Chrysler introduced the Multi-Displacement System (MDS) in 2005 on the 5.7L HEMI V8. It later expanded to the 6.4L HEMI V8. MDS deactivates 4 cylinders under light load to improve fuel economy. Known issues include lifter roller failures, camshaft wear, and ticking noises. Manual transmission HEMI models do not use MDS.
| Ref ID | Year(s) | Make | Model | Should Purchase? | Reason | Notes |
|---|---|---|---|---|---|---|
| 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 | Chrysler | 300C, Aspen | 5.7L HEMI V8 MDS | EZB, ESG | Lifter/cam failures, ticking noise | |
| 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 | Dodge | Charger, Magnum, Durango, Challenger | 5.7L HEMI V8 MDS | EZB, ESG | Common MDS lifter roller failures | |
| 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 | Ram | 1500 | 5.7L HEMI V8 MDS | EZB, ESG | Ticking, lifter collapse, cam wear | |
| 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 | Jeep | Grand Cherokee, Commander | 5.7L HEMI V8 MDS | EZB, ESG | Same MDS-related failures | |
| 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 | Dodge | Charger SRT, Challenger SRT | 6.4L HEMI V8 MDS | ESG, ESF | Lifter roller failures, camshaft wear | |
| 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 | Jeep | Grand Cherokee SRT | 6.4L HEMI V8 MDS | ESG, ESF | Ticking, lifter collapse | |
| 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 | Ram | 2500, 3500 (non-HD trims) | 6.4L HEMI V8 MDS | ESG, ESF | Same MDS-related failures |
Chrysler/Stellantis MDS engines include the 5.7L HEMI (EZB, ESG) and 6.4L HEMI (ESG, ESF). These engines are found in Chrysler 300C, Dodge Charger/Challenger/Durango/Magnum, Ram 1500/2500/3500, and Jeep Grand Cherokee/Commander. Issues include lifter roller collapse, camshaft wear, and ticking noises. Manual transmission HEMI models do not use MDS.