MAN Engines Debuts D3872 V12 Marine Engine at SMM 2026 with Lower Emissions and Remanufacturing Program
MAN Engines will showcase its new 30-liter V12 D3872 marine engine at SMM 2026, offering power outputs from 735 kW to 1,618 kW in multiple emission certifications.
- 72%
- 1,618 kW
- 30 liters
- 800-960 kW
What Happened
MAN Engines will present an expanded portfolio for marine workboat applications at SMM 2026 in Hamburg from September 1-4. The centerpiece is the new 30-liter V12 MAN D3872 engine, shown for the first time in versions for auxiliary power, diesel-electric propulsion, and heavy-duty operation. The company also displays a modular exhaust aftertreatment system and a remanufactured original MAN engine.
- 800 kW / 840 kW / 960 kW
- 735 kW / 920 kW
- 1,471 kW / 1,618 kW
- IMO Tier II (no aftertreatment)
- IMO Tier III (with modular SCR system)
- EU Stage V (with SCR and DPF)
- EPA Tier 3 (for light-duty)
- EPA Tier 4 (for medium-duty)
The modular exhaust aftertreatment system combines a diesel particulate filter (DPF) and SCR system, designed specifically for marine integration. It enables EU Stage V compliance for both generator and heavy-duty operation. MAN Engines develops engine, aftertreatment, and controls as a fully certified system for reliability and efficiency.
MAN Engines also showcases its remanufacturing service, which restores used marine engines to like-new condition with the same warranty as a new engine. A study on the MAN D2842 found that remanufacturing saves up to 72% CO₂ compared to producing a new motor, while reducing material consumption. The service follows standardized MAN quality processes.
Why this matters
The D3872 expands MAN's offering in the 30-liter segment, giving marine operators a single-engine platform for auxiliary, diesel-electric, and heavy-duty applications. With options from IMO Tier II to EU Stage V, it helps meet tightening emissions regulations. The remanufacturing program enables up to 72% CO₂ savings compared to new production, appealing to buyers focused on lifecycle costs and sustainability.
Terms in This Story
- SCR
- Selective Catalytic Reduction, a post-combustion technology that reduces nitrogen oxide emissions by injecting urea into the exhaust stream.
- DPF
- Diesel Particulate Filter, a device that captures soot particles from diesel exhaust.
- IMO Tier II/III
- International Maritime Organization emission standards for nitrogen oxides from marine engines; Tier III requires additional aftertreatment.
- EU Stage V
- European Union emission standard for non-road mobile machinery, including marine engines, requiring both SCR and DPF.
Summarised from the linked release; details can be imperfect — always verify against the original source.