2018 RAM 3500 Reliability ReportCommon Problems, Repair Costs & Expert Verdict
Quick Facts · 2018 RAM 3500
- Has 11 NHTSA recalls on record — the most notable involves the steering:linkages.
- Outscores the 2016 RAM 3500 by 10 points — one of the stronger nearby years to consider.
- The system most likely to surface first: diesel emissions system (major severity).
Should You Buy the 2018 RAM 3500?
The 2018 RAM 3500 is an incredibly capable and generally robust heavy-duty truck, making it a strong contender for those needing serious towing and hauling power. While not without the inherent complexities and costs of any modern diesel HD vehicle, a well-maintained example, particularly with the Cummins engine, offers a dependable workhorse platform. This is a solid investment if you're prepared for the specialized maintenance required.
The 2018 RAM 3500, especially with the Cummins diesel and Aisin transmission, is a truly dependable heavy-duty truck capable of immense work. Its core components are built to last, providing you invest in meticulous, proactive maintenance, particularly around the diesel emissions and front suspension. If you need a…
Best Model Years
2017-2018 (end of 4th gen improvements), 2020+ (5th gen refinements)
Years to Avoid
None specifically, but earlier models of any new generation (e.g., 2010-2012 for the 4th gen's initial diesel emissions) might have more early issues.
Biggest Strengths
- Exceptional towing and hauling capacity
- Robust frame and driveline components
- Proven Cummins diesel engine durability
Top Risk Areas
The systems that tend to fail first on the 2018 RAM 3500, with the typical mileage window when each becomes a concern. Detailed repair-cost ranges and exact what-to-check inspection notes are in the full report.
The Diesel Particulate Filter (DPF), Selective Catalytic Reduction (SCR) with DEF, and Exhaust Gas Recirculation (EGR) systems are prone to clogging, sensor failures, and component wear, especially with extensive idling or short-trip dri…
Heavy loads and large tires accelerate wear on front-end components. Ball joints, tie rods, track bar, and steering gearboxes are common failure points, leading to wandering steering, excessive play, and potentially the dreaded 'death wo…
While less common than emissions issues, the high-pressure fuel pump (CP3/CP4 depending on engine variant and build date) or fuel injectors can experience failures, particularly if contaminated fuel is used or fuel filter maintenance is…
2018 RAM 3500 Mileage Danger Zones
The mileage windows when the 2018 RAM 3500 most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Low Risk Zone
At this mileage, the truck is still relatively new. Focus should be on basic maintenance, tire rotation, fluid checks, and addressing any initial warranty items or minor manufacturing defects.
Maintenance Zone
This mileage marks an increase in routine service items, including differential fluid changes, transmission service (especially if towing), and closer inspection of tires and brakes. Early signs of emissions system issues or front-end we…
Elevated Risk Zone
Component wear becomes more prevalent here. Expect potential replacement of wear items like ball joints, tie rods, and possibly the first significant emissions system repair if not properly maintained. Fuel filter maintenance is critical…
High Risk Zone
Beyond this point, the risk of major component failures increases, particularly with the diesel emissions system and potentially high-pressure fuel system components. Diligent maintenance history is crucial for continued reliability. Exp…
2018 RAM 3500 Ownership Cost Outlook
What it typically costs to keep the 2018 RAM 3500 on the road. Full 5-year cost-of-ownership projection and major-failure-risk forecast are in the report.
Annual Maintenance
$600-1,000
Moderate Repairs
$800-2,500 occasionally
How Long Does the 2018 RAM 3500 Last?
For maximum longevity, adhere strictly to the manufacturer's severe-duty maintenance schedule, especially for fluid changes and filter replacements. Do not defer diesel emissions system repairs; address them promptly to prevent cascading failures.
What 2018 RAM 3500 Owners Actually Say
What Owners Love
- Unmatched towing and hauling capabilities for serious work.
- Comfortable and well-appointed interior, especially in higher trims.
- Powerful engine options, particularly the legendary Cummins diesel.
- Imposing road presence and rugged, attractive styling.
Common Frustrations
- Poor fuel economy, especially with the gas engine or when towing.
- Expensive and complex diesel emissions system maintenance and potential failures.
- Rough ride quality when unloaded, typical for a heavy-duty truck.
- Large size makes it challenging to park and maneuver in urban environments.
Who Should Buy the 2018 RAM 3500?
Best For
- Farmers and ranchers needing to tow large livestock or equipment.
- Construction contractors hauling heavy trailers and materials.
- Fifth-wheel or large travel trailer owners for comfortable long-distance towing.
Not Ideal For
- Daily drivers in urban or congested areas due to size and fuel economy.
- Budget-conscious owners seeking low operating and repair costs.
How the 2018 RAM 3500 Compares to Rivals
The 2018 RAM 3500 stands shoulder-to-shoulder with its Detroit rivals, the F-350 and Silverado/Sierra HD, offering competitive power, capability, and reliability. Its Cummins engine is often cited for superior longevity compared to some competitors' diesels, though all modern…
More Reliable Than
- Older generation heavy-duty trucks (pre-2010 emissions)
- Some less common HD brands (e.g., Nissan Titan XD for true HD tasks)
Comparable To
- 2018 Ford F-350 Super Duty (6.7L Power Stroke)
- 2018 Chevrolet Silverado 3500HD / GMC Sierra 3500HD (6.6L Duramax)
NHTSA Recalls
11 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
STEERING:LINKAGES
Streetcar ORV LLC (Streetcar) is recalling certain American Expedition Vehicles (AEV) 3" Dualsport aftermarket suspension kits, part numbers N0436000 and N0436001, sold for installation on 2013-2018 RAM 2500 and 3500HD trucks. Improper installation and machining of the original equipment steering knuckle may weaken the joint between the steering drag link and knuckle.
LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH
Chrysler (FCA US LLC) is recalling certain 2015-2017 Ram 1500, 2500 and 3500 pickup trucks equipped with an 8 foot bed and a power locking tailgate. Chrysler is also recalling all 2013-2014 and 2018 Ram 1500, 2500 and 3500 pickup trucks built before April 1, 2018 with a 6 or 8 foot bed and a power locking tailgate. On August 29, 2019 Chrysler expanded the recall to include an additional 693,128 model year 2013-2014 Ram 1500, 2500 and 3500 pickup trucks. The tailgate actuator limiter tab may fracture and cause the tailgate to unlatch and open while driving.
What breaks on the 2018 RAM 3500?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
OwnerKeep Passport · $499 · one-time
Just bought a 2018 RAM 3500? Keep it that way.
Snap a receipt — AI logs it. Build an OwnerScore. Sell with a buyer-ready Passport dossier.
RAM 3500 by Year
Compare KeepScores across nearby years of the RAM 3500. Click any year for its full report.
If You're Considering This, Also Look At
Similar class, similar year range — ranked by KeepScore.
Relevant Products for Your 2018 RAM 3500
Parts and accessories matched to your 2018 RAM 3500
As an Amazon Associate I earn from qualifying purchases.
Frequently Asked Questions
Related Comparisons
Just bought a 2018 RAM 3500? Keep it that way.
OwnerKeep Passport turns your RAM 3500's care history into a luxury digital vault — AI-logged receipts, an OwnerScore that pays at resale, and a buyer-ready dossier in one tap.
- AI receipt OCR — snap and log
- Fuel & mileage tracker
- Tri-Score OwnerScore
- One-tap resale dossier PDF
Recommended Reading for the RAM 3500
Most Reliable Cars to Buy Used (Top 10 Ranked)
Get our expert-ranked list of the 10 most reliable used cars you can buy today, saving money and avoiding future headaches with smart choices.
Jeep Wrangler vs Toyota 4Runner: Which Lasts Longer?
Get the definitive answer: Which truly lasts longer, the Jeep Wrangler or Toyota 4Runner? Our comparison reveals their long-term durability.
Toyota Tacoma vs Chevy Colorado: Reliability Compared
Explore a head-to-head reliability comparison of the Toyota Tacoma vs. Chevy Colorado. Discover which truck truly stands out for long-term dependability.