One of the most common questions Black Series owners ask is simple: will this part fit my model? Across the HQ range — HQ12, HQ15, HQ17, HQ19, HQ21/HQ21 Balcony (HQ21B), and the TH19 and TH22 toy haulers — some parts are shared and some are model-specific. This guide breaks it down by category so you can order with confidence.
Jump straight to your model: HQ12 · HQ15 · HQ17 · HQ19 & TH19 · HQ21 & HQ21B · TH22. Or browse the full Black Series parts hub.
Why fitment matters on Black Series trailers
Black Series builds several floorplans and has revised components across production years. Two trailers that look similar can use different window sizes, door dimensions, or cabinet hardware. The safest approach is always to match a part to both your model and your model year, and to measure before you buy.
Shared vs model-specific: a category guide
| Part category | Generally shared? | What to check |
|---|---|---|
| Suspension, brakes, hubs | Often shared | Independent suspension components are common across models; confirm axle/rating |
| Windows | Size-specific | Measure the opening (mm) - sizes vary by model and year |
| Entrance & storage doors | Size-specific | Match dimensions and hinge side |
| Electrical, solar, 12V | Mostly universal | Most Victron and 12V gear fits any model |
| Appliances (fridge, A/C, heater) | Often shared | Confirm cut-out size and voltage |
| Interior furniture & cabinetry | Model-specific | Depends on floorplan - varies most across models |
| Water pumps, tanks, fittings | Often universal | Confirm tank size/fitting type |
How to identify your model and year
- Check the compliance/VIN plate on the trailer (usually on the A-frame or door jamb).
- Note the model code (e.g. HQ19) and the build year.
- For size-specific parts, measure the existing component before ordering.
- Still unsure? Send us your VIN and a photo and we'll confirm the right part.
Universal upgrades that fit any HQ
Electrical and off-grid power gear is the most cross-compatible category. A Victron inverter/charger, lithium batteries, or solar charge controllers will work on essentially any Black Series build — see our MultiPlus vs Quattro guide to choose.
Frequently asked questions
Are HQ19 and TH19 (formerly HQ19T) parts the same?
Not entirely. The TH19 is a toy hauler with its own floorplan, so interior, furniture, cabinetry, and some body parts differ from the HQ19. Running-gear and hardware parts may overlap — confirm on the product page or send us your VIN.
Can I use an HQ21 window on an HQ17?
Only if the measured dimensions and shape match. Go by the size on the product page, not the model name.
What's the most cross-compatible category?
Electrical, solar, and 12V power — most of it fits any HQ model regardless of year.
Find your model's parts: HQ12, HQ15, HQ17, HQ19, HQ21, TH22. Ships from Upland, CA.
Shop the parts in this guide
- Black Series Silver Trailer Cover for HQ12, HQ15, HQ17, HQ19, HQ21
- Black Series OEM Two-Door RV Refrigerator with Freezer
- Black Series OEM 12V Single-Door RV Refrigerator
- RV Bathroom Basin Faucet, Brushed Finish
Standard shipping is free to the contiguous U.S. on most items (Black Series replacement parts and freight/oversized items are excluded), and eligible returns are accepted within 30 days with no restocking fee. Found it cheaper? We'll beat it.