it s **new, refurbished, or used**.

5. **Prevents Further Damage**

- A failing bracket can lead to **motor misalignment, vibration issues, or even electrical shorts** if the wiring harness is compromised. Replacing it early can **prevent more expensive repairs** down the line.

- Some Bolt EV owners report **loose or cracked brackets** due to **road vibrations or manufacturing defects**, especially in older models.

6. **Easier Installation (Compared to Full Drive Unit Swap)**

- Replacing just the bracket is a **simpler procedure** than swapping an entire drive unit, which often requires **specialized tools, torque specifications, and electrical reconnection**.

- Many mechanics and DIYers with basic EV repair experience can handle the job in **2 4 hours**.

7. **Recalled or Defective Parts Replacement**

- GM has issued **recalls for Bolt EV drive units** (including bracket-related issues) due to **potential fire risks or motor failures**. If your vehicle is affected, replacing the bracket (or full drive unit) may be **covered under a recall campaign**, saving you money.

---

### **Cons of Buying This Part**

1. **High Upfront Cost (Even for a Single Bracket)**

- While cheaper than a full drive unit, the **$200 $600 price range** is still significant for a single bracket. If the issue is **cosmetic or minor**, some owners may opt for **temporary fixes** (e.g., additional bracing) instead.

- **Labor costs** (if not DIY) can add **$150 $300**, making the total repair **$400 $900 **.

2. **Potential for Counterfeit or Low-Quality Parts**

- If purchasing from **unverified sellers** (e.g., eBay third-party sellers, Amazon, or unknown marketplaces), there is a risk of receiving a **counterfeit or poorly made bracket**.

- **Excessive vibration** in the motor area.

- **Unusual noises** (clanking, rattling).

- **Check Engine Light (CEL) codes** related to the drive unit (e.g., **P0607, P0608, P0610**).

- Always **verify the seller s reputation** and **check for authenticity** (e.g., GM part numbers, serial matching).

3. **Limited Availability of Refurbished/OEM Parts**

- **OEM brackets are not always in stock** at dealerships, leading to **long wait times** (weeks to months).

- **Refurbished parts** may have **unknown service history**, increasing the risk of future failure.

- Some sellers may **overcharge** for "new" parts that are actually **reconditioned**.

4. **Risk of Secondary Issues After Replacement**

- If the **motor or inverter** is already degraded, replacing just the bracket may **not fully resolve the problem**, leading to **recurring failures**.

- Some Bolt EV owners report that **bracket replacement alone doesn t fix vibration issues** if the **motor mounts or suspension are worn**.

- **Electrical grease corrosion** (common in Bolt EVs) may still affect performance, requiring **additional cleaning or replacement of connectors**.

5. **DIY Difficulty for Non-Experienced Owners**

- **Disconnecting high-voltage batteries** (safety risk if not done correctly).

- **Removing the rear subframe** (may need lifting the car).

- **Precise torque specifications** (over-tightening can damage threads).

- **Mistakes can lead to electrical shorts, motor damage, or voided warranties**.

6. **Potential for Recall-Related Issues**

- If your Bolt EV is **affected by a recall**, GM may **offer a free or discounted replacement** for the drive unit. Purchasing the bracket privately could **miss out on these benefits**.

- Always **check GM s recall portal** ( www.gmrecalls.com (https://www.gmrecalls.com)) before buying parts independently.

7. **Long-Term Durability Concerns**

- **Manufacturing defects** (common in early 2017 2018 models).

- **Road debris or potholes** causing impact damage.

- **Thermal expansion/contraction** (EV motors heat up quickly, stressing mounts).

- If the issue is **systemic**, replacing the bracket may be a **temporary fix** until GM issues a **bulk recall or software update**.

---

### **Conclusion**

- You **confirm the bracket is the root cause** of vibration/noise issues.

- You **purchase from a trusted source** (OEM dealer, authorized refurbisher, or verified seller).

- You **consider DIY installation** (or have a mechanic with EV experience).

- Your vehicle is **not covered by an active GM recall** that offers a better deal.

- The **motor or inverter is also failing**, a **full drive unit replacement** may be necessary.

- You **can t verify the part s authenticity**, risking counterfeit or low-quality components.

- You **lack mechanical/EV repair experience**, professional installation may be safer (but more expensive).

---

### **Recommendation**

1. **Diagnose the Problem First**

- Checking for **loose or cracked brackets** (inspect visually).

- **Scanning for CEL codes** (P0607, P0608, etc.) and running a **drive unit diagnostic**.

- **Listening for unusual noises** (clanking, rattling) when accelerating or driving over bumps.

2. **Check for Recalls**

- Visit ** GM s recall portal (https://www.gmrecalls.com)** to see if your Bolt EV is eligible for a **free or discounted drive unit replacement** due to a safety recall.

3. **Purchase from a Trusted Source**

- **Best option:** Buy directly from **GM or an authorized Bolt EV service center** (ensures OEM quality and warranty).

- **Core Auto Parts** (refurbished OEM parts).

- **CarParts.com** (verified sellers).

- **eBay Motors** (look for sellers with **high ratings and GM part authenticity guarantees**).

- **Avoid:** Random online marketplaces or sellers without **GM part numbers or return policies**.

4. **Consider Professional Installation**

- If you **don t have

Details:

2017 - 2023 CHEVROLET BOLT EV DRIVE UNIT ENGINE MOTOR REARWARD MOUNT BRACKET OEM Menu. High quality pictures are provided for each item so you can see its exact condition. 60-day return period begins on the day part is delivered. Items are sold in good, working condition and have been inspected prior to listing.

Pulsate Template v6-3-24 model: Bolt EV. Orders are shipped via USPS, UPS, or FedEx. Locations without a dock or forklift will incur lift gate fee. Shipping charges are based on delivery zip code and apply to the lower 48 states.

Are final sale. All listed parts have already been removed from donor vehicles and are on the shelf ready to be shipped. Engine Mounts. This MUST be specified AT TIME OF PURCHASE.

part #: 42749057 prices

• $46.55-$51.34

specifications engimou:

• for makes: Chevrolet
• for years: 2017-2023
• mpn: 42749057
• location: Nwah8f4
• listed: Um53
• type: Engine Mount
• material: Aluminum

seller engimou:

• # reviews: 77298
• city: Nicholasville, Kentucky
• rating: 100.0%

returns engimou:

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

payments engimou:

• wallet: Paypal
• credit card: Visa
• other

general engimou:

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

offer engimou:

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

shipping engimou:

• service: Standard
• class: Standard
• type: Fixed
• transit: 3-6 Days
• cost: $0.00

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