RV Diesel Exhaust Fuel (DEF Head) Sensor failure. These failure rendered our RV drivability limited and us stranded at Cummins dealerships, once in 2019 and again in 2020. We have been full time RV'ers and rely on motorhome getting us from place to place. We were lucky to not have the engine derate while driving, but had to pull over on the freeway, there were no off ramps or rest stops for miles as multiple warning lights and codes flashed on the dash so we could call Tiffin to ask for help, what to do and where to go. We where able to get to a Cummins dealer to have it fixed. We were warned to drive slow and straight to the Cummins dealership before the engine derated. RV Diesel Exhaust Fuel Sensor failures have been occurring & re-occurring at an astronomical rate across the country, we firmly believe that RV's should be exempt from requiring DEF / DEF Sensors, period. Please do not wait until there is a FATALITY, OR POSSIBLE GREATER FATALITIES before making this change retroactive for all RV's nationally. The Cummins dealerships and Tiffin have the repair records. The error codes we received was SPM 3521 FMI 11 error code. Looking it up it is "After treatment 1 Diesel Exhaust Fluid Property". Also SPN 3364-9, ECM 1761-9, ECM 3031-9, SPN 3364-9 and ECM 3031-9 showed up.
The worst 2018 Tiffin Allegro problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Brakes2
- Body1
- Engine1
- Transmission1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Brakes2
- Body1
- Engine1
- Transmission1
Recalls 3
Electrical system
- What is wrong
- Tiffin Motorhomes, Inc. (Tiffin) is recalling certain 2018-2022 Allegro and Allegro Breeze motorhomes. The buss bar may be improperly secured, which can cause electrical components in the DC Distribution Panel to overheat.
- Risk
- Overheated electrical components can melt and increase the risk of a fire.
- Remedy
- Dealers will replace the buss bar with a cable, free of charge. Owner notification letters were mailed March 18, 2022. Owners may contact Tiffin customer service at 1‑256‑356‑0261. Tiffin's number for this recall is TIF-120.
Recall number 22V068000 · Recall details
Seat belts: rear/other: anchorage
- What is wrong
- Tiffin Motorhomes, Inc. (Tiffin) is recalling certain 2018-2022 Allegro Breeze, Allegro Red, Allegro, Allegro Bus, Phaeton, and 2018-2021 Zephyr recreational vehicles. The sofa seat belts may not have been installed correctly, which could result in unsecured passengers. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 210, "Seat Belt Assembly Anchorages."
- Risk
- Unsecured passengers have an increased risk of injury in the event of a crash.
- Remedy
- Dealers will inspect and repair the seat belts as necessary, free of charge. Owner notification letters were mailed October 29, 2021. Owners may contact Tiffin customer service at 1‑256‑356‑8661. Tiffin's number for this recall is TIF-118.
Recall number 21V680000 · Recall details
Equipment
- What is wrong
- Tiffin Motorhomes, Inc. (Tiffin) is recalling certain 2009-2018 Allegro and Allegro RED, Bus and Phaeton vehicles, 2009-2010 Bay vehicles, 2011-2018 Breeze vehicles, and 2009-2015, and 2017-2018 Zephyr vehicles. These motorhomes are equipped with Kidde Plastic-Handle or Push Button 'Pindicator' Fire Extinguishers that may become clogged, preventing the extinguisher from discharging as expected or excessive force may be needed to activate the extinguisher. Additionally, in certain models, the nozzle may detach from the valve assembly with enough force that it could cause injury and also render the product inoperable. For a full list of the affected fire extinguisher models visit:
- Risk
- In the event of a fire, if the fire extinguisher does not function properly, it can increase the risk of injury.
- Remedy
- Tiffin will notify owners, and instruct them to contact Kidde for a replacement fire extinguisher, free of charge. The recall began on February 5, 2018. Owners may contact Kidde customer service toll-free at 1‑855‑262‑3540, or online at www.kidde.com and click on "Product Safety Recall" for more information. Owners may also contact Tiffin customer service at 1‑256‑356‑8661.
Recall number 17V841000 · Recall details
Technical service bulletins for the 2018 Tiffin Allegro 3
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
What 2018 Tiffin Allegro owners say
Most recent owner complaints, unedited.
Wheel speed sensors went out,and went into limp mood,transmission would not, shift,lights came on dash,ABS,check engine light,and moore. This was on a interstate,good way to get run over. We are in a rev club there is a lot of this going on.
Entry door latch on our tiffin 2018 allegro bus unlatched as we were in motion on a highway
Tl* the contact owns a 2018 tiffin allegro hitched to a freightliner chassis. The contact stated that while driving down an incline, the exhaust brake system activated causing the brake lights to the freightliner chassis to activate. As a result, the brake lights remained activate on the rv as well and the contact was concerned that that they would overheat during the sixteen mile downhill drive. The contact mentioned that only the towed vehicles brake lights should illuminate and that the brakes should only activate when the brake pedal was depressed. The vehicle was taken to freightliner dealer: m & m coach at 5787 mccully st, chino, ca 91710 where they attempted to turn off the brakes lights but failed. The freightliner manufacturer was notified of the failure where they informed the contact that the multiplex system was programmed where the brake lights remain illuminated when the exhaust brake system was activated. The approximate failure mileage was 6,400. No further information was available for the freightliner chassis.
Compare the 2018 Tiffin Allegro
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Questions about the 2018 Tiffin Allegro
Is the 2018 Tiffin Allegro reliable?
Owners have filed 4 complaints about the 2018 Tiffin Allegro, 1.3 times a typical Allegro model year.
What is the most common problem with the 2018 Tiffin Allegro?
Brakes, with 2 complaints. Next is body (1).
How many recalls does the 2018 Tiffin Allegro have?
3 recalls, covering electrical system, seat belts and equipment.
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