Roadtrek Class B motorhomes built before the February 2019 bankruptcy were often brilliant—compact, nimble, and packed with thoughtful engineering. But they also came with some signature problems that every owner should know about. If you own a pre-2019 Roadtrek on a Sprinter chassis, this guide will help you understand what can go wrong and how to fix it.

The Bankruptcy Aftermath: Parts, Warranty, and Support

When Erwin Hymer Group North America declared bankruptcy in February 2019, it sent shockwaves through the Roadtrek community. Over 1,000 employees were laid off, and the brand effectively went dark. Rapido Group acquired the Roadtrek name later that year, but the deal came with significant strings attached.

The warranty problem: Original owners lost the promise of full 6-year coverage. Rapido’s takeover came with a hard reset: only 2 years or $1,500 in repairs maximum, whichever came first. For owners of 2017–2018 models, this was a devastating cutback halfway through what should have been protected time.

The parts problem: Roadtrek used proprietary components that no competitor stocks. The E-Trek lithium battery system, custom cabinet assemblies, and specialized upholstery are nearly impossible to source now. Vendors have been absorbed or liquidated, and Rapido has shown little interest in legacy parts support.

What you can do: Don’t go it alone. Your best resources are the Roadtrek owner community:

  • Roadtrek Owners and Roadtrek Owners Helping Roadtrek Owners Facebook groups have thousands of members, many of whom faced the same problems and can point you toward workarounds.
  • Roadtreking blog archives contain years of maintenance wisdom and model-specific fixes.
  • Sprinter-Source.com Roadtrek subforum and iRV2 Class B forum are goldmines for mechanical help.

Many pre-2019 owners have become expert improvisers out of necessity. Lean on them.

E-Trek / EcoTrek Lithium Battery Failures

The E-Trek lithium battery system was supposed to be Roadtrek’s crowning achievement: a lightweight, efficient 13.6 kWh Valence-based LiFePO4 pack that promised decades of service life. Instead, it became one of the most common warranty claims before the bankruptcy—and one of the biggest headaches afterward.

What goes wrong: Batteries fail within six months of delivery. The culprit is usually incorrect internal wiring on the battery management system (BMS) side; one cell bank drops offline while the other appears healthy. Since Valence itself went bankrupt in 2015, replacement cells are unobtainable. Even worse, the BMS often locks up electronically when it detects imbalance, preventing any charging at all.

Other failure modes include load-dump events (sudden voltage spikes) that cascade damage through the auxiliary power distribution panel, destroying inverters and battery chargers downstream. A fully discharged lithium pack can demand so much current from the alternator during recharge that it causes overheating and fire risk.

The real danger: If your E-Trek lithium battery is still working, do not discharge it below 20% state of charge. A fully discharged pack is a liability. If it fails and you need to swap it out, expect to spend $5,000–$8,000 for a modern LiFePO4 drop-in, plus labor.

What you can do:

  • Install a DC-to-DC charger (Victron, Orion, or similar, ~$800–$1,200) as an intermediary between the alternator and battery. This limits charging current and protects the lithium pack from voltage spikes.
  • Consider a full retrofit to Battle Born LiFePO4 or a quality AGM system if your E-Trek shows any signs of trouble. Many Roadtrek owners have successfully gone this route.
  • Monitor your BMS firmware version if possible; some field updates were issued before the bankruptcy.

OM642 Engine Issues: EGR, Turbo Resonator, and Oil Cooler

The 2.2L OM642 diesel powers most 2010+ Roadtreks, and it’s generally a solid engine. But three specific weak points plague pre-bankruptcy builds:

Oil Cooler Seal Leaks

The engine oil cooler seals began failing around the 2010 model year. You’ll notice a gradual drop in oil level or, worse, a fine mist under the van after long drives. Repair involves removing and resealing the cooler ($800–$1,400 depending on your mechanic’s hourly rate).

EGR Cooler Failure and Limp Mode

The EGR (exhaust gas recirculation) cooler is a known failure point on 2010+ OM642 units. It accumulates soot and mineral deposits from the EGR circuit, restricting coolant flow. When it clogs, the engine drops into limp mode (reduced power, ~30 mph max). A full replacement runs $2,200–$3,000 at a specialist.

If your Roadtrek suddenly won’t exceed 30 mph and the check-engine light is on, head to our limp-mode diagnostic tool to explore this and other possibilities.

Turbo Resonator Cracking

The plastic turbo intake resonator is prone to stress cracking and splitting, especially on 2011–2015 models. The cost of replacement is frustrating: $2,400 or more at a Sprinter specialist, because the whole intake manifold assembly must come out. Some owners have reinforced cracked resonators with epoxy or aluminum tape, but these are temporary fixes.

Timing Chain Wear

A small percentage of 2011–2015 OM642 engines developed timing chain stretch. This is rare enough that it’s not a universal recall, but if your Roadtrek is high-mileage, ask your mechanic to listen for a rattling sound at cold start.

Critical oil spec: Always use Mercedes 229.52 spec oil (or equivalent, like Mobil 1 0W-40). Non-spec oil can damage the DPF and particulate sensors.

NOx Sensor and DEF/AdBlue System Failures

The nitrogen oxide (NOx) sensor on 2010+ Sprinters monitors emissions and triggers the DEF (diesel exhaust fluid) system. When it fails, you’ll see “Starts Remaining” countdowns on the dash—eventually, the truck won’t start at all.

The sensor problem: OEM sensors cost $1,400+ at a Sprinter dealer, even when ordered secondhand. Worse, many Roadtreks built before mid-2016 came with early-revision sensors that fail prematurely due to defective manufacturing batches. Insist on 2016+ manufacture-date sensors if you need a replacement.

The DEF heater problem: The DEF tank heater element burns out, especially in cold climates. If left running dry or if the element fails, DEF freezes in the tank, and the truck goes into reduced-power mode until you can thaw it out or replace the fluid system.

What you can do:

  • If your NOx sensor is failing, get a second opinion before paying dealer rates. Some independent Sprinter shops can source used sensors for $600–$800.
  • Monitor your DEF fluid level in winter; never let it drop below a quarter-tank in freezing climates.
  • If you’re in a cold region and the DEF system fails, keep gallons of DEF in the cabin and have a plan to replace it without a working heater.

See our guide on Sprinter AdBlue/DEF warning resets for more detail.

Ultraleather Upholstery Peeling and Interior Quality

Roadtreks from 2015–2019 featured “ultraleather” captain’s chairs that were supposed to be durable and low-maintenance. They weren’t. The coating began peeling and chipping off within two years on many units, exposing the backing beneath.

Root cause: The leather compound came from a defective supplier batch. Some chairs held up fine; others were hopeless. Replacement runs $1,000+ per seat, and there’s no easy repair—the peeling accelerates once it starts.

Cabinet and seating issues: Beyond the chairs, the interior build quality was highly variable. Cabinet latches stick and break, bench seats collapse from delamination, and stress cracks in the fiberglass roof reappear even after factory repair attempts.

What you can do:

  • If your chairs are peeling, document it with photos. File a claim with your extended warranty provider (if you have one) or with Rapido directly, though don’t expect much.
  • Consider aftermarket seat covers as a protective measure. They’re not pretty, but they stop further damage.
  • For cabinet latches, hardware stores sell replacements that can be retrofitted.

Heating System Problems

Roadtreks came with one of two heating setups: an Espar/Webasto Airtronic D2 diesel furnace, or on later models, an Alde hydronic loop. Both have known issues.

Diesel Furnace (Airtronic D2)

The Airtronic D2 is a proven design in Mercedes sprinters overall, but in the confined Roadtrek cabin layout, it sometimes struggles with air supply or exhaust routing. Partial blockages of the intake or exhaust tubes reduce output. Glow-plug fouling is also common if the unit sits unused for months.

Electric Water Heater

Many Roadtreks use an electric on-demand water heater for hot water and cabin heating. If the element is left running with an empty tank, it burns out catastrophically. Cost to replace: $600–$900. The fix is simple—never run it dry—but owners often don’t learn this until it’s too late.

Alde Hydronic Heating (2018+)

The later Alde 3000 heat loop is more efficient than diesel furnaces, but early examples (2018 models especially) struggled with inadequate circulation in very cold weather, leading to freeze-ups. Glycol system leaks from tubing routed through the wheel well are also common.

What you can do:

  • Run a diesel furnace glow-plug cycle every month during off-season storage.
  • Never leave an electric water heater powered on unless the tank is full and pressurized.
  • If you have an Alde system and live in cold climates, insulate all exterior glycol lines with foam pipe wrap.

NHTSA Recalls: Seat Safety and Fire Extinguisher

The National Highway Traffic Safety Administration issued at least three recalls affecting pre-2019 Roadtreks:

2019 Campaign 19V450000: Captain’s Chair Safety (2013–2019 Models)

This is a significant one. Second-row captain’s chairs in 2013–2019 Roadtreks failed FMVSS (Federal Motor Vehicle Safety Standard) 210 and 207 crash protection requirements. Remedy: the seat belts were disconnected and warning labels added. No retrofit seat was offered. If you have passengers in the second row, understand that those seats provide minimal restraint in a crash.

2018: Kidde Fire Extinguisher Clogging

Some Kidde fire extinguishers installed in 2018 units were prone to internal clogging. The extinguisher would discharge but deliver no suppressant. Check your unit’s batch number on the NHTSA website and request a replacement if affected.

2006–2008: Spare Tire Carrier Obstruction

Rear-mounted spare tires on older models impeded rear tail light visibility. Less critical than the other two, but worth knowing if you own a first-gen Roadtrek.

What you can do: Check the NHTSA recalls database (safercar.gov) with your VIN to see which campaigns apply to your specific unit. Contact the selling dealer or Rapido directly to confirm remedy status.

Bringing It All Together

Pre-bankruptcy Roadtreks are clever, efficient little motorhomes, but they came with some real design flaws and manufacturing hiccups. The good news is that your owner community is vast and resourceful. The bad news is that parts support and warranty coverage are gone.

If you own a pre-2019 Roadtrek on a Sprinter chassis, your best strategy is prevention and early detection. Monitor your E-Trek battery closely, don’t skip oil changes, and listen to your engine. When problems do arise, tap the Facebook groups and forums before spending money on guesses.

For deeper diagnosis of specific symptoms—limp mode, DEF warnings, loss of heat, electrical gremlins—visit SprinterRVDesk.com and use our AI diagnostic tool. You can describe your Roadtrek’s exact model, year, and symptoms, and get guidance tailored to your rig.

And remember: you’re not alone. Thousands of Roadtrek owners have walked this path before you. The community is standing by to help.