Does a BYD Frunk Affect Heat or Airflow?
A Practical Guide for BYD ATTO 2, ATTO 3 and SEAL U Owners
A frunk, also called a front trunk, adds useful storage space under the bonnet of an electric vehicle.
It is a practical place for charging cables, emergency equipment, cleaning products and other everyday items.
However, many BYD owners ask important questions before installing one:
- Can a frunk increase the temperature under the bonnet?
- Can it block airflow?
- Does the empty area above the electric components need to stay open?
- Can a frunk affect the cooling system?
- Is drilling or cutting required?
- Is installation different for each BYD model?
These are valid questions.
A frunk should not be treated as a universal plastic box. It must be designed for the exact vehicle model, available space, original mounting points and surrounding components.
This guide explains how a vehicle-specific frunk works on the BYD ATTO 2, BYD ATTO 3 and BYD SEAL U.
What Is a BYD Frunk?
A BYD frunk is a storage compartment installed in the unused area under the bonnet.
The word “frunk” combines “front” and “trunk.” It is also commonly called:
- Front trunk
- Front boot
- EV front storage
- Under-bonnet storage
Not every BYD model comes with a factory-installed front trunk. A vehicle-specific aftermarket frunk can use this available space and create practical additional storage.
The important point is that the frunk must be developed for the specific vehicle.
A BYD ATTO 2 frunk should not be assumed to fit a BYD ATTO 3. A BYD SEAL U frunk also has its own shape, mounting system and available space.
Does a Frunk Cause More Heat?
The area under the bonnet of an electric vehicle can become warm during driving, charging and hot weather.
This is normal.
Electric vehicles contain components such as:
- Electric drive systems
- Inverters
- Charging equipment
- Coolant hoses
- Electrical cables
- Cooling system connections
These systems create or manage heat during normal vehicle operation.
A correctly designed frunk should maintain suitable clearance from the surrounding components. It should not rest directly on electrical parts, hoses or connectors.
The frunk must also remain stable while the vehicle is moving.
The objective is not simply to create the largest possible storage box. The objective is to use the available space without interfering with the vehicle’s original layout.
Does a BYD Frunk Block Airflow?
A common concern is that a frunk may block the movement of air under the bonnet.
A vehicle-specific frunk must be shaped and positioned so that it does not cover important air paths, cooling areas or service points.
The design should consider:
- Air inlet and outlet areas
- Clearance around electrical components
- Coolant hoses and connectors
- Original vehicle brackets
- Bonnet closing clearance
- Access required for servicing
- Movement and vibration during driving
This is one of the main differences between a properly developed frunk and a universal storage box.
A universal box may physically fit into the available space, but this does not mean that it is suitable for the vehicle.
Does the Space Above the Inverter Need to Stay Completely Empty?
Some BYD owners notice an open space above the inverter or other electrical components and assume that this complete area must remain empty for cooling.
Electric vehicle thermal management is more complex than simply leaving one large empty area under the bonnet.
However, this does not mean that every available space can be filled.
A frunk still needs to maintain the correct distance from:
- Electrical components
- Cooling connections
- Cables
- Hoses
- Moving parts
- Hot surfaces
- Service access areas
The frunk must therefore be developed around the vehicle’s technical layout, rather than forcing a standard box into the compartment.
BYD ATTO 2 Frunk
The BYD ATTO 2 has useful space under the bonnet that can be converted into practical front storage.
The MUSTECH BYD ATTO 2 frunk is developed specifically for the European BYD ATTO 2 battery-electric vehicle.
Its shape follows the available under-bonnet area and is designed to remain securely positioned using the intended mounting locations.
The frunk can be used for items such as:
- Charging cables
- Vehicle cleaning products
- Emergency equipment
- Shopping bags
- Shoes
- Small travel items
The BYD ATTO 2 frunk is installed without drilling, cutting or making permanent changes to the vehicle.
For full specifications, compatibility details and installation information, visit the BYD ATTO 2 frunk product page.
BYD ATTO 3 Frunk
The BYD ATTO 3 has different under-bonnet configurations depending on the vehicle version and production details.
Some BYD ATTO 3 vehicles have open factory mounting holes on both sides. Other vehicles may have closed mounting areas on one or both sides.
This difference is important before ordering.
When the original mounting holes are available, the MUSTECH BYD ATTO 3 frunk can be installed using the supplied fixing parts.
When the mounting holes are closed, the specially developed BYD ATTO 3 Installation Kit is required.
The installation kit allows the frunk to be mounted without:
- Drilling the vehicle
- Cutting vehicle parts
- Making permanent modifications
- Removing important original components
Before ordering, owners should inspect the mounting areas shown in the product photos and installation guide.
Separate installation videos are available for vehicles with open mounting holes and vehicles requiring the installation kit.
See the BYD ATTO 3 frunk and the BYD ATTO 3 Installation Kit for complete compatibility and installation details.
BYD SEAL U Frunk
The BYD SEAL U has a different front compartment layout from the ATTO 2 and ATTO 3.
For this reason, it requires its own model-specific frunk.
The MUSTECH BYD SEAL U frunk is shaped for the available front storage area and designed around the vehicle’s original compartment layout.
It provides an organised space for everyday vehicle items while keeping the installation removable.
Owners should always check the exact vehicle and powertrain compatibility shown on the product page before ordering.
See the BYD SEAL U frunk product page for specifications, compatibility and installation information.
Is BYD Frunk Installation Difficult?
MUSTECH frunks are designed to use the vehicle’s existing structure and mounting areas wherever possible.
Depending on the model, installation normally uses:
- Original vehicle clips
- Supplied fixing clips
- Existing mounting holes
- Model-specific brackets or fixing parts
No drilling or cutting should be required when the correct product and installation method are used.
Each model has its own installation video because the mounting system and available space are different.
Owners should follow the video for their exact vehicle model and version.
Can the Frunk Be Removed Later?
Yes.
A correctly installed frunk uses removable fixing parts. It can therefore be removed when access is required for servicing, inspection or maintenance.
After servicing, it can be installed again using the correct mounting procedure.
This is an important advantage compared with installations that require drilling, adhesives or permanent changes to the vehicle.
What Can Be Stored in a Frunk?
A frunk is suitable for many normal vehicle and travel items.
Recommended examples include:
- Charging cables
- Warning triangle
- Emergency equipment
- Cleaning products
- Shopping bags
- Shoes and boots
- Small tools
- Travel accessories
However, the area under the bonnet is not temperature controlled.
Do not use the frunk to store:
- Animals
- Food that must remain cold
- Temperature-sensitive medicine
- Flammable liquids
- Pressurised containers
- Items that may be damaged by heat
- Items above the stated load limit
Always follow the product’s stated load capacity and usage instructions.
Why Material and Fit Matter
A frunk is exposed to temperature changes, vehicle vibration and regular loading.
It therefore needs to be made from a suitable material and remain securely mounted.
MUSTECH frunks are produced from automotive-grade ABS material selected for strength, stability and practical everyday use.
However, material alone is not enough.
A good frunk must combine:
- Suitable material
- Correct vehicle-specific geometry
- Secure mounting
- Proper component clearance
- Easy removal
- Practical storage capacity
- Clear installation instructions
Why Choose a Model-Specific BYD Frunk?
Different BYD vehicles may have different:
- Mounting points
- Electrical component positions
- Coolant reservoirs
- Cables and hoses
- Bonnet clearances
- Service access requirements
- Production variations
A model-specific frunk is developed around these details.
This provides a more secure and predictable installation than using a universal box that was not designed for the vehicle.
MUSTECH currently offers dedicated front trunk solutions for:
- BYD ATTO 2
- BYD ATTO 3
- BYD SEAL U
Each product has its own shape, mounting components and installation instructions.
Frequently Asked Questions
Is a frunk safe for a BYD electric vehicle?
A vehicle-specific frunk should be installed according to the product instructions and should maintain suitable clearance from surrounding components.
Always use the product developed for your exact BYD model.
Does a frunk affect the vehicle warranty?
The installation does not require drilling, cutting or permanent vehicle modification when the correct MUSTECH mounting solution is used.
Vehicle warranty conditions can differ by country and vehicle provider. Owners should check their own warranty terms when necessary.
Can I install a BYD frunk myself?
The products are designed for straightforward installation using basic hand tools and supplied fixing parts.
Installation videos are available for each model.
Does the frunk block cooling air?
A model-specific frunk is designed around the available compartment and intended component clearances.
It should always be installed exactly as shown in the product instructions.
Can I install the same frunk in different BYD models?
No.
The BYD ATTO 2, BYD ATTO 3 and BYD SEAL U have different front compartment layouts. Each vehicle requires its own compatible frunk.
Does every BYD ATTO 3 need the installation kit?
No.
The kit is only required when the relevant factory mounting holes are closed or unavailable. Check your vehicle before ordering.
Find the Correct Frunk for Your BYD
The safest and most practical solution is to select a frunk designed for your exact model and follow the correct installation procedure.
Explore the available MUSTECH solutions:
MUSTECH frunks are developed for European vehicle versions and shipped from within Europe.
Before ordering, check the compatibility information and mounting details provided on the relevant product page.