RoadVitals

2020 Tiffin 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.
1
Latest Aug 10, 2021
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 2020 Tiffin 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

DEF "Head" sensor failure resulting in power reduction to 5%. Due to faulty def head sensors the vehicle will experience power loss dropping to 5% load. These sensors do nothing but measure DEF fluid level and temperature in it's tank. DEF continues to be supplied to the exhaust meeting all EPA regulations in place at this time, BUT the Engine ECU will shut you down leaving you stranded. Problems with micro chip shortages have left many stranded with nothing in place to help them get "home".. We are talking weeks to Months in some cases only to have the def head finally replaced only to fail again with in a couple thousand miles. Emissions are not effected, but "Shaw Development" (DEF Head manufacturer ) Nor Cummins (engine manufacturer) has not done anything to prompt the EPA to allow a work around for this problem. Emergency Response vehicles do have programing in their ECU which allow them to operate normally until new parts are available. Why not for the thousands of Motor Home owners as well as over the road trucks which are effected as well. It's not a question of if this will happen, it's a question of when this will happen.

NHTSA ID 11428586 · filed Aug 10, 2021

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 .