2018 Ram ProMaster Battery Size & Group
AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.
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Quick answer
- BCI Group Size: H7/94R
- Cold Cranking Amps (CCA): 800-850
- Reserve Capacity (RC): 140-150 minutes
- AGM vs Flooded: AGM Required
- Terminal Layout: Right-hand positive
- Physical Dimensions: 12.4 x 6.9 x 7.5 inches (315 x 175 x 190 mm)
- Diesel dual-battery setup: Not applicable
Replacement battery options
- Interstate MTX-94R/H7
- Optima DH7
- DieHard Platinum AGM 94R/H7
- Odyssey 94R-850
- ACDelco 94RAGM
AGM vs flooded — which does this vehicle need?
The 2018 Ram ProMaster requires an absorbed glass mat (AGM) battery. The ProMaster's battery is located under the driver's side floor, which is a non-vented location. AGM batteries are sealed and do not release hydrogen gas like traditional flooded batteries, making them the only safe option for this location.
Post-installation relearn / reset procedure
After a battery replacement, the 2018 Ram ProMaster does not require a specific reset or relearn procedure. However, it is good practice to let the vehicle idle for a few minutes to allow the engine control unit (ECU) to relearn the idle trim and other parameters.
Signs of a failing battery
- Slow engine crank
- Clicking sound when turning the key
- Dimming headlights or interior lights
- Warning lights on the dashboard
- Corrosion on the battery terminals
Common battery issues for this generation
The most common battery issue for this generation of Ram ProMaster is premature failure due to the high electrical demands of the vehicle. The ProMaster is often used as a work vehicle with many accessories, which can put a strain on the battery. It is important to choose a high-quality AGM battery and to make sure that the battery is properly maintained.
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More specs for the 2018 Ram ProMaster
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2018 Ram ProMaster Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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