AI Damage2006 Tiffin Allegro BUS: common problems
Owners of the 2006 Tiffin Allegro BUS filed 3 complaints with NHTSA, most often about engine and cooling and powertrain. Details by component below, with sources.
Key figures
- Owner complaints
- 3
What fails most often
- 1 Engine and cooling 67% of all complaints
- 2 Powertrain 33% of all complaints
- Engine and cooling: 2 complaints (67% of all).
- Powertrain: 1 complaints (33% of all).
Symptoms owners describe
How many of the 3 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Engine and cooling | 2 | 0 | 0 |
| Powertrain | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
The wrist pin failed while driving on la 1 about to turn onto i49 causing catastrophic engine failure. The engine had to be replaced. Contacted tiffin about it and local cummins dealer at time of failure. Tiffin was unaware of recall and local cummins dealer would not work on the motor home.
Isl cm850 engine stop engine now and other problems. Customer states that the #6 wrist pin was bad. The wrist pin was replaced. Then consumer was informed that the manifold gasket was out of line. That was realigned. Once the gasket was re-adjust, the engine knock disappeared.
Dt*: the contact stated when the motor home was exposed to hot weather there were strong fumes present believed to be formaldehyde. The fumes were very irritating to the eyes of all occupants. The contact's spouse was hospitalized for five days due to respiratory problems, asthma, pneumonia and a collapsed lung.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 17,150 of 36,656 model years in the NHTSA data (top 47% most complained about).
On average one model year of the Allegro BUS has 1 complaints (23 years in the data). This year has 3, above average.
What to check before buying
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Other years of this model
Questions and answers
What are the most common problems with the 2006 Tiffin Allegro BUS?
Owner complaints to NHTSA most often mention: engine and cooling, powertrain. Total complaints: 3. The most frequent symptoms in complaint texts: engine failure or replacement (33%), knocking, grinding or other noise (33%).
How many service bulletins (TSB) were issued for the 2006 Tiffin Allegro BUS?
NHTSA lists 0 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 2006 Tiffin Allegro BUS 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 2006 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.