2018 RAM Promaster: common problems

The maker issued 180 service bulletins for this year. Details by component below, with sources.

Key figures

Technical service bulletins (TSB): 180

Components owners complain about

Component	Owner complaints	involving a crash	Technical service bulletins (TSB)
Electrical system	0	0	38
Equipment	0	0	38
Powertrain	0	0	38
Engine and cooling	0	0	33
Structure	0	0	30
Engine	0	0	21
Visibility	0	0	12
Parking brake	0	0	7
Backover prevention	0	0	6
Service brakes	0	0	6
Suspension	0	0	6
Fuel system	0	0	4
Exterior lighting	0	0	2
Steering	0	0	2

Comparison

What to check before buying

Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
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 · № 11035323 · Powertrain Flash
Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle exhibit/set SYMPTOM: one or more of the following Diagnostic Trouble Codes (DTCs): ●…
received by NHTSA in 2025–2026 · № 11033975 (+3 with the same text) · Structure Outside Power Fold Rearview Mirror Noise Or Loose At Pivot
Mirror Contacts Door Window Glass In The Folded Position.
received by NHTSA in 2025–2026 · № 11027837 (+1 with the same text) · Engine Water Pump & Chain Case Cover
received by NHTSA in 2025–2026 · № 11027731 (+2 with the same text) · Electrical system STARTER - ENGINE
received by NHTSA in 2025–2026 · № 11026584 (+4 with the same text) · Electrical system CAMERA – REAR VIEW
received by NHTSA in 2025–2026 · № 11025028 · Engine Engine Oil Leak
received by NHTSA in 2025–2026 · № 11024312 · Other High Voltage Air Conditioning Refrigerant Dye
received by NHTSA in 2025–2026 · № 11022027 (+1 with the same text) · Other Verify Reman part number availability. Order the "R" part number for all orders
Warranty, Mopar, customer pay and service contract. Order "68" part number for New unsold units only.
received by NHTSA in 2025–2026 · № 11021043 (+2 with the same text) · Engine Engine Rattle Noise
received by NHTSA in 2025–2026 · № 11020600 (+2 with the same text) · Electrical system Decreased Remote Start And RKE Range
Tire Pressure Sensors Values Are Not Displayed
received by NHTSA in 2025–2026 · № 11017445 (+1 with the same text) · Other ACTUATOR - A/C AND HEATER
received by NHTSA in 2025–2026 · № 11015297 · Engine Engine Noise

NHTSA lists 180 bulletins for this year; the 12 newest are shown here.

Other years of this model

Questions and answers

What are the most common problems with the 2018 RAM Promaster?

There are no owner complaints in the NHTSA data for this year; the data comes from 180 manufacturer service bulletins.

How many service bulletins (TSB) were issued for the 2018 RAM Promaster?

NHTSA lists 180 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 2018 RAM Promaster 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 2018 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 2026-11-04.