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Seismic 4212 | Toy Hauler Fifth Wheel

We have 0 4212 available
Key Features
  • Bath and a Half
  • Sleeps 8
  • 15725 lbs Dry Weight
  • Loft
  • 45 ft 1 in Length
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Sleeps 8
Slides 2
Length 45 ft 1 in
Ext Width 8 ft 6 in
Ext Height 13 ft 3 in
Interior Color Modern Farmhouse, Cashmere Cottage
Exterior Color Polar White, Metallic Ice, Velocity Blue
Hitch Weight 3480 lbs
Gross Weight 20695 lbs
Dry Weight 15725 lbs
Cargo Weight 4970 lbs
Fresh Water Capacity 102 gals
Grey Water Capacity 87 gals
Black Water Capacity 87 gals
Tire Size 16"
Furnace BTU 45000 btu
Generator 5,500 Watt Onan
Fuel Capacity 60 gals
Number Of Bunks 1
Available Beds Queen
Refrigerator Type 2 Way w/Ice Maker
Refrigerator Size 18 cu ft
Convection Cooking Yes
Cooktop Burners 3
Number of Awnings 2
Axle Weight 7000 lbs
Garage Size 11 ft 8 in
LP Tank Capacity 30 lbs
Water Heater Capacity 10 gal
Water Heater Type Quick Recovery DSI Gas/Electric
AC BTU 30000 btu
TV Info LR 50" TV, BR 32" TV, Ext. TV
Awning Info 10' and 20' Power w/LED Lights
Axle Count 3
Washer/Dryer Available Yes
Number of LP Tanks 2
Shower Type Standard

Jayco Seismic toy hauler 4212 highlights:

  • Two Full Baths
  • Raised Patio
  • Master Suite
  • 11' 8" Separate Garage
  • Loft
  • Fireplace


When you're ready to upgrade your RV to a unit with more at-home features and interior space, choose this toy hauler and you can't go wrong. The separate 11' 8" garage includes its own exterior entry door, full bath, and a loft above for the kids. The queen HappiJac bed with dual convertible sofas below will be great for guests and you'll love the front master suite for you and your spouse. You'll have access into the dual entry bath, a walk-around queen bed, and a large walk-in closet. You can spend your evening outdoors since this model features a side patio with an exterior TV, two power awnings and you have the option to add the rear patio as well!


With any Jayco Seismic toy hauler fifth wheel you will appreciate the wide body structural steel I-beam construction, and the Magum Truss XL6 roof system, the strongest in the industry that will allow you to enjoy your RV for years to come. Each model features LED high-intensity ramp lights for easy loading and unloading, D-rings mounted to the steel frame to keep your toys secure, and a two inch block-foam insulated garage door to keep you comfortable in any weather. Inside, these models include a SuperSofa with heat, massage, and LED lighting, Shaw "Wood Plank" vinyl flooring, a central vacuum system, and the JAYCOMMAND Smart RV system that allows you to control many functions of your RV right from your smartphone or tablet. 

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  1. Seismic 3512 Floorplan Image Zoom

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    Kitchen Island, Bath and a Half, 41 ft 9 in in length, weighs 13970 lbs lbs, sleeps up to 8, 3 slides, many colors ...more

  2. Seismic 3815 Floorplan Image Zoom

    Seismic 3815

    Kitchen Island, Bath and a Half, 44 ft 10 in in length, weighs 14705 lbs lbs, sleeps up to 8, 3 slides, many colors ...more

  3. Seismic 4013 Floorplan Image Zoom

    Seismic 4013

    Loft, Two Entry/Exit Doors, 45 ft 9 in in length, weighs 15205 lbs lbs, sleeps up to 8, 2 slides, many colors ...more

  4. Seismic 4113 Floorplan Image Zoom

    Seismic 4113

    Bath and a Half, Loft, 45 ft 8 in in length, weighs 15915 lbs lbs, sleeps up to 8, 2 slides, many colors ...more

  5. Seismic 4114 Floorplan Image Zoom

    Seismic 4114

    Bunkhouse, Loft, 45 ft 0 in in length, weighs 15800 lbs lbs, sleeps up to 9, 3 slides, many colors ...more

  6. Seismic 4125 Floorplan Image Zoom

    Seismic 4125

    Outdoor Kitchen, Loft, 45 ft 8 in in length, weighs 14970 lbs lbs, sleeps up to 7, 2 slides, many colors ...more

  7. Seismic 4212 Floorplan Image Zoom

    Seismic 4212

    Bath and a Half, Loft, 45 ft 1 in in length, weighs 15725 lbs lbs, sleeps up to 8, 2 slides, many colors ...more

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