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2025 RAM 1500 Classic Problems: 2 Known Issues

2025 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2025 RAM 1500 Classic has 2 documented known issues, with 1 rated critical. The most serious is MDS Lifter Failure and Hemi Tick (5.7L) ($2,000-$4,500 repair). Across all issues with published estimates, repair costs range from $400 to $4,500. DIY maintenance guides at au7o.io.

In This Article

  • 1500 Classic Engine1
  • 1500 Classic Exhaust1
  • FAQ
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In This Article

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  • Exhaust1
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All 2 Known Issues

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On the 2019-2025 RAM 1500 Classic 5.7 HEMI, the 5.7L Hemi V8 uses Multi-Displacement System (MDS) hydraulic lifters to deactivate four cylinders during light-load cruising. The MDS lifters are known to fail, causing a persistent ticking noise (the infamous "Hemi tick") and misfires on the deactivated cylinders. When an MDS lifter collapses or sticks, it cannot properly deactivate and reactivate the valve, leading to a dead cylinder. In severe cases, a failed lifter can damage the camshaft lobe, requiring a complete top-end rebuild.

This issue also affects: Chrysler 300, Chrysler Aspen, Chrysler Cirrus

Common Symptoms

  • Persistent ticking noise from engine that does not change with temperature
  • Misfire on one or more cylinders (P0300 series codes)
  • Check engine light
  • Rough idle
  • Loss of power under acceleration
  • Ticking intensifies during MDS cylinder deactivation mode

How to Fix

Replace all 16 lifters (8 MDS and 8 standard) with either OEM or upgraded non-MDS lifters. Many owners delete the MDS system entirely using a non-MDS camshaft, standard lifters, and an MDS delete tuner/programmer — this eliminates the failure mode at the cost of 1-2 mpg. If the camshaft has been damaged, it must be replaced during the lifter job. This is a significant repair requiring intake manifold removal and valley pan access.

Typical repair cost:$2,000 - $4,500

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On the 2019-2025 RAM 1500 Classic 5.7 HEMI, the 5.7L Hemi V8 in the 1500 Classic is prone to exhaust manifold bolt breakage, particularly on the rear bolts of the driver-side (left) manifold. The bolts are subjected to extreme heat cycling and eventually fatigue and snap. When bolts break, the manifold develops an exhaust leak that sounds like a ticking or tapping noise, especially on cold start. The noise typically diminishes as the engine warms and the manifold expands to temporarily seal the gap. This issue has affected Hemi engines across multiple generations.

This issue also affects: Chrysler 300, Chrysler Aspen, Dodge Challenger

Common Symptoms

  • Ticking or tapping noise from engine on cold start that fades when warm
  • Exhaust smell in cabin when stopped or at idle
  • Slight loss of power
  • Exhaust leak noise audible from driver side of engine
  • Check engine light with exhaust-related codes in severe cases

How to Fix

Replace broken exhaust manifold bolts with updated high-strength bolts from Stellantis. Extracting broken bolt studs often requires drilling and using an EZ-out or bolt extractor — apply penetrating oil (PB Blaster) generously before attempting removal. Some shops weld a nut onto the broken stud for easier extraction. Replace the exhaust manifold gaskets at the same time. Consider upgrading to ARP exhaust manifold studs for a permanent fix.

Typical repair cost:$400 - $1,200

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Frequently Asked Questions

What are the most common RAM 1500 Classic problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2025 RAM 1500 Classic has 2 documented issues. The most frequently reported are: MDS Lifter Failure and Hemi Tick (5.7L), Exhaust Manifold Bolt Breakage (5.7L Hemi). Of these, 1 is rated critical and should be addressed promptly.

Is the RAM 1500 Classic reliable?

The 2025 RAM 1500 Classic has 2 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 1 issue is rated critical: MDS Lifter Failure and Hemi Tick (5.7L). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common RAM 1500 Classic problems?

Repair costs for known RAM 1500 Classic issues range from $400 to $4,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, MDS Lifter Failure and Hemi Tick (5.7L), typically costs $2,000-$4,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2019-2025 RAM 1500 Classic MDS Lifter Failure and Hemi Tick (5.7L)?

The 5.7L Hemi V8 uses Multi-Displacement System (MDS) hydraulic lifters to deactivate four cylinders during light-load cruising. The MDS lifters are known to fail, causing a persistent ticking noise (the infamous "Hemi tick") and misfires on the deactivated cylinders. When an MDS… Repairs typically run $2,000-$4,500. Severity: high.

What is the 2019-2025 RAM 1500 Classic Exhaust Manifold Bolt Breakage (5.7L Hemi)?

The 5.7L Hemi V8 in the 1500 Classic is prone to exhaust manifold bolt breakage, particularly on the rear bolts of the driver-side (left) manifold. The bolts are subjected to extreme heat cycling and eventually fatigue and snap. When bolts break, the manifold develops an exhaust… Repairs typically run $400-$1,200. Severity: medium.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.