Keystone RV Sidewall Cracks: What You Need to Know

When you buy a fifth-wheel RV, you expect years of adventure and reliability. But for many owners of certain Keystone RV models, unexpected sidewall cracks around the front slideouts have become a serious issue. Keystone addressed this problem in Service Bulletin KSB-210122, which outlines how affected units should be inspected and repaired.

If you own a Keystone Montana, Alpine, Avalanche, Fuzion, or Raptor, it’s important to understand whether your RV is affected, what the repair process involves, and how this could impact your rights under the California Lemon Law.

What Is Keystone Service Bulletin KSB-210122?

Service Bulletin KSB-210122 was issued by Keystone RV beginning in 2022 and later revised in 2024. It provides detailed instructions for repairing sidewall cracks near slideouts on certain Keystone fifth-wheel models.

The bulletin applies to 2020–2021 Montana, HC Montana, Alpine, Avalanche, Fuzion, and Raptor units. Not every RV in those model years is affected — repairs are only required if visible cracks appear in the sidewall.

The Problem: Sidewall Cracks in Keystone Fifth-Wheels

Sidewall cracks typically form around the front slideouts due to structural stress where the chassis meets the RV’s living-area walls. These cracks don’t just affect appearance—they can compromise structural integrity, reduce resale value, and lead to water intrusion or further damage if left untreated.

KSB-210122 Repair Process

The repair procedure outlined by Keystone is extensive and must be performed by a licensed RV technician.

Inspection

Technicians must inspect the area around the slideouts for cracks before beginning repairs.
If cracks are present, photos must be submitted for warranty authorization.

Repair Steps

Remove Filon fiberglass siding around the crack.
Reinforce structure with aluminum gussets, wood backing, and epoxy adhesives.
Install expansion trim and replace Filon panels.
Cure time required: new fiberglass must cure before supports are removed.

Updated 2024 Version (KSB-210122 V2)

Keystone issued a revised bulletin in 2024 to expand and clarify the repair procedure. Updates include:

More adhesive and sealant required.
Additional wood reinforcement behind Styrofoam insulation.
Expanded trim color options (ivory or black).
Stronger guidelines for prepping and installing structural skirt metal.

Why This Matters for RV Owners

Warranty Coverage – Repairs must follow Keystone’s bulletin process to qualify for warranty reimbursement.
Repair Delays – Many California dealerships, including Camping World, Mike Thompson RV, Giant RV, La Mesa RV, Sky River RV, Blue Compass RV, and Rec Van, are heavily backlogged, leaving owners waiting months for service.
Consumer Rights – If your Keystone RV spends more time in the shop than on the road, or if repeated repairs fail, you may have a lemon law claim.

Protecting Your Rights Under the California Lemon Law

California’s Lemon Law protects RV owners when manufacturers cannot fix defects within a reasonable number of repair attempts. For Keystone RV owners dealing with sidewall cracks under KSB-210122, this could mean:

Buyback – The manufacturer may be required to refund your purchase.
Replacement RV – You may qualify for a comparable replacement.
Cash Settlement – In some cases, compensation for loss of use and diminished value.

What To Do If You Have a Cracked Keystone RV Slideout

Inspect Your RV – Look closely around the front slideouts for cracks.
Document the Problem – Take photos and keep all repair orders.
Request Warranty Repairs – Insist that Keystone’s official procedure is followed.
Call a Lemon Law Attorney – If repairs drag on or fail, it’s time to protect your legal rights.

California recently passed AB 1755, a law that shortens the deadline for filing a Lemon Law claim. Consumers must now file WITHIN ONE YEAR OF THE WARRANTY’S EXPIRATION DATE, making timing critical. Delaying could cost you your rights.

TAKE ACTION NOW: Get a FREE Consultation Today

At RV Auto Legal Team, attorney Jeffrey Le Pere has experience holding RV manufacturers accountable when defects like sidewall cracks cause frustration for owners. If your Keystone RV qualifies as a lemon, you may be entitled to a buyback, replacement, or compensation.

Serving All of California: Call 1-858-544-2292