1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Dee Zee DZ3700303 3-Inch Round Universal Nerf Bars. These tubular side steps are designed to provide a convenient and secure stepping surface for your vehicle. Please read these instructions thoroughly before beginning installation to ensure safety and optimal performance.

Image 1.1: A single Dee Zee DZ3700303 3-inch round universal nerf bar, showcasing its polished stainless steel finish and black molded step pad.
2. Safety Information
WARNING: Installation of these nerf bars requires drilling into the vehicle frame. Improper installation can lead to serious injury or damage to the vehicle. If you are not confident in your ability to perform this installation, seek professional assistance.
- Always wear appropriate personal protective equipment, including safety glasses, during installation.
- Ensure the vehicle is securely supported on a level surface before beginning work.
- Verify all components are present and undamaged before installation.
- Do not overtighten fasteners, as this can strip threads or damage components. Refer to torque specifications if provided in the full PDF manual.
- Keep children and pets away from the work area.
CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
3. Package Contents
Carefully unpack all items and compare them with the list below. If any parts are missing or damaged, contact Dee Zee customer support immediately.
- Dee Zee 3-Inch Round Universal Nerf Bars (2)
- Mounting Brackets (various pieces)
- Installation Hardware (bolts, nuts, washers)

Image 3.1: All components included in the Dee Zee DZ3700303 nerf bar package, showing two nerf bars, various mounting brackets, and a bag of hardware.
4. Specifications
| Feature | Detail |
|---|---|
| Model | DZ3700303 |
| Material | Stainless Steel |
| Exterior Finish | Polished Stainless Steel |
| Dimensions (L x W x H) | Approximately 44 x 26 x 5 inches (packaged) |
| Item Weight | Approximately 0.01 ounces (product weight, likely an error in source data, actual weight will be higher) |
| Design | 3-inch Round Tubular Side Step |
| Step Pads | Molded Plastic, Non-Skid |
| Mounting | Frame Mounted (drilling required) |
| Fitment | Universal (32 inches long) |
5. Setup and Installation
The Dee Zee DZ3700303 Nerf Bars are designed for universal fitment, which typically requires drilling into the vehicle's frame for secure, frame-mounted installation. This process ensures maximum strength and stability.
Required Tools (Not Included):
- Drill and appropriate drill bits for metal
- Wrenches or socket set
- Measuring tape
- Level
- Marker or punch
- Safety glasses and gloves
General Installation Steps:
- Preparation: Park the vehicle on a level surface and engage the parking brake. Gather all tools and components.
- Positioning: Temporarily position one nerf bar along the side of the vehicle to determine the optimal mounting locations on the frame. Ensure it is level and provides adequate clearance. Mark the drilling points.
- Drilling: Carefully drill pilot holes, then enlarge them to the required size for the mounting hardware. Be aware of any existing lines or components within the frame that could be damaged during drilling.
- Mounting Brackets: Attach the mounting brackets to the vehicle frame using the provided hardware. Do not fully tighten at this stage.
- Attach Nerf Bar: Secure the nerf bar to the installed mounting brackets.
- Alignment and Tightening: Adjust the nerf bar for proper alignment and levelness. Once satisfied, fully tighten all bolts to secure the assembly.
- Repeat: Perform the same steps for the other side of the vehicle.
For detailed, step-by-step instructions and diagrams, please refer to the official PDF user manual available on the product page or Dee Zee's website. Professional installation is recommended for optimal safety and fitment.

Image 5.1: A Dee Zee nerf bar installed on the side of a truck, demonstrating its appearance and position relative to the vehicle.
6. Operating (Usage)
Once properly installed, your Dee Zee Nerf Bars provide a stable step for easier entry and exit from your vehicle. To use:
- Step onto the molded plastic step pad. The non-skid surface is designed to provide traction.
- Ensure your footing is secure before transferring your weight.
- Avoid placing excessive weight on the nerf bars beyond their intended use as a step.

Image 6.1: A close-up view of the Dee Zee molded plastic step pad, featuring the brand logo and textured surface for enhanced grip.
7. Maintenance
Regular maintenance will help preserve the appearance and functionality of your nerf bars.
- Cleaning: Clean the stainless steel finish regularly with mild soap and water. Avoid abrasive cleaners or harsh chemicals that could damage the finish.
- Inspection: Periodically inspect all mounting hardware for tightness. Retighten any loose bolts to ensure the nerf bars remain securely attached to the vehicle frame.
- Damage Check: Check for any signs of damage, corrosion, or wear on the nerf bars and step pads. Replace damaged components as necessary.
8. Troubleshooting
If you encounter issues with your Dee Zee Nerf Bars, consider the following:
- Fitment Issues: These are universal fit nerf bars. While designed to fit a wide range of vehicles, some custom modification or professional installation may be required for optimal fitment on certain models. Refer to the full PDF manual for specific vehicle compatibility or consult a professional installer.
- Loose or Rattling: Check all mounting bolts and ensure they are securely tightened. Over time, vibrations can cause fasteners to loosen.
- Corrosion: Although made of stainless steel, prolonged exposure to harsh elements or chemicals can cause surface corrosion. Regular cleaning and waxing can help prevent this.
9. Warranty and Support
For information regarding product warranty, returns, or technical support, please refer to the official Dee Zee website or contact their customer service department directly. Keep your purchase receipt as proof of purchase.
Dee Zee Contact Information:
- Website: www.deezee.com (or search for Dee Zee official website)
- Customer Service: Refer to the website for current contact methods (phone, email, support forms).
10. Legal Disclaimer
The information provided in this manual is for general guidance only. Dee Zee, Inc. is not responsible for any damage or injury resulting from improper installation, misuse, or modification of the product. Always adhere to local laws and regulations regarding vehicle modifications.







