What to Look for When Buying a Used 5th Wheel (Checklist)

Buying a used 5th wheel trailer is an excellent way to save money and avoid the huge decrease in value a new RV sees immediately after towing it off the lot.

Did you know…
A new fifth-wheel trailer will typically lose 45% of its value in the first five years!

While buying a used 5th wheel has its perks, there are a few things you need to be mindful of so you don’t end up spending more money in the long run on repair costs.

So, here’s what to look for when buying a used 5th wheel RV, along with some important tips and a downloadable checklist to ensure you don’t miss anything.

Previous Maintenance

Maintenance history

The first step is to get a clear understanding of the trailer’s history. Just because it looks clean and well-kept doesn’t mean it was properly maintained or didn’t encounter other issues.

Ask the dealer or owner, depending on whether you are buying the camper from a lot or a private party, for any information or records about the vehicle’s past.

Unfortunately, you can’t just run a Carfax report on towable trailers to get the history.

Trailer Exterior Checklist

Exterior checklist
Pressure spray around windows and doors to test for leaks.

Now, let’s start the 5th wheel walkthrough, starting with the exterior of the recreational vehicle.

Roof

One of the most neglected inspection checkpoints is the roof, but it’s one of the most important!

Why? A leaking roof can cause all sorts of issues, including water damage, mold, rotting of the structure, etc. And when this happens inside the walls, it can be hard to catch in a timely manner, requiring expensive repairs.

Important: Inspect the ladder for damage before using it to get to the roof and use extreme caution while performing the inspection. 

Roof Inspection Checklist:

  • Check the roof for cracks and damage, especially along seams.
  • Inspect the caulking and other seals for drying out or cracking.
  • Check around the AC unit (if applicable), vent covers, solar panels, roof racks, etc., for cracks in the seals or the units themselves.
  • Remove any vent covers and check for blockages, for example, debris build-up, animal nests, etc.
  • Lastly, climb off the roof and spray it with a hose (ask the owner for permission first). Inspect any areas that pool water and inspect the camper’s interior for dripping.

Exterior Walls

Walk around the RV’s exterior and inspect for any damage, including tears, holes, cracks, delamination, etc. 

Stand at one end of the RV and peer down the side of it, looking for any malformation or bowing of the walls, which might signal a structural issue. Perform this step on the other side, ensuring the walls are level.

Windows and Doors

The windows and doors on an RV are another common entry point for moisture and are prone to other issues.

  • Check around the windows and doors for any dried, cracking, or shrinking seals. Spray down the 5th wheel’s exterior with a hose and inspect the windows and doors for leaks.
  • Check the screens for any tears or rips.
  • Make sure the windows and doors open and close properly.
  • Inspect for any missing screws or components.
  • Ensure both the windows and doors properly latch/lock.

Awnings

If applicable, open the awnings and ensure they roll out smoothly. Inspect the awning material for any tears or rips. 

Lastly, make sure the awning closes smoothly and securely locks in place.

Tip: Some fifth-wheels have multiple awnings, so be sure to check them all.

Slideouts

If your RV features slideouts, be sure to open them fully. Inspect the seals and any moving parts for damage or corrosion. 

If allowed, another spray test with your hose or pressure sprayer while the slideout is extended will help identify any water leaks.

Close the slideout and ensure it operates smoothly.

LP System

A PDI (pre-delivery inspection) is performed by the dealership before they sell an RV, which includes a propane system inspection. With a private party seller, you might not be afforded that luxury.

So, if you’re working with an RV dealer, ask for a signed PDI form. If you’re working with a private seller and they haven’t performed an inspection, ask that they have it done. Who pays for the inspection will just depend on how badly they want to sell it or how badly you want to buy it. You may even agree to split the cost.

Either way, we recommend a professional technician perform the propane system inspection.

Connections

Next, we want to check all the connections on the RV’s exterior, including the hitch, power connections, water tank hookups, and drains.

For towable RVs, like fifth-wheels, you will need to additionally inspect:

  • Lighting connectors
  • Brake controllers
  • Tire pressure monitoring system

Ensure they are all in good working order.

Undercarriage

Finally, you’ll want to look under the 5th wheel for any damage or wear and tear.

  • Check the axles, suspension, and other components for rust and corrosion.
  • Check the tires for proper pressure and the DOT code on the sidewall for the tire age to see if they need to be replaced. Unlike car tires, RV tires are often replaced due to age, as opposed to the amount of tread left (though it’s still a good idea to check the tread).

Trailer Interior Checklist

Interior checklist
Test all of the appliances and ensure they are in good working condition

Once you’ve completed the exterior checklist, it’s time to move inside the RV.

Electrical System

The electrical system is the heart of your RV, powering many essential components like your fridge, microwave, AC, lighting, entertainment devices, pumps, etc. 

So, it’s important to ensure the system runs properly, on both shore and battery power.

  • Start with the breaker box and make sure all of the switches are properly functioning and that none of them are tripped.
  • Test all of the RV’s electrical appliances and ensure they are receiving power and operating properly.
  • Test all of the lighting in the RV.
  • Test all of the electrical outlets to ensure they are receiving power.
  • Test any safety devices that may be hard-wired in.
  • If the RV has a battery bank, ensure the batteries are corrosion-free, have the proper voltage (around 12.6 volts), and check their age.

Water Damage and Mold

Water damage is one of the most common types of damage in a 5th wheel. And as we explained above, it can wreak havoc on your camper, leading to costly repairs.

Signs of water damage can include:

  • Brown spots on the ceiling
  • Bowed or bubbling ceiling
  • Warped walls or floors (especially around the shower and toilet)
  • Mold

Windows and Doors

If you didn’t check the windows from the inside while running through the exterior checks above, now’s the time to ensure they open and close properly, the cranks work, and they are sealed when shut.

Heating and Cooling System

Your RV’s heating and cooling systems help make it livable, especially in extreme temperatures. So, we want to make sure these are in good working order.

Checking the RV AC

Turn on the air conditioning unit and ensure cold air blows out of all the vents. Let it run for 20 to 30 minutes and listen for any weird noises or squeaks. Ensure the inside temperature of the RV is indeed cooling down.

Additionally, you’ll want to ensure:

  • There are no leaks around the AC unit
  • The filters are clean
  • The fan mode works

Checking the RV Furnace

Turn on the furnace and ensure it fires up properly. Again, listen for any weird squeaking and ensure warm air comes from the vents.

Plumbing System

The last thing you want is plumbing issues the first time you take your new RV out on the road! They aren’t fun to clean up, can be hard to diagnose, and can lead to water damage.

There are a few major components we’ll want to inspect, including:

  1. Tanks: Hook the 5th wheel up to city water and fill the freshwater tank. Ensure the tanks fill properly and aren’t leaking. Unhook from city water.
  2. Fixtures: Test all of the fixtures in the RV, including the faucets, shower, toilets, etc.
  3. Water pump: Ensure the water pump is working properly and all fixtures receive water.
  4. Water heater: Ensure that the water heater powers on and that hot water flows out of the faucets.
  5. Drains: Once all the above has been tested, ensure the tanks drain properly.

Appliances

Test all kitchen appliances and ensure they are in good working condition. This will include testing the air temperature in the refrigerator and freezer, testing all of the burners on the stove and temperature in the oven, etc.

Remember, some appliances may use electricity and gas, so test them in both modes.

Entertainment Components

Check the operation of any TVs, satellite dishes, audio systems, wifi routers, etc., and any remotes that operate these components.

Safety Devices

Test all the safety devices and alarms in the trailer, including gas, carbon monoxide, and smoke detectors.

Be sure there is at least one up-to-date and functioning fire extinguisher.

Generators

If the RV includes a generator, you’ll want to make sure the fluid levels are optimal and that it runs smoothly. Fire it up, let it run for a few minutes, and ensure it does what it’s designed to – provide power to your RV.

Everything Else

Lastly, visually inspect every little nook and cranny of the RV. Test storage cabinets, cupboards, and drawers, look for evidence of rodents, etc.

Buying a Used 5th Wheel Checklist

We put the above inspection checklist into a downloadable PDF and shareable infographic!

Click here to download a pdf version of our buying a used 5th wheel checklist. 

Buying used 5th wheel checklist

Looking to buy another type of RV? You might also be interested in:

Buying a Used 5th Wheel FAQs

What Questions Should I Ask When Buying a Used 5th Wheel RV?

A few important questions you should ask before buying a used travel trailer include:

  1. How many people previously owned the RV?
  2. Do you have the title for the camper?
  3. Do you have the previous maintenance records?
  4. Has the 5th wheel been in any major accidents?
  5. Where was the trailer stored when not in use?
  6. Is there any warranty left on the trailer?
  7. Can I extend the warranty?
  8. How much does the trailer weigh?

Combining these questions with the used RV checklist above is an important step in getting the information you’ll need to make the right buying decision.

How Long Will a 5th Wheel Last?

A 5th wheel can last anywhere from 10 – 30 years or longer, depending on how well it’s taken care of. You can extend a 5th wheel trailer’s life with proper storage, maintenance, and care.

How Can I Buy a 5th Wheel RV Without Getting Ripped Off?

To buy a 5th wheel RV without getting ripped off, you should buy it at the right time (typically in fall), properly inspect the RV (or have it professionally inspected), and consider buying used to avoid the initial depreciation hit.

Check out our guide on how to buy an RV without getting ripped off for ten insider tips to protect yourself and pay the lowest price possible. Plus, find out how much a 5th wheel costs to better understand the RV’s value before hitting the bargaining table.

Camper FAQs is reader-supported. Buying through links on our site may earn us an affiliate commission. As an Amazon Associate I earn from qualifying purchases.

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