How to Replace a Black Series RV Window (HQ12-HQ22T Size Guide)

A cracked or fogged window is one of the most common repairs on a Black Series off-road trailer — sun, vibration, and rock strikes all take their toll. The good news: replacing one is a job most owners can do in an afternoon, as long as you order the right size. This guide covers how Black Series windows are built, how to measure for a replacement across the HQ12 through HQ22T range, and how to fit it.

Ready to order? Shop Black Series replacement windows by size, or the full range of doors, covers & skylights.

How Black Series windows are built

Most Black Series trailers use acrylic double-pane windows with a built-in fly screen and pull-down privacy/blackout shade in a single integrated frame. They're hinged at the top and held open by gas struts. Because the screen and shade are part of the unit, you typically replace the complete window assembly rather than just the glass.

Measuring for the right size

This is the step that matters most. Black Series uses several window sizes across its models, and dimensions are listed in millimetres (width x height).

1. Measure the cut-out opening or the existing frame, width first, then height.
2. Note whether it's a side, bathroom, or rear window — shapes vary.
3. Match those dimensions to the size listed on each product page (e.g. 300x700mm, 450x500mm, 550x1100mm).
4. Confirm your model and model year — Black Series has revised window sizes across production runs.

Browse exact-fit options on the replacement windows collection — each listing shows the dimensions and compatible models.

Step-by-step: replacing the window

1. Support the window from outside so it can't fall once unbolted.
2. Remove the interior trim ring — usually a series of screws around the inner frame.
3. Separate the frame halves. The window clamps the wall between an outer frame and the inner trim ring.
4. Lift the old unit out from the outside and clean the opening of old sealant.
5. Apply fresh sealant (butyl tape or the manufacturer-specified sealant) around the new window's flange.
6. Seat the new window, refit the inner trim ring, and tighten the screws evenly — snug, not over-torqued, to avoid cracking the frame.
7. Test the latch, screen, shade, and struts, then check for leaks with a hose.

Don't forget the seals and struts

While the window is out, inspect the rubber seal and the gas struts that hold it open — both are common wear items. Replacement window struts and gas lift supports are sized for Black Series HQ models.

Frequently asked questions

Can I replace just the glass on a Black Series window?

Usually no — the acrylic pane, fly screen, and shade are integrated into one frame, so you replace the complete assembly. This also gives you fresh seals and a working screen/shade.

How do I know which size I need?

Measure the existing frame or opening (width x height in mm) and match it to the dimensions on the product page. If you're unsure, send us a photo and your VIN and we'll confirm.

Will a window from another HQ model fit mine?

Only if the dimensions and shape match. Sizes are shared across some models but not all — always go by the measurement, not the model name. See our HQ parts compatibility guide.

Shop Black Series replacement windows, or see the full HQ19 parts guide for more common repairs. Ships from Upland, CA.