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Engine coolingPart report

2015 Ram Promaster Engine cooling Problems

Complaints
3about this part
Share
5%of 61 total for the year
Median mileage
78,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 3 complaints about the engine cooling of the 2015 Ram Promaster, 5% of the 61 complaints for this model year. Where a mileage was given, the median is 78,000 miles.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“My exact vehicle Ram Promaster i4 3l turbo diesel with factory air is on a safety recall for bad coolant fan, but chrysler is saying that my VIN does not qualify. The chrysler dealer tells me I need to replace my cooling fan because it is shorting and blowing the fuse and possibly affecting the relay also. This fan code is also putting the van in limp mode and not allowing the diesel particulate filter to be regenerated. …”

NHTSA complaint #11331218, filed 2020-06, 58,000 miles

“The contact owns a 2015 Ram Promaster 3500. The contact stated that while driving 70-75 MPH, the DEF warning light was illuminated. The contact added DEF fluid to the tank and continued driving; however, a message indicating that the vehicle was in countdown mode or LIMP mode was displayed. The vehicle was taken to the dealer to be diagnosed; however, the dealer had informed the contact that the cause of the failure could not be determined after performing several tests. The vehicle remained stuck in LIMP mode and had remained at the dealer unrepaired for two months. …”

NHTSA complaint #11707980, filed 2025-12, 98,000 miles

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
20231516%
202223%
202176%
2020512%
2019712%
201813%
201747%
201613%
201535%
201411%

Other parts of the 2015 Ram Promaster

Electrical system
17 complaints
Engine
16 complaints
Transmission and drivetrain
12 complaints
Brakes
10 complaints
Fuel system
4 complaints
Other or unknown
4 complaints
Vehicle speed control
3 complaints
Electronic stability control
2 complaints
Exterior lighting
2 complaints
Body and structure
2 complaints
Visibility (wipers, defrost, mirrors)
2 complaints
Wheels
2 complaints

← All problems reported for the 2015 Ram Promaster

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology