The parts that strand people are never the expensive ones. Nobody gets stuck because a MultiPlus failed. They get stuck because a $12 fuse blew 200 miles from a hardware store, or a hitch pin walked out on a corrugated road.
This is the kit we tell every HQ owner to build. It fits in one ammo can and a small box. Total cost is less than one night in a motel while you wait for a part to ship.
1. Window struts (one pair)
Gas struts on off-road camper windows fail without warning. They lose pressure slowly, then one day the window will not stay open, and the next windy day it slams shut and cracks the acrylic. Carry one pair of the most common size on your camper. On most HQ models that is the strut for the main side windows. Check the window size chart to confirm which strut fits which opening. Swapping one takes five minutes with a flat screwdriver.
2. Door lock and latch
A camper you cannot lock is a camper you cannot leave. Entry door locks on off-road campers take a lot of vibration, and the internal latch spring is the usual failure. Carry a complete lock and latch assembly, not just a cylinder. If the key starts binding or the handle goes soft, the door lock troubleshooting guide tells you whether it is the cylinder, the latch, or the strike plate.
3. Hitch pin and clip
The cheapest part on this list and the one that ends the most trips. Corrugations vibrate R-clips loose, and once the clip is gone the pin follows. Carry two pins and four clips for the Y-hitch receiver, plus a spare pin for the DO35 or DO45 coupler. Use a locking hitch pin for the receiver and keep the plain one as the spare.
4. Water filter cartridge
You are going to fill from a campground spigot, a creek, or a stranger's hose bib at some point. A clogged inline filter drops water pressure to a trickle and starves a tankless heater of the flow it needs to ignite. Carry one cartridge and swap it the first time the shower goes weak.
5. Fuses and a spare breaker
A full blade-fuse assortment, 5 A through 30 A, plus one spare of every breaker in your 12 V panel. Take a photo of the panel with the cover off so you know what you have. Add a couple of MIDI or ANL fuses if your Victron system uses them between the battery and the MultiPlus or MPPT. A blown battery fuse takes down everything, and it is never a size the auto parts store carries.
6. CO detector
Not a spare, exactly. A backup. Camper CO detectors have a hard expiry date, typically five to seven years from manufacture, and they fail silently. Carry a battery-powered unit in the kit. If the fitted detector chirps or fails its test, you have a working one that night instead of choosing between no heat and no alarm.
7. Hose clamps
A dozen stainless worm-drive clamps in three sizes. They fix a water line, a drain hose, a loose fill neck, a split gray tank hose, and about forty things that have nothing to do with plumbing. Add a foot of silicone hose and a roll of self-fusing tape and you can hold a water system together to the next town.
8. Folding stabilizer leg
Stabilizer legs live at the corners, closest to the ground, and they take the hits. A bent or seized leg means a camper that rocks all night or a leg you cannot retract for the drive home. Carry one complete folding leg with mounting hardware. It is one of our best sellers for exactly this reason, and it is the same part across most HQ models.
9. Fridge vent fan
Compressor fridges on off-road campers depend on airflow through the rear vent. When the fan dies in July, the fridge stops keeping up by noon, and you find out when the food spoils. Carry a spare 12 V vent fan. They are small, cheap, and take ten minutes to swap with a screwdriver and two spade connectors.
10. Quick-connect couplers
The brass and plastic quick-connects on your city water inlet, outside shower, and drain hose crack when stepped on, dropped, or left in the sun. Carry one male and one female of each type you use. Include a spare inlet cap for the city water fitting. A missing cap lets dust into the check valve, and a stuck check valve is how a tank overflows into the cabin.
The rest of the kit
Not spares, but do not leave without them: a tire plug kit and a compressor, a multimeter, a roll of 12 V wire with crimp connectors, a tube of sealant, dry silicone spray, marine grease, zip ties, and a spare set of camper keys hidden on the tow vehicle.
Buy it as a kit
Everything on this list is in stock in Upland, CA and ships free on most orders. Email support@rvpartsgiant.com with your HQ model and we will put together a spares order that matches your camper, or browse the spares-to-carry kit, Black Series parts and best sellers. 30-day returns on anything you ordered wrong.