You’ll want to steer clear of RAM EcoDiesel models from 2014-2016 and 2019-2020 due to critical defects. These years suffer from catastrophic Bosch CP4.2 fuel pump failures, EGR cooler cracks causing fire risks, and severe oil cooler problems that mix coolant with oil. Repair costs often exceed $8,000 when these systems fail. The 2014-2016 models also exhibit dangerous “death wobble” at highway speeds. Understanding the specific mechanical issues can help protect your investment.
High-Risk Model Years to Avoid
While all RAM EcoDiesel models have their quirks, the 2014-2016 model years stand out as particularly problematic due to critical component failures. You’ll want to exercise extreme buyer caution with these models, especially the 2016 RAM 1500, which accumulated 1,278 complaints and 17 recalls. The notorious Bosch CP4.2 fuel pump self-destruction issue leads to system-wide metal contamination, triggering repairs between $3,000-$6,000. EGR cooler cracks present serious fire risks, while fuel tank strap corrosion threatens tank detachment. These models frequently experience oil and coolant mixing when the oil cooler fails, leading to catastrophic engine damage. Similar to the spark plug blowouts that plagued early Ford Expeditions, these RAM models suffered from multiple mechanical failures. Much like the transmission failures that affected Nissan Rogues, these RAM years faced serious reliability concerns. In model comparisons, these years consistently rank poorest for reliability, plagued by transmission failures, ABS control module issues, and persistent emissions problems. The 2014-2016 EcoDiesels simply carry too many expensive failure points to justify the investment.
Major Mechanical Issues by Production Year
The mechanical issues plaguing RAM EcoDiesel models follow distinct patterns across production years, with specific components failing at predictable intervals. You’ll find 2014-2016 models suffering from oil cooler and EGR cooler failures, particularly under heavy towing capacity loads. The Bosch CP4.2 fuel pump catastrophically fails in 2014-2019 models, contaminating the entire fuel system with metal debris. Engine maintenance becomes critical in 2014-2018 models due to bottom-end bearing failures and connecting rod issues, often occurring before 20,000 miles. Drivers report experiencing dangerous death wobble conditions when hitting bumps at highway speeds. While 2020-2023 models show improvement, they’re still prone to oil pump failures and emissions-related recalls. Across all years, DEF sensor problems and timing chain stretch remain persistent concerns, though proper maintenance can mitigate these risks considerably.
Critical Recall History and Coverage
Since their introduction, RAM EcoDiesel models have faced multiple critical recalls affecting both safety and performance. You’ll find three major recall implications affecting these trucks: the high-pressure fuel pump failures in 2014-2019 models, crankshaft position sensor tone wheel delamination issues spanning 2014-2020, and newer fuel pump problems in 2020-2022 vehicles. The latest recall campaign affects over 45,711 vehicles with EcoDiesel engines manufactured between late 2021 and early 2023.
The safety concerns are significant – metal debris contamination from failing fuel pumps can cause catastrophic engine damage, while sensor delamination leads to unexpected stalling. If you’re considering a used EcoDiesel, check the VIN for open recalls immediately. Repair costs outside warranty coverage can exceed $8,000, particularly for fuel system damage. The 2014-2016 models face additional complications from emissions modifications that may impact performance and fuel economy.
Understanding Performance Impacts After Updates
Performance impacts after EcoDiesel updates reveal distinct generational differences between early and later models. The 2020 refresh brought significant performance enhancements, boosting output to 260 horsepower and 480 lb-ft torque while improving fuel economy to 32 mpg highway. You’ll find these updates addressed earlier reliability concerns, with post-2017 models showing drastically reduced failure rates.
The second-generation engine’s emissions compliance upgrades incorporated enhanced SCR and DEF systems, meeting stricter Euro 6 and US Tier 3 standards. While these additions increased maintenance complexity, they didn’t compromise performance metrics. Similar to how transmission failures plagued multiple Honda Pilot generations, some EcoDiesel years required extensive repairs. The newer powerplant’s weight reduction and drivetrain improvements delivered better responsiveness, making 2020-2023 models more capable for both daily driving and towing duties up to 9,600 pounds.
Similar to the valve seat problems that plagued early 4th gen Cummins engines, pre-2017 EcoDiesel models experienced various mechanical issues that required careful consideration before purchase.
Best and Worst Years for Reliability
While RAM EcoDiesel reliability varies considerably across production years, specific model years emerge as clear winners and losers. You’ll want to avoid the 2019-2020 models due to widespread CP4 fuel pump failures that affected roughly 60,000 vehicles. Early second-generation engines suffered from EGR cooler issues that compromised engine longevity. The 2014-2015 models showed mixed results with some engine failures reported.
On the reliability front, post-2016 models benefited from vital updates that enhanced fuel efficiency and system robustness. The 2021 Ram 1500 EcoDiesel stands out as particularly dependable, with proper maintenance potentially yielding 300,000 miles of service. The 2020 upgraded version also delivered improved performance with its redesigned engine block and enhanced emissions technology.
