Tiffin motorhomes, inc. (Tiffin) is recalling certain model year 2011 allegro and phaeton recreational vehicles built on freightliner chassis and equipped with a cummins isc, isx, ism, or isl diesel engine. The v-band clamp assembly, part numbers q187684...
Engine & cooling
Tiffin Allegro Engine problems by year
14 complaints filed with NHTSA about the Tiffin Allegro's engine & cooling. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.
Engine complaints by model year
Engine recalls
Latest Allegro engine complaints
The DEF headers (level sensors) are a known issue with these motor homes and many other diesel vehicles dating back to 2010 to even new ones today. Shaw Industries is one of the main suppliers of this part (the supplier of the ones on Tiffin Motorhomes) and have done nothing to reimburse owners for the failures. When the level sensor fails the vehicle can go into a derate mode causing it to only be able to go 5 mph. This can be very dangerous for someone on a road trip hundreds of miles from any service, plus...
Read the full complaint
obtainung a replacement can take months, leaving people their families and dogs stranded that entire time. These DEF headers need to be recalled and all costs reimbursed to the techs of thousands who have had issues with them. Emissions control systems are expected to last for the life of a vehicle, not fail frequently, with replacement costs going into the thousands of dollars.
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...
Read the full complaint
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.
RV Diesel Exhaust Fuel (DEF Head) Sensor failure. This failure rendered our RV broken down and undriveable ("derate" mode of 5 mph) roughly 1,500 miles from home, on the freeway, in approx. 105 degree weather. We had our family with us & our dog. Note; we did NOT have a tow vehicle to transport us to a safe area. This constituted a VERY UNSAFE TO FATAL CONDITION / SITUATION!!! Typically, RV's are not operated on a daily, or even weekly basis such as big rig trucks by truckers. That being stated, the DEF (diesel...
Read the full complaint
exhaust fuel) lifespan is greatly shortened (contaminated, crystallized) if not used on a regular basis. -Being that these Diesel Exhaust Fuel Sensor failures have been occurring & re-occurring at a 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.
Tl* the contact owns a 2017 tiffin allegro. While driving approximately 50 mph, the steering lost power and the steering wheel seized. Several warning indicators illuminated on the intrument panel, including the low voltage warning indicator. The contact also stated that the vehicle made loud noises while driving over 50 mph. The vehicle was taken to poulsbo rv (425-353-6122, located at 12218 wa-99, everett, wa 98204) and the contact was referred to freightliner northwest (800-523-8014, located at 277 stewart rd...
Read the full complaint
sw, pacific, wa 98047). The technician replaced the serpentine belt. The contact called the manufacturer and left a message, but was not called back. The failure recurred and the vehicle was taken back to the freightliner northwest dealer, but the technician could no longer work on the vehicle and advised the contact to tow it to cummins sales and service (425-235-3400, located at 1800 fryar ave, sumner, wa 98390). The dealer repositioned the radiator and air conditioning units, but the vehicle was not repaired completely. The failure mileage was approximately 4,287.
Shortly after engine start and during or shortly after warm-up, when accelerating from a stop, the engine loses all power. If you hold the accelerator pedal in one position, it will remain at idle. If you pump the accelerator pedal or push to the floor, it will catch up and accelerate. It will not do it again in that drive cycle. It does not do it every time. It has done it approximately 6 times. All under the exact same circumstances. There are no dtc's stored. It has only happened when pulling out into traffic....
Read the full complaint
I will not pull into traffic without traffic control device now unless it is a right turn only. This is extremely dangerous since it will not accelerate up to speed and could cause an accident if it fails to accelerate in traffic. *Tr
Tl* the contact owns a 2011 tiffin allegro rv. While driving approximately 55 mph, the contact smelled a burning odor and maneuvered to the side of the road. Suddenly, the rear end of the vehicle engulfed into flames, which the contact stated originated from the engine area. The fire department extinguished the large flames and the vehicle was declared as destroyed. The vehicle was towed to an impound facility. There was no personal injury. The manufacturer was made aware of the defect. The contact discovered a...
Read the full complaint
recall which could possibly have been related to the defect under nhtsa campaign id number: 11v416000 (engine and engine cooling: exhaust system: manifold/header/muffler/tail pipe). The consequence occurred before the recall repair was performed. The approximate failure mileage was 8,000.
Tl* the contact owns a 2003 tiffin allegro bay rv equipped with a workhorse w22 chassis. While driving 65 mph, the reduce power warning light illuminated as the rv stalled. The contact was able to restart the rv after several moments. The contact stated that the failure would recur intermittently on a regular basis. The rv was taken to a dealer twice and they were unable to duplicate the failure. The failure persisted and the rv was taken back to the dealer. The dealer then replaced the throttle body modular but to no avail. The failure mileage was unknown and the current mileage was 28,000. Updated 03/07/11*lj updated 09/16/11
Tiffin motorhome problems experience with rv drivers seat belt , both windshield wipers and electrical system. Vehicle warped and misaligned body chassis. *Bf the vehicle overhead a/c failed. The 20 amp fuse blew intermittently when the consumer tried to use the a/c. When the consumer attempted to buckle the belt it tightened and wouldn't release. The entrance door was out of alignment therefore it couldn't be locked form the outside. The dining seat top raised up about and inch because it had nothing under...
Read the full complaint
it for security. The exhaust pipe was not attached to the frame of the vehicle. The toilet valve stuck in the open position leaving the tank exposed or the smell to come back into the vehicle. The rearview mirror moved while the consumer was yielding into traffic. The windshield had stress cracks from being installed incorrectly. *Nm
Installation of incorrect headlights. *Mr the headlights were designed for angular body placement, but when used on a flat front, it shined little light on the road and shined more onto the shoulder and oncoming traffic. The electric speedometer would get stuck at 40 miles or so, the vehicle leaned to the right side at times, which caused a stabilization problem, the window coverings would not stay up during vibration of driving , the double hung window located near the entry door with a screen on the top...
Read the full complaint
piece would constantly fall down, the back up camera would become unplugged with vibration or would get knocked off when the turn signals were engaged, there was no water pressure valve system and the water would cut off, there was a water leak in the water system, the vertical vinyl strip cracked in the rear of the vehicle, and the hydraulic lines were hanging freely and rubbing the front wheel. (2001 Allegro) *sc *jb
Motorhome lost power on 4 different occasions and suffered a severe jolt while travelling 60 - 65 mph on 3 diffrerent occasions.*Ak
INTERMITTENT STALLING. *AK
Heater grid is part of engine cooling system. This system didn't turn off and wire was burning. Dealership is aware of problem.*Ak
Vehicle has cut off while driving on several occasions. Feel free to provide any further information.*Ak
Installed another rebuilt engine, now it is failing, crank shaft has end play, rebuilt engine.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data