Skip to main content

New 2021 Jayco Seismic 4212

Virtual Tour Video Tour Sale Pending
2021 4212 Features and Options

Call for details

(928) 445-7910


Standard Exterior Equipment

102 in. wide-body structural steel I-Beam construction

Stronghold VBL™ aluminum framed and vacuum bond laminated gelcoated fiberglass exterior walls (including slide room end walls)

Magnum Truss™(strongest tested roof in the industry) with one piece, seamless DiFlex II material

Climate Shield™ zero-degree tested weather protection: fully enclosed and heated underbelly (ducted), 40,000 BTU output furnace, double layer fiberglass batt insulation (roof, floor, and behind cap), PEX plumbing

HELIX Cooling System™ (industry exclusive): dual exterior-mounted 15,000 BTU "Whisper Quiet" A/C units, Jayco exclusive insulated dual duct design, directional and closeable A/C vents, larger return air vents with use accessible filters

JaySMART™ (Safety Markers And Reverse Travel) LED lighting (patent-pending)

Painted fiberglass front cap with built-in specialty LED lighting

Custom automotive-grade vinyl exterior graphics package

Dual 30 lb. propane bottle with auto regulator

Pass-through storage with Slam-latch™ baggage doors

Digital TV antenna with Wi-Fi extender

Exterior marine-grade speakers

Fully enclosed, LED-lit universal docking center: selectable water connections, quick-connect outside shower, black tank flush, winterization and sanitation, independent satellite and whole coach cable hookups

Water heater bypass

Battery disconnect

Under-mounted spare tire (Goodyear® Endurance® tires- made in the USA)

Folding roof ladder

LP quick connect (outside grill prep)

Oversized multi-battery compartment (industry leading room for 4-6 batteries) Standard Interior Equipment

Solid hardwood slide fascia and doors

5/8 in. tongue-and-groove joined plywood floor decking

Vinyl flooring (made in the USA) throughout (includes slideout floors)

Bluetooth® LED dimmer switches in main room

JAYCOMMAND™ "Smart RV" system

SuperSofa with heat, massage, recliners, cup holders, and LED lighting

Dual USB charging ports

12V charging station

Carbon monoxide and LP detector

LED fireplace with 5,000 BTU electric space heater

Hidden hinges on cabinet doors

Positive catch, heavy-duty, 75 lb. full-extension, steel ball-bearing drawer guides

Stainless steel kitchen sink

Brushed nickel kitchen faucet with pull-out sprayer

Hardwood safety handrail on hallway steps

C.P.A.P. prepped bedroom

Bathroom skylight

Porcelain foot flush toilet

Bathroom hallway window Ramp and Cargo Equipment

Gravity assist ramp door, 3,000 lb. capacity, 93-3/8 in. wide opening with anti-slip, non-skid flooring

LED high-intensity ramp lights

Tuff-ply, rubberized garage floor liner

2 in. block-foam fully insulated garage floor (industry first)

24 in. x 72 in. garage entry door with step light

Vent ports and tinted power roof vent (N/A with optional 3rd 15K A/C)

HappiJac® electric-lift queen beds/convertible sofas with folding armrests and cup holders

Pull-down ramp door screen

Dual 30 gal. fuel tanks with timer (1 dedicated to generator)

Metal ram air vents for ventilation

Customer Value Package

 Equalizer Systems Hydraulic 6-point auto-leveling system with oversized foot pads

• JAYCOMMAND™ "Smart RV" system powered by BMPRO®

• Drinking Water System™ (patent-pending)

• MORryde® StepAbove™ entrance steps (main entrance)

• 15,000 BTU "Whisper Quiet" A/C in living room

• 2nd 15,000 BTU "Whisper Quiet" A/C ducted in bedroom

• Dual electric patio awning with integrated LED lights

• 10 gal. gas/electric DSI water heater

• Residential queen (60 in. x 80 in.) Serta® mattress with under-bed storage

• Central vacuum system

• Custom machined aluminum rims

• LED HDTV with fully digital HDMI® output

• JBL® home entertainment system

• Residential 24 in. Insignia™ stove (3.73 cu. ft.) with 12K BTU high output burner

• Residential solid-surface kitchen countertop with bamboo sink cover and strainer

• Convection microwave

• Day/night roller shades in living room

• 32 in. bedroom TV

• Residential walk-in shower with shampoo/soap holder

• Washer/dryer prep

• Keyed Alike™ lock system (single key for all doors/locks)

• Rooftop and ground solar prep by Go Power!®

• Backup and side observation camera prep

• Cellular prep for antenna and JAYCOMMAND™ "Smart RV" system

• Tire Pressure Monitoring System (TPMS)

• Frameless dark tinted safety-glass windows

• 5,500W Onan® gas generator (CARB-certified)

5 Star Handling Package

• Goodyear® Endurance® tires (made in the USA)

• Dexter® axles with Nev-R-Adjust® brakes, E-Z Lube® hubs, & 4000 lb. leaf springs

• MORryde® pin box

• MORryde® CRE-3000™ rubberized suspension

• Wet bolt fasteners and bronze bushings

Additional Upgrades:

• Extreme Weather Package

• Solar Package

• 15,000 A/C Drop in Cargo

• 32” TV in Cargo

• Backup Camera w/Side Camera

• 2nd Solar Panel

• Party Deck w/Folding Rails & Electric Awning

• 3 Season Removable Garage Wall

• King Bed

What Our Customers Are Saying

Jenn Curry

The team took very good care of us! would recommend!! - Jenn from Prescott, AZ
MSRP: $132,868
Save: $34,006
SALE PRICE: $98,862
Location: Prescott, AZ
Stock# 10G0076
2021 4212 Specifications
Sleeps 10
Slides 2
Length 44 ft 11 in
Ext Width 8 ft 6 in
Ext Height 13 ft 3 in
Interior Color Modern Farmhouse
Gross Weight 20695 lbs
Dry Weight 16515 lbs
Cargo Weight 4180 lbs
Fresh Water Capacity 102 gals
Grey Water Capacity 87 gals
Black Water Capacity 87 gals
Tire Size 16
Furnace BTU 40000 btu
Refrigerator Size 18 cu ft
Number of Awnings 2
Axle Weight 7000 lbs
LP Tank Capacity 60
Water Heater Capacity 10 gal
AC BTU 30000 btu
Awning Info 10' & 20'
Axle Count 3
Number of LP Tanks 2
For more information, call us at 928-445-7910 or Contact Us
Similar RVs and Floorplans


Jayco Logo

Jayco, Inc. was founded in 1968 by a man of strong faith and vision. The late Lloyd J. Bontrager, family man and inventor, felt he could build the world a better RV. He longed to create a company of his own, one that clearly reflected his ideals: a company where everyone would be treated as "family".

With encouragement from his wife Bertha, Lloyd started Jayco on their farm--in two chicken houses and a barn! He developed his own prototype camping trailer and a unique lifter system for fold-down campers, the basic design of which is patented and still in use today. By the end of 1968, his fledging company of 15 employees had sold 132 fold-down camping trailers.

Today, Jayco's "family" of employees has grown to nearly 1,500 people, while more than 25,000 people join our "extended family" of customers each year.

At Jayco, our mission statement is: Committed to being the most respected name in recreation vehicles. We will consistently build a high quality, high value, competitively priced product at acceptable margins, treat every situation with the highest level of integrity in a timely manner, and continually work to reduce total cost to achieve acceptable returns.

Affinity RV is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes sales tax, registration tags, and delivery fees. Manufacturer pictures, specifications, and features may be used in place of actual units on our lot. Please contact us @928-445-7910 for availability as our inventory changes rapidly. All calculated payments are an estimate only and do not constitute a commitment that financing or a specific interest rate or term is available.