RV Repair & Service for Arnold, MO

Arnold sits in northern Jefferson County — one of the strongest RV markets south of St. Louis. Families in Arnold, Imperial, Barnhart, and Pevely are serious about their camping. Between the Meramec River, the nearby state parks, and quick access to I-55 heading south to the Ozarks, this area has one of the densest concentrations of travel trailers and fifth wheels in the metro.

3R RV Service Center is just 35 minutes west of Arnold in Union, MO. We're closer than most people think — take Highway 141 to I-44 West, or cut across on Highway 30 to Highway 50. No fighting city traffic, no dealing with the big-box dealer service departments. Just a family-owned shop with RVTI Level 4 Master Certified technicians who specialize in exactly what Jeff County RV owners need.

Jefferson County Loves Trailers and Fifth Wheels

We see a lot of trailers and fifth wheels from the Arnold and Jeff County area — Jayco, Heartland, Grand Design, Forest River, Keystone. These are the rigs that families tow to campgrounds every weekend from April through October. And we specialize in them — including brakes and suspension service for trailers and fifth wheels that most RV shops farm out.

What We Do

  • Roof repair and full replacement — all materials
  • Water damage restoration — floors, walls, delamination
  • Electrical diagnostics — 12V, 120V, inverter, solar
  • Slide-out repair, alignment, and seal replacement
  • Brakes and suspension — trailers and 5th wheels
  • Onan generator service — certified
  • Aqua-Hot heating — certified
  • Appliance repair — refrigerators, furnaces, water heaters, A/C
  • Plumbing system repair
  • Awning repair and replacement
  • Complete RV renovation and remodels
  • Horse trailer repair and service
  • Full parts department — OEM and aftermarket
  • Secure RV storage

Factory Authorized

Newmar, Tiffin, Keystone. All other manufacturers serviced.

Getting Here from Arnold

Take Highway 141 to I-44 West, exit Highway 50 in Union. Or Highway 30 West to Highway 50. About 35 minutes. 7819 Highway 47 S, Union, MO 63084

Call us at (636) 583-2244 or Book an Appointment online.