The Black Series HQ21 and bunk-equipped HQ21B are family-size off-road trailers - more space, more appliances, and bigger power and water systems to match. That means more components to service over time. Here's what HQ21 and HQ21B owners replace most.
Browse the full HQ21 & HQ21B replacement parts collection, shipped from Upland, California.
What HQ21 / HQ21B owners replace most
- Windows & seals - several sizes across the larger body; measure each. See replacement windows.
- Entrance & storage doors - doors, covers & skylights.
- Suspension, brakes & bearings - heavier trailer, so brakes and bearings matter; brakes, suspension, tyres & wheels.
- Appliances - larger fridge, A/C, water heater. RV appliances.
- Power & water - bigger systems; Victron, water systems.
Confirming fitment on an HQ21 or HQ21B
The HQ21 and HQ21B share most exterior and mechanical parts; interior items tied to the bunk floorplan can differ. Match by model year and measure size-specific parts. See the HQ compatibility guide.
Upgrades worth doing
Family rigs draw more power, so the highest-impact upgrade is a larger off-grid system - more lithium capacity, a capable Victron inverter/charger, and enough solar to keep up. See how to build a Victron system.
Frequently asked questions
What's the difference between HQ21 and HQ21B for parts?
Mostly the interior - the HQ21B's bunk layout changes some furniture and cabinetry. Exterior and mechanical parts are largely shared.
Where do HQ21 parts ship from?
Upland, California, with fast US shipping.
Shop HQ21 & HQ21B parts or the full Black Series hub. Ships from Upland, CA.