Floor plan
Single-Slide Mid Bath
45' single-slide layout with a mid-coach bath — the lighter configuration Millennium has built on the X3-45
Click to enlarge
2020 Millennium Luxury Coaches
2020 Millennium Millennium X3-45 for Sale
We don't sell this from a lot. RVBrokers is a buyer's agent, so we help you find, price, and negotiate this model wherever it is, and line up an inspection before you pay.
A custom conversion on Prevost's X3-45 shell — the more affordable, often single-slide entry into a Millennium coach.
The X3-45 is Millennium's conversion of Prevost's X3-45 shell — the lower-floor sibling to the flagship H3-45, sharing the same 45-foot length, Volvo D13 diesel, and Allison automatic, but typically reaching the market at a more attainable price than a top-trim H3-45 build. Millennium has built X3-45 coaches in lighter, single-slide, mid-bath configurations as well as more elaborate layouts, again hand-finished with custom cabinetry and leathers. As with everything Millennium does, each X3-45 is one-off and sold call-for-price, new or pre-owned. For a buyer who wants a genuine Prevost-based Millennium conversion with a simpler floor plan and a lower entry point than the showcased H3-45 quad-slide builds, the X3-45 is the practical way in — provided you verify the specific coach's spec and condition.
Looking for a Millennium Millennium X3-45 for sale?
You're in the right place. We don't sell the Millennium X3-45 off a lot — we work for you, find the cleanest one on the market new or used, inspect it, and negotiate it. Below is everything you need to know before you shop: the real specs, every floor plan, the photos, what it tends to sell for, and a straight read on what owners love and what they grumble about.
Gallery
Millennium X3-45 — inside & out
Specs
Millennium X3-45 specifications
Length45'
SleepsVaries by custom build (typically 2)
Bathrooms1 (mid bath) on the single-slide builds; varies by conversion
ChassisPrevost X3-45
EngineVolvo D13 Diesel
TransmissionAllison 6-speed Automatic
GeneratorOnan diesel generator (size varies by build)
StorageFull pass-through basement bay storage (Prevost chassis)
Specs reflect the 2020 model year and can vary by floor plan and options.
Floor plans
2 Millennium X3-45 floor plans
Tap any diagram to see the full layout. The floor plan you choose changes the sleeping setup, bath, and storage — it's the single biggest decision on this coach.
Click to enlargeFloor plan
Custom
Like all Millennium builds, the X3-45 is one-off; slide count, bath placement, and layout are designed to the buyer's spec
Click to enlargeOwner verdict
What buyers love and what to watch
What buyers love
- A real Prevost-platform Millennium conversion at a more attainable price than the H3-45 flagships.
- Single-slide, mid-bath builds are simpler and lighter than the quad-slide showcase coaches.
- Same proven Volvo D13 and Allison drivetrain and Prevost basement storage as the H3-45.
What to watch
- Still quote-only and still a high-six-figure-plus custom coach — not a budget RV.
- Configurations vary widely; a single-slide mid-bath is far simpler than the showcased quad-slide builds, so confirm exactly what a given coach has.
- As with the whole brand, there is no broad independent review data — inspect the specific unit and its history hard.
Notable features
- Built on Prevost's X3-45 shell — same 45-foot chassis, Volvo D13, and Allison transmission as the H3-45
- Single-slide, mid-bath configuration available for a simpler, more attainable conversion
- Hand-finished custom cabinetry, leathers, and integrated systems
- A lower entry point into a genuine Prevost-based Millennium coach than the flagship H3-45 builds
More from Millennium
Compare other Millennium Luxury Coaches models
Questions
Millennium Millennium X3-45 — buyer FAQs
How much does a Millennium Millennium X3-45 cost?
Quote-only from Millennium; pre-owned X3-45 conversions generally trade below comparable H3-45 builds, often in the mid-to-high six figures depending on year, slides, and interior. Price swings hard on year, mileage, slide count, and condition, so treat that as a starting point — tell us the exact coach you're eyeing and we'll get you the real number.
Is the Millennium X3-45 gas or diesel?
Diesel. It runs a Volvo D13 Diesel on a Prevost X3-45 chassis.
How big is the Millennium X3-45?
It's 45' long and sleeps Varies by custom build (typically 2). There are 2 floor plans to choose from.
Should I get a used Millennium X3-45 inspected before I buy?
Yes — every time. Our independent inspectors check the roof, slides, levelers, and chassis before money moves, and our buyer's agents use anything they find to negotiate the price down.
Talk to a human
Ready to find your Millennium X3-45?
Tell us the floor plan and budget you want. We'll hunt the best one for sale, inspect it, and negotiate it — entirely on your side.