2019 Tiffin Allegro: common problems

Owners of the 2019 Tiffin Allegro filed 2 complaints with NHTSA, most often about engine and fuel/propulsion system. The maker issued 1 service bulletins for this year. Details by component below, with sources.

Key figures

Owner complaints: 2
Technical service bulletins (TSB): 1

What fails most often

1 Engine 50% of all complaints
2 Fuel/propulsion system 50% of all complaints
3 Powertrain 50% of all complaints
4 Structure 50% of all complaints

Circle size and colour show each component’s share of NHTSA complaints. Schematic only, not a drawing of the exact model.

Engine: 1 complaints (50% of all).
Fuel/propulsion system: 1 complaints (50% of all).
Powertrain: 1 complaints (50% of all).
Structure: 1 complaints (50% of all).

Components owners complain about

Component	Owner complaints	Technical service bulletins (TSB)
Engine	1	0
Fuel/propulsion system	1	0
Powertrain	1	0
Structure	1	0
Exterior lighting	0	1

What owners report

Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.

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.
Engine · 2021-07-24 · NHTSA complaint #11426274
Upon our return to lazydays, the service representative pointed out that a second new crack had developed on the passenger side, trailing from below the passenger window heading towards the door frame (see picture).
Structure · 2021-05-13 · NHTSA complaint #11416422

Comparison

By complaint count this model year ranks 19,879 of 36,656 model years in the NHTSA data (among the 46% least complained about).

On average one model year of the Allegro has 3 complaints (39 years in the data). This year has 2, below average.

What to check before buying

Engine. Cold start, unusual noises, oil leaks and engine codes.
Fuel/propulsion system. Fuel smell, leaks, rough running, fuel-system codes.
Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Structure. Rails, pillars, panel gaps, signs of pulling or welding.

Manufacturer service bulletins

Bulletin titles as filed with NHTSA.

received by NHTSA in 2025–2026 · № 11019966 · Exterior lighting Stopped using the lights we had been using due to expense
Replaced with these, but these new lights have to be wired in instead of just clicking in. These are the instructions to wire in.

Questions and answers

What are the most common problems with the 2019 Tiffin Allegro?

Owner complaints to NHTSA most often mention: engine, fuel/propulsion system, powertrain. Total complaints: 2. The most frequent symptoms in complaint texts: windows, sunroof (50%).

How many service bulletins (TSB) were issued for the 2019 Tiffin Allegro?

NHTSA lists 1 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.

Should I buy a 2019 Tiffin Allegro from a US auction?

Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.

Other 2019 models

Read also

Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.