VWD Sprinter Passenger Rear Quarter Bump-Out Extension | SR1034-EXT

Now includes an exclusive VWD window ring

VWD bump-outs now come with an exclusive window mounting ring for easier installation on fiberglass bump-outs. The adjusted 6mm depth replaces the standard 3mm-depth ring. Your included VW3310L/R slider comes with CR-VW3310-EXT; choosing the AG3310-EXT awning upgrade replaces it with CR-AG3310-EXT. The matching ring is included at no additional charge.

Sprinter Passenger Side Rear Quarter Bump Out Extension | VWD SR1034-EXT (2007-2027)

The VWD SR1034-EXT adds real usable width to the Sprinter passenger-side rear quarter. Built for 2007-2027 Sprinter 144 and 170 wheelbase vans. Matte black fiberglass, integrated 12V LED light bar, and an included VWD half-slider bunk window. Optional upgrade available to an all-glass awning window. Fitment notes apply due to sliding door clearance.

Key Features

• Rear quarter bump out extension for Sprinter van conversions
• Matte black fiberglass finish
• Integrated 12V LED light bar with pig-tail wiring
• Includes VWD Half-Slider Bunk Window standard
• Optional upgrade: All-Glass Awning Window (fitment notes apply)
• Designed to add usable interior width for smarter layouts
• 1 year warranty

Fitment

• Vehicle: Mercedes-Benz Sprinter Van
• Years: 2007-2027
• Roof: Low roof or high roof
• Wheelbase: 144, 170
• Position: Passenger Side Rear Quarter

Technical Specifications

Installation

Read the instructions before you cut. Measure twice. Cut once. Use the official VWD Sprinter Bump Out Installation Instructions (PDF) for measurements, layout, and install steps.

FAQ

Can I use SR101-AW, SR101-DS, or SR101-CA with the SR1034-EXT bump-out?

These sliding-door windows are not recommended for straightforward installation with the SR1034-EXT passenger-side bump-out because their screen/shade assemblies or inner frames can reduce clearance. On 144" wheelbase Sprinters, and in some cases 170" wheelbase Sprinters, sliding-door bracket extensions, sliding-track spacers, and/or additional modifications may be required. Dry-fit the actual window and bump-out and check full sliding-door travel before bonding or final installation.

Which sliding-door windows are recommended for out-of-the-box installation with SR1034-EXT?

Choose SR101-F, SR101-SE, SR101-SES, or SR101-SER for out-of-the-box installation with the SR1034-EXT bump-out. Confirm the exact van configuration and dry-fit the parts to verify full sliding-door travel and clearance.

Is it normal to see small gaps when dry-fitting a fiberglass bump-out?

Yes. Bump-outs are made from hand-laid fiberglass, so minor contour variations and small dry-fit gaps can occur. Check the panel alignment and bonding-flange contact around the perimeter. The finished installation needs a continuous adhesive bond with the thickness specified in the installation guide; do not squeeze the adhesive down to zero thickness. Read the bump-out installation guide before cutting or bonding.

How can I clamp the bump-out during installation?

A little preparation makes installation easier: dry-fit the bump-out and have your supports and clamps ready before applying adhesive. Padded C-clamps can be used from the inside where accessible, and suction clamps can help hold the front portion of the bump-out from the exterior. The VWD 6pc Window Installation Clamp Set (VWD6CLMPB) is also a convenient optional add-on when ordering any of the four 1034 bump-out packages. C-clamps are separate tools and are not included in the 6-piece suction clamp set.

Attach suction cups only to clean, smooth, nonporous surfaces, seat the cups first, then adjust the bridges gently. Protect finished surfaces, maintain the adhesive manufacturer's required bond-line thickness, and use only light, even pressure. Clamps should support a properly dry-fitted part; do not use them to force a poor fit, squeeze out the adhesive, or lift the bump-out. Contact VWD with photos if the flange needs excessive force to sit correctly.

How long should the bump-out stay taped or clamped?

Leave the bump-out taped and/or clamped in its verified installed position for at least 24 hours. Follow the adhesive manufacturer’s cure requirements and keep it secured longer if the specified cure time or installation conditions require it. Maintain a continuous bond and the specified adhesive thickness. Allow the required cure before loading or water-testing the installation.

What should I send VWD if I am unsure about bump-out fitment or gaps?

Send wide-angle photos of the full bump-out, close-ups of the gaps with measurements, and photos showing both the unclamped fit and the final dry fit with clamps installed. Include your van’s year, wheelbase, bump-out SKU, and sliding-door window SKU. Contact VWD before cutting or bonding so the team can review the fit and recommend next steps.

What vehicles does this bump out fit?

Mercedes-Benz Sprinter van model years 2007-2027. Fits 144 and 170 wheelbases. Low roof or high roof. Passenger side rear quarter position.

What is included with the passenger side rear quarter extension?

Matte black fiberglass passenger side bump-out with an integrated 12V LED light bar and pig-tail wiring. A VWD Half-Slider Bunk Window is included standard. Optional upgrade available to an All-Glass Awning Window (fitment notes apply).

Are there fitment notes for the all-glass awning window upgrade?

Yes. The all-glass awning upgrade is not recommended for some layouts due to potential contact with the passenger-side sliding door. Confirm your configuration before selecting the upgrade.

Where can I find measurements and cut details?

Use the VWD Sprinter Bump Out Installation Instructions (PDF). It provides the most accurate layout and cut details for installation.