RoadVitals

2015 Tiffin Allegro Bus Problems

Owner-reported complaints filed with NHTSA, grouped by component

Data refreshed

Owner complaintsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
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Latest Apr 12, 2025
Components namedHow many of our component categories appear on at least one report for this model year. One report can name several.
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Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
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What this page shows

Everything below is an owner-reported complaint submitted to NHTSA about the 2015 Tiffin Allegro Bus, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Reports by component

Ranked by how many owner reports name each component category

  • Engine1100.0%

Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.

Each component in detail

What the reports in each category say, in the owners' own words

Engine

Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.

1
report

From owner reports, verbatim

THIS IS NOT A SINGLE ISOLATED INCIDENT. THERE HAVE BEEN A LARGE NUMBER OF OWNERS WITH THIS ISSUE AND THE MANUFACTURER HAS NOT PROVIDED AN ACCEPTABLE SOLUTION. *DT ON THE 2015-2018 TIFFIN ALLEGRO BUS ON THE POWER GLIDE CHASSIS, A CRITICAL DESIGN DEFECT EXISTS WITH THE ENGINE FAN DRIVE TENSIONER BRACKET AND TENSIONER PULLEY ASSEMBLY. THE FAN DRIVE IS DESIGNED TO ENGAGE AT A PRE-DETERMINED ENGINE COOLANT TEMPERATURE AND IS UTILIZED TO LOWER ENGINE TEMPERATURE AS THE ENGINE COOLANT TEMPERATURE REACHES A HIGH LEVEL. THE TENSIONER BRACKET IS CONSTRUCTED FROM HEAVY GAUGE STEEL PLATE THAT IS WELDED TOGETHER AND THE TENSIONER PULLEY ASSEMBLY IS A CAST/MACHINED ALUMINUM ASSEMBLY. THE ASSEMBLY WEIGHS OVER 20 POUNDS. AS DESIGNED, THE FAN DRIVE TENSIONER ASSEMBLY CANNOT SUFFICIENTLY HANDLE THE TORQUE AND VIBRATION GENERATED WHEN THE FAN DRIVE ENGAGES. THE TENSIONER BRACKET AND PULLEY DEVELOPS MICRO-CRACKS THAT QUICKLY DETERIORATE INTO MAJOR CRACKS IN THE STEEL BRACKET AND TENSIONER PULLEY CAUSING A SUDDEN TOTAL FAILURE OF THE BRACKET, WHICH IN A WORSE CASE SITUATION, RESULTS IN THE BRACKET BREAKING INTO SEVERAL PIECES AND BECOMING DISCHARGED FROM THE REAR OF THE MOTORHOME AT HIGHWAY SPEEDS. WHEN THE BRACKET FAILS, THE ENGINE FAN DRIVE IS INOPERABLE, AND THE MOTORHOME OPERATOR EXPERIENCES A RAPID INCREASE IN ENGINE TEMPERATURE AND THE ENGINE SHUTS DOWN, POSSIBLY CAUSING A LOSS OF VEHICLE CONTROL.. SHOULD THE FAN DRIVE TENSIONER AND TENSIONER BRACKET BECOME DISLODGED FROM THE MOTORHOME ENGINE COMPARTMENT, IT COULD STRIKE ANOTHER VEHICLE OR PERSON CAUSING SEVERE DAMAGE, INJURY, OR POSSIBLE DEATH. TO DATE THE MANUFACTURER HAS BEEN UNABLE TO DESIGN/PROVIDE A FAN DRIVE TENSIONER ASSEMBLY THAT WILL WITHSTAND THE TORQUE AND VIBRATION BEING GENERATED. THE MANUFACTURER SHOULD IMPLEMENT A RECALL OF THE FAN DRIVE TENSIONER BRACKET AND TENSIONER PULLEY ASSEMBLY,

NHTSA ID 11128294 · filed Sep 8, 2018

Too few reports in this category for a page of its own — they appear in the full complaint list.

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.

Elsewhere on this vehicle

Data sources

Data on this page last refreshed .