California RV Lemon Law and Dealer Fraud

chassis issues in motorhomes

The Most Common Chassis Problems in Motorhomes — And Your Lemon Law Options

Ram ProMaster and Mercedes-Benz Sprinter

Chassis issues in motorhomes can weaken the reliability and stress-free travel that buyers expect. Unfortunately, motorhomes built on Ram ProMaster and Mercedes-Benz Sprinter chassis often face recurring issues, frequently leaving owners frustrated and sometimes stranded. Since the chassis is the foundation of the entire motorhome, supporting the suspension, drivetrain, and safety systems, defects here are serious and often cause lengthy repair delays.

If your motorhome is experiencing repeated chassis issues, you may have rights under California’s lemon law.

Why ProMaster and Sprinter Chassis Matter

The Ram ProMaster and Mercedes-Benz Sprinter are the most common chassis platforms used for Class B camper vans and many Class C motorhomes. Popular RV manufacturers such as Winnebago, Thor Motor Coach, Jayco, Coachmen, Tiffin, and Entegra Coach rely on these chassis to build their vehicles.

While both platforms offer versatility and drivability, they are also notorious for chronic defects that can affect safety, performance, and reliability.

Common ProMaster Chassis Issues

Motorhomes built on the ProMaster chassis are widely used in compact Class B vans such as:

  • Winnebago Travato
  • Winnebago Solis
  • Thor Sequence
  • Thor Tellaro
  • Coachmen Nova
  • Jayco Swift

Owners of these rigs frequently report:

  • Transmission Failures – Harsh shifting, slipping gears, and premature transmission replacements.
  • Steering and Alignment Problems – Wandering steering and difficulty keeping the vehicle straight.
  • Electrical Issues – Faulty sensors, alternator failures, and repeated check engine lights.
  • Brake System Defects – Premature brake wear and grinding noises.
  • Suspension Weaknesses – Rough rides, sagging under load, and uneven tire wear.

Common Sprinter Chassis Issues

Sprinter-based motorhomes are popular for their luxury features and are used in both Class B vans and Class C models, including:

  • Winnebago Revel
  • Winnebago Era
  • Winnebago Boldt
  • Tiffin Wayfarer
  • Thor Tiburon
  • Jayco Melbourne
  • Entegra Coach Qwest

Owners of Sprinter-based motorhomes commonly experience:

  • DEF (Diesel Exhaust Fluid) System Failures – Problems with emissions components can cause warning lights, limp mode, or total shutdown.
  • Transmission and Drivetrain Problems – Shuddering, rough shifting, and differential failures.
  • Electrical System Malfunctions – Wiring harness defects, faulty sensors, and dashboard warning lights.
  • Steering and Handling Issues – Wandering or pulling at highway speeds.
  • Brake System Defects – ABS sensor failures and premature brake wear.

Delays in Getting Chassis Repairs

Both ProMaster and Sprinter owners often face serious delays when seeking repairs. Dealerships frequently backorder chassis parts such as transmission components, emissions systems, or steering parts. In many cases, motorhomes remain out of service for weeks or even months, leaving owners without their RVs and with no comparable loaner vehicle.

These extended repair delays can be just as frustrating as the defect itself and they can strengthen a lemon law claim.

chassis issues in motorhomes

Chassis problems with the Ram ProMaster or Mercedes-Benz Sprinter are substantial because they affect the motorhome’s safety, drivability, and reliability. If your motorhome has repeated chassis failures or has been sidelined for long stretches awaiting parts, you may qualify for:

  • A buyback of your defective motorhome
  • A replacement motorhome
  • Or cash compensation

What Motorhome Owners Should Do

If your Ram ProMaster or Mercedes-Benz Sprinter motorhome has ongoing chassis problems:

  • Document every service visit with repair orders and invoices.
  • Keep photos and videos of dashboard warning lights, leaks, or handling problems.
  • Track repair delays; note every day your RV spends at the dealership.
  • Consult with an experienced lemon law attorney to protect your rights.
is your vehicle a lemon? Specializing in California RV lemon law and dealer fraud


Take Action Now — Don’t Let a Lemon Drain Your Wallet

California’s lemon law protects consumers when manufacturers fail to fix substantial defects within a reasonable number of attempts, or when a vehicle spends excessive time in the shop. If your Motorhome is sitting unused due to defects or scheduling delays, you may already qualify for legal relief. Contact Attorney Jeffrey Le Pere at RV Auto Legal Team today!

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, we represent motorhome owners across California dealing with defective chassis systems. If your Ram ProMaster or Mercedes-Benz Sprinter motorhome continues to experience transmission, electrical, steering, or emissions issues — or if it’s stuck in the shop for weeks — you may have a strong lemon law claim.

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



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