AutoStatsIQ
Data through Oct 2026
Model year

2018 Tiffin Allegro BUS

Other, diesel, built in United States. Owner complaints on file from Oct 1, 2021 to Oct 1, 2021.

Recalls (2)Complaints (1)Investigations (0)Bulletins (2)
Recall campaigns covering this model year212k vehicles or units across those campaigns
Owner complaints1Below the median 2018 other
Severity index0.02018 others average 4.1
First 24 months0Complaints in its first two years
Complaints over time

Complaints about the 2018 Tiffin Allegro BUS peaked in 2021, with 1 filed

Owner complaints about this model year, by the year they were filed with NHTSA.

00.250.50.7512021120222023202420252026
Source: NHTSA ODI complaints file. The lighter column runs through October.
Components

100% of complaints about the 2018 Tiffin Allegro BUS name fuel system

Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.

Fuel system
1
Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls

2 recall campaigns cover the 2018 Tiffin Allegro BUS

Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.

Recall campaigns for the 2018 Tiffin Allegro BUS
CampaignFiledSubjectComponentVehiclesRemedy
23V-643Sep 20, 2023240-Volt induction cooktop may not be grounded, which can create an electrical shock hazard if the wires short-circuitEquipment1,188Repair or modification
21V-680Nov 5, 2021Sofa seat belts may not have been installed correctly, which could result in unsecured passengersSeat belts10,409Repair or modification
Source: NHTSA ODI recalls file.
Look up a VIN at NHTSA
Owner complaints

What owners reported about the 2018 Tiffin Allegro BUS

The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.

1 complaint on file, page 1 of 1.

  1. Filed Oct 1, 2021Failure Oct 1, 20208,000 milesTemecula, CAFuel system, Diesel

    The contact owns a 2018 Tiffin Allegro Bus. The contact stated that while driving at various speeds, the vehicle would independently downshift as the Diesel Exhaust Fluid (DEF) warning light would illuminate. The manufacturer was notified of the failure and the contact was informed that they were aware of the failure; however, parts for the repair was unavailable. The vehicle had yet to be repaired. The failure mileage was approximately 8,000.

    NHTSA complaint 11435124
Source: NHTSA ODI complaints file.
Investigations

NHTSA has not opened an investigation on this model year

Source: NHTSA ODI investigations file.
All investigations
Service bulletins

2 manufacturer communications cover this model year

Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall.

  • MCD-009 Jun 9, 2025 · Other
    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.
  • CSA-036 Apr 19, 2024 · Service Bulletin/Repair Instructions
    Faulty DEF sensors that due to shortage were not replaced. Instead engine software was temporarily modified to account for continued operation with a faulty sensor until replacement sensors were available. This campaign will install an engine control modu…
Source: NHTSA manufacturer communications files.
About service bulletins