California RV Lemon Law: Chassis vs. Coach Warranty Claims

Under California RV chassis vs. coach lemon law rules, a motorhome's chassis and propulsion components are treated differently from its living quarters. The chassis maker and coach builder may owe separate warranty duties. If they blame each other for an unresolved defect, you may have claims involving both manufacturers; the repair history and warranties help establish responsibility. You do not have to resolve their disagreement before requesting legal advice.

California's Song-Beverly Consumer Warranty Act protects qualifying defects in both portions, but the legal standards and remedies differ. For broader coverage, see our California motorhome and RV lemon law guide.

Is your chassis maker or coach builder denying responsibility? Request a free RV case review or call (888) 536-6628. We can review the separate warranties, repair orders, and defect history—even after one serious safety incident.

How California law divides an RV chassis and coach

Civil Code § 1793.22(e)(2) includes a motorhome's chassis, chassis cab, and propulsion components in its definition of a “new motor vehicle,” but excludes the portion designed primarily for human habitation. That does not leave the living quarters unprotected.

In National R.V., Inc. v. Foreman (1995) 34 Cal.App.4th 1072, the Court of Appeal held that the coach is “consumer goods” covered by the general replace-or-refund provisions of Civil Code § 1793.2(d)(1). The jury awarded $96,000 in damages and a $115,200 civil penalty against the coach builder. General Motors, which warranted the chassis, was separately involved in the litigation. The case illustrates why both warranties matter.

• Chassis and drivetrain: Engine, transmission, brakes, steering, suspension, fuel system, and chassis electrical equipment. The chassis manufacturer generally answers for defects covered by its warranty. For a qualifying new motor vehicle, § 1793.2(d)(2) governs replacement or restitution, including the buyer's right to choose restitution.
• Coach and living quarters: Roof, walls, slide-outs, plumbing, house electrical system, and installed living-area equipment. The coach builder generally answers for defects covered by its warranty. Section 1793.2(d)(1) governs the general replace-or-refund obligation; the buyer cannot be forced to accept replacement.

Some equipment also has a separate component warranty. A warranty's coverage—not just where a part is physically mounted—can determine which manufacturer is responsible.

Where manufacturers blame each other

Disputes often arise where chassis and coach systems interact:

• Electrical faults: Coach wiring, inverter, or converter problems that drain chassis batteries or contribute to vehicle electrical faults.
• Water intrusion: Leaks where the coach body meets the chassis cab or windshield.
• Overheating: A chassis cooling problem potentially affected by the coach builder's engine-bay design.
• Leveling and slide-outs: Equipment mounted to the frame but installed or warranted by the coach builder.
• Component warranties: Separately warranted engines, generators, refrigerators, or other equipment.

A manufacturer may say the other company's installation or component caused the defect. That allegation does not establish who is legally responsible.

How we evaluate a chassis-versus-coach dispute

Repair orders, warranties, and warranty claim records usually provide the most useful evidence. We examine:

1. Who paid for each repair. A warranty claim billed to the chassis maker, coach builder, or component supplier may show which company initially accepted responsibility, although payment alone does not conclusively establish liability.
2. “Could not duplicate” visits. These orders still document reported symptoms. Whether they count as repair opportunities depends on the record and circumstances.
3. Recurring symptoms and root causes. Different replacement parts may reflect attempts to repair the same underlying defect.
4. Time out of service. Track chassis and coach visits separately, keeping both drop-off and pickup dates. The 30-day rebuttable presumption under § 1793.22(b) concerns qualifying new-motor-vehicle claims; the repair-timing duty under § 1793.2(b) is distinct.
5. Notice to each manufacturer. Direct manufacturer notice and any required pre-suit notice must be evaluated separately for each claim.

Where responsibility is disputed, claims may be pursued against both manufacturers based on their respective warranties. You need not prove which one is responsible before seeking a case review.

Have repair orders from different RV service centers? Request a case review so the warranty responsibilities, dates, and recurring complaints can be assessed together.

Different repair standards and remedies

Chassis presumption: Within the first 18 months after delivery or 18,000 miles, whichever occurs first, § 1793.22(b) provides a rebuttable presumption after four or more attempts to repair the same defect, two or more attempts for a defect likely to cause death or serious bodily injury, or more than 30 cumulative days out of service for warranty repairs, subject to statutory conditions. The repair-count provisions require direct manufacturer notice. These are presumptions, not minimum requirements for asking an attorney to evaluate a claim. One serious event may warrant review but does not automatically establish a lemon law violation.

Coach repairs: The coach is protected as consumer goods under Foreman, but the chassis-specific 18-month/18,000-mile presumption does not apply. Whether the coach builder had a reasonable opportunity to repair a covered defect depends on the evidence.

Remedies: A qualifying chassis claim can result in replacement or restitution, including eligible taxes, fees, and incidental expenses, subject to a statutory mileage/use deduction. The coach's refund calculation may account for use before the defect was discovered. A willful statutory violation may support a civil penalty of up to twice actual damages. A prevailing consumer may recover reasonable attorney's fees and costs under § 1794(d); fees and litigation expenses depend on the claim and representation agreement.

Do the 2025 California lemon law procedures apply to RV coach claims?

The reforms enacted by AB 1755 and SB 26 created Code of Civil Procedure §§ 871.20–871.30 for covered restitution, replacement, and civil-penalty actions against manufacturers that elected into the procedures. Section 871.22(d) expressly includes a “motor home” in the chapter's definition of “motor vehicle,” while § 871.20 refers to claims under Civil Code § 1793.2(d). Because Foreman places coach claims under § 1793.2(d)(1), the statutory language supports applying the chapter to qualifying coach claims, although application to a coach-only claim has not been definitively resolved by a published appellate decision.

The California Department of Consumer Affairs manufacturer opt-in list includes Thor Motor Coach, Winnebago Industries, Forest River, Tiffin, Newmar, Jayco/Entegra, REV Recreation Group, Foretravel, and Airstream. It also includes major chassis manufacturers such as Ford, Freightliner Custom Chassis, Mercedes-Benz USA, FCA US, and General Motors. Being on the list does not by itself establish which rules govern a particular RV: the manufacturer's election and the vehicle's sale year must be checked under §§ 871.29–871.30.

For a claim covered by the opt-in procedures, two provisions are especially important:

• Filing period: CCP § 871.21 generally requires filing within one year after the applicable express warranty expires and no later than six years after original delivery, subject to statutory tolling. Different chassis and coach warranties may create different deadlines.
• Notice for civil penalties: CCP § 871.24 requires a specific written notice and repurchase-or-replacement demand at least 30 days before filing an action seeking civil penalties. The statute permits certain restitution or replacement actions without that notice, but limits penalty relief and imposes vehicle-possession requirements. Notice must go through the statutory channels, not simply to the dealer.

Do not wait until a deadline, another breakdown, or a manufacturer response to seek legal advice. Early review can help determine which notice, possession, warranty, and filing requirements apply. Contacting our firm does not replace any legally required notice or repair step.

Can an Indiana forum clause prevent a California RV claim?

Some Thor Motor Coach and Forest River warranties have directed disputes to Indiana courts under Indiana law. California appellate decisions have refused to enforce comparable clauses where they would impair nonwaivable Song-Beverly rights under Civil Code § 1790.1:

• Lathrop v. Thor Motor Coach, Inc. (2024) 105 Cal.App.5th 808; Supreme Court review granted, S287893.
• Hardy v. Forest River, Inc. (2025) 108 Cal.App.5th 450; review granted, S289309.
• Diaz v. Thor Motor Coach, Inc. (2026) 118 Cal.App.5th 589; review granted, S295851, and held pending Lathrop.

The Supreme Court's review means the controlling analysis may change. Do not assume a forum clause automatically eliminates a potential California claim; have the warranty reviewed.

What if the RV was purchased outside California?

Purchase location can affect Song-Beverly coverage. In Cummins, Inc. v. Superior Court (2005) 36 Cal.4th 478, California residents who bought a motorhome in Idaho could not invoke Song-Beverly merely because repairs occurred in California. Federal Magnuson-Moss remedies or another state's warranty law may still warrant evaluation. Do not assume that California residence or California repairs alone resolve the issue.

What California RV owners should do next

1. Address safety first: If a defect makes the RV unsafe to drive, stop using it and arrange appropriate service or towing.
2. Save all repair records: Include “no problem found” visits, warranty documents, dates, mileage, and both drop-off and pickup dates.
3. Document each manufacturer's response: Ask which warranty covers the repair and preserve written denials or referrals.
4. Identify required notices promptly: Keep records of communications with both manufacturers; have counsel check whether a formal pre-suit demand is needed and where it must go.
5. Preserve your rights: Continue required loan payments, and seek legal advice before signing a release, selling the RV, or accepting a settlement that may affect remedies.

Frequently asked questions

Can I bring claims against both the chassis maker and the coach builder?

Potentially. Each may be responsible for defects covered by its own warranty. A shared-system dispute can justify evaluating both manufacturers, without assuming both are liable.

Who pays when a defect involves both chassis and coach?

That depends on the defect, warranty coverage, and evidence. Repair orders and warranty billing help identify responsibility but do not decide it conclusively.

Does California lemon law cover the RV's living quarters?

Yes, qualifying motorhome coach defects are protected as consumer goods under National R.V. v. Foreman. The chassis-specific presumption does not apply, but a coach warranty claim may still support a refund or replacement.

Must I complete more repairs or send notice before requesting a case review?

No. Even one serious incident may justify an evaluation, although it does not automatically establish a claim. Continue appropriate safety and warranty steps; statutory manufacturer notice may be required before pursuing certain remedies.

Will the manufacturer pay attorney's fees?

California Civil Code § 1794(d) allows a prevailing consumer to recover reasonable attorney's fees and costs in a qualifying claim. The firm's fee arrangement should be confirmed during the review; recovery is not guaranteed.

Request a California RV lemon law case review

If the chassis maker, coach builder, or both have failed to resolve a covered problem, request a free case review or call (888) 536-6628. We can examine your warranty coverage, repair history, and the applicable California procedures without requiring you to settle the manufacturers' dispute first.

This article provides general information, not legal advice. Contacting the firm does not itself establish an attorney-client relationship.