There are 1 stored owner reports matching the suspension leading-label group for the 2021 Ram ProMaster in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 1 of 1 matching reports.
Open the full vehicle complaint log (all categories)Vehicle bottomed out and lodged on concrete entering driveway. Thor Scope Ram Promaster 1500 Chassis sits low and Thor installed Cummins Onan generator and 2 Trojan batteries under the chassis, that sit 2 or more inches below the rear axle against the Cummins install guidelines. The generator needs 6 to 8 inches for ventilation according to manual and RV mechanics. Both generator and batteries collocated together coming in contact with road debris, objects, water on roadways may cause critical failure of systems resulting in hazardous conditions (stalling, loss of control, fire, explosion) to drivers.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.