Mitsubishi S6R & S12R Turbocharger Guide — Generator Set, Marine & Fuso Truck OEM Parts | HHX PARTS

Mitsubishi Heavy Industries Engines: From Generator Sets to Fuso Trucks

Mitsubishi Heavy Industries (MHI) produces one of the most diverse diesel engine ranges in the world — spanning compact light commercial engines used in Mitsubishi Fuso trucks and vans, through mid-range industrial and marine engines, to the large S6R y S12R generator set and marine propulsion engines that power critical infrastructure across Southeast Asia, Africa, and the Middle East.

The turbocharger replacement market for Mitsubishi diesel engines covers two distinct segments that require very different sourcing approaches: the large industrial/marine segment (S6R, S12R, S16R — high-value, low-volume, long lead times from OEM channels) and the light commercial and industrial segment (4D56, 4D34, 6D22T3, S6S — high-volume, widely available, multiple quality tiers in the aftermarket).

At Piezas HHX, we supply turbochargers across both segments, with particular depth in the Mitsubishi Fuso light commercial and medium truck range. This guide covers the full Mitsubishi turbocharger landscape — from the S6R/S12R genset platform through to the Fuso 4D56, 4D34, and 6D22 truck and bus engines.

Mitsubishi Engine Family Overview

S6R and S12R — The Large Generator Set Platform

The Mitsubishi S6R and S12R are among the most widely installed large diesel generator set engines in Southeast Asia, the Pacific Islands, and parts of Africa and the Middle East. MHI-branded gensets in the 500–2,000 kVA range are commonly found in hospitals, data centres, airports, mining operations, and island power supply installations across these regions.

S6R Turbocharger Specifications

The S6R uses a single large turbocharger (or twin turbos on higher-power variants) with charge air intercooling. Key OEM references:

• Turbocharger model: MHI TD/TF-series large frame (proprietary IHI-supplied units)
• Primary OEM part numbers: 49181-03872 / 49181-03882 (S6R-PTA / S6R2-PTA)
• Variant coverage: S6R-PTA, S6R-MPTA, S6R-Y1MPTA, S6R2-Y1MPTA
• Power ratings covered: 588–735 kW (800–1,000 HP) at 1,500 / 1,800 RPM

S12R Turbocharger Specifications

The S12R V12 uses twin turbochargers — one per bank of six cylinders — with intercooling between the turbo and each bank’s intake manifold. Both turbochargers must be replaced as a matched pair to maintain balanced boost across both cylinder banks.

• Turbocharger model: MHI/IHI TD-series, twin installation
• Primary OEM part numbers: 49182-03471 / 49182-03481 (S12R-PTA / S12R-PTAA2)
• Variant coverage: S12R-PTA, S12R-PTA2, S12R-PTAA2, S12R-MPTAW, S12R-Y1PTAW
• Power ratings covered: 1,029–1,618 kW (1,400–2,200 HP) at 1,500 / 1,800 RPM
• Critical note: always replace both turbos simultaneously on S12R — a new turbo paired with a worn unit causes boost imbalance between banks, accelerating the new unit’s wear

S6R / S12R Turbocharger Sourcing Notes

The S6R and S12R turbocharger market has specific characteristics that buyers must understand:

• Long OEM lead times: genuine MHI/IHI replacement turbochargers typically have 8–16 week lead times from official Mitsubishi service channels — unacceptable for critical power installations where downtime has immediate operational consequences
• High unit value: OEM S6R and S12R turbochargers are among the most expensive single-engine components in the genset market — alternative sourcing from verified suppliers can reduce cost by 30–50% while maintaining performance specifications
• Remanufacturing is viable: unlike smaller turbos, the S6R and S12R turbocharger core (CHRA) can be successfully remanufactured by specialist rebuilders if the housing is undamaged. This is a cost-effective option for operators who cannot justify full replacement cost
• Intercooler inspection is mandatory: any S6R or S12R turbocharger failure must be followed by full intercooler inspection and cleaning — oil contamination of the intercooler core accelerates wear on the replacement unit if not addressed

Mitsubishi Fuso Truck and Commercial Engine Series

The Mitsubishi Fuso range — from the compact Canter light truck to the heavy Super Great — uses a family of Mitsubishi-designed diesel engines with well-established turbocharger specifications and a deep aftermarket supply base.

6D22T3 — Fuso Heavy Truck and Bus

The 6D22T3 is the turbocharged variant of Mitsubishi’s long-running 11.15L inline-6 heavy truck engine, used in Fuso heavy trucks and buses across Asia and Africa. The TD08 turbocharger is OEM fitment:

• Turbo model: Mitsubishi TD08
• OEM part numbers: 28200-84810 / 28200-84811
• Aplicación: Mitsubishi Fuso truck and bus ZQ1343 with 6D22T3 engine

4D34 / 4D34T — Fuso Canter Medium Truck

The 4D34 is Mitsubishi Fuso’s mid-range 4-cylinder engine, powering the Canter FE and FG medium truck range that is ubiquitous in Asian and African urban logistics. Two turbocharger variants are used:

• Turbo models: Mitsubishi TD05H / TD05-12G
• OEM part numbers:
  • ME015065 / 49178-02335 (TD05H) — Mitsubishi 4D34-3AT, 4D34T3, 4D34T4
  • 28230-45500 / 49178-03130 (TD05-12G) — Hyundai Truck Might II with Mitsubishi 4D34T / 4D31 / 4D56 engine

4D56 — Pickup, Van, and Light Commercial

The 4D56 is one of the most widely sold light diesel engines globally — powering the Mitsubishi L200 pickup, Pajero SUV, L300 van, and Delica across multiple generations. It also underpins the Hyundai H1 van and Porter truck in Asian markets. Multiple TD04 variants are used across production years:

• Turbo model: Mitsubishi TD04 (multiple suffix variants)
• Key OEM part numbers:
  • 49177-01515 / 49177-01513 / MR355220 — L300 Star Wagon, Delica 4D56
  • 49177-02513 / MR355225 — L200 Pajero II 2.5 TD
  • 49177-01512 / 49177-01503 / MR355222 — Pajero L200 L300 4D56
  • 49177-01511 / 49177-01500 / MD168053 — Pajero 2.5 TD 4D56

4M50 / Canter F1C (Newer Generation)

The newer Mitsubishi Fuso Canter uses the 4P10 and 4M50 engine family with modern variable geometry turbochargers. Key reference:

• Turbo model: Garrett GTB2056V
• OEM part numbers: 789773-5030S / 789773-0030 / 5801768036 / QC000387
• Aplicación: Mitsubishi Fuso Canter 3.0L F1C / ZQ0951

S6S-DT — Mitsubishi Heavy Forklift

The S6S-DT powers Mitsubishi heavy forklifts in the 3–7 ton class, as well as Yale and Hyundai forklift equivalents. The TD04HL is OEM fitment:

• Turbo model: TD04HL
• OEM part numbers: 49189-03710 / 28200-45C00
• Aplicación: Hyundai S6S-DT, Mitsubishi Forklift, Yale D4D4

HHX PARTS In-Stock Products for Mitsubishi Engines

The following turbochargers for Mitsubishi-powered equipment are available directly from HHX PARTS:

Mitsubishi Fuso Heavy Truck (6D22T3)

• TD08 Turbocharger 28200-84810 / 28200-84811 — For Mitsubishi Fuso truck and bus ZQ1343 with 6D22T3 engine

Mitsubishi Fuso Canter Medium Truck (4D34 / 4P10)

• TD05H Turbocharger ME015065 / 49178-02335 — For Mitsubishi 4D34-3AT, 4D34T3, 4D34T4 engine 3.9L
• TD05-12G Turbocharger 28230-45500 / 49178-03130 — For Mitsubishi 4D34T / 4D31 / 4D56 — Hyundai Truck Might II
• GTB2056V Turbocharger 789773-5030S / 5801768036 — For Mitsubishi Fuso Canter 3.0L F1C / ZQ0951

Mitsubishi L200 / Pajero / L300 / Delica (4D56)

• TD04 Turbocharger 49177-01515 / 49177-01513 / MR355220 — For Mitsubishi L300 Star Wagon, Delica 4D56
• TD04 Turbocharger MR355225 / 49177-02513 — For Mitsubishi L200 Pajero II 2.5 TD
• TD04-10T Turbocharger 49177-01512 / 49177-01503 / MR355222 — For Mitsubishi Pajero, L200, L300 4D56
• TD04 Turbocharger 49177-01511 / MD168053 — For Mitsubishi Pajero 2.5 TD 4D56

Mitsubishi / Yale / Hyundai Heavy Forklift (S6S-DT)

• TD04HL Turbocharger 49189-03710 / 28200-45C00 — For Hyundai S6S-DT / Mitsubishi Forklift / Yale D4D4

For Mitsubishi S6R (49181-03872) and S12R (49182-03471) large generator set turbochargers, contact our technical team directly — we source these to order with competitive lead times significantly shorter than OEM channels. Respond within 24 hours.

Common Applications by Segment

Generator Sets (S6R / S12R)

• MHI / Kohler / SDMO gensets 500–2,000 kVA — hospitals, data centres, airports, mining across Southeast Asia, Pacific Islands, West Africa
• Island power supply — S6R and S12R engines are dominant in Pacific Island grid power applications (Fiji, Papua New Guinea, Solomon Islands, Vanuatu)
• Mining site power — remote mining operations in Indonesia, Philippines, PNG, and parts of Africa
• Marine auxiliary power — S6R-powered vessels in Southeast Asian commercial marine fleet

Trucks and Commercial Vehicles (Fuso Range)

• Mitsubishi Fuso Canter (FE / FG) — the best-selling light-medium truck in Southeast Asia and parts of Africa; 4D34-powered variants remain the most common engine in service
• Mitsubishi Fuso Fighter / Super Great — heavy trucks with 6D22T3 in older generation; widely used in Indonesia, Vietnam, and East Africa
• Mitsubishi L200 / Triton — dominant pickup truck in Southeast Asia and parts of Africa; 4D56 remains in heavy service despite being superseded by newer units in some markets
• Hyundai H1 / Porter — 4D56-powered commercial vans and light trucks across Korea and Asian export markets

Forklifts and Material Handling

• Mitsubishi FD30–FD70 heavy diesel forklifts — S6S-DT engine (TD04HL)
• Yale GDP / GLP 30–70 — S6S-DT engine (same TD04HL)
• Hyundai 30D–70D — S6S-DT engine (TD04HL)

6 Warning Signs Your Mitsubishi Turbocharger Is Failing

1. S6R / S12R genset black smoke during load acceptance — the most visible early symptom on large Mitsubishi gensets. When the generator is switched on and picks up building load, a worn turbocharger cannot maintain boost during the transient — producing a burst of black smoke as the engine over-fuels the available air. This symptom during automatic mains failure (AMF) testing is a reliable early warning.
2. S12R boost imbalance between cylinder banks — the V12 configuration means each bank has its own turbocharger. As one unit wears faster than the other, the engine develops an uneven exhaust note and vibration at operating RPM. This is detectable by comparing exhaust temperature between banks — a significant differential indicates one turbo is underperforming.
3. 4D56 blue smoke on L200 / Pajero at startup — the most common early turbo symptom on the 4D56. Oil passing worn TD04 seals enters the intake and combustion chamber during the first seconds of engine start. Blue smoke that clears within 30–60 seconds of warm-up is a reliable indicator of TD04 compressor seal wear — distinct from valve seal failure which produces smoke throughout operation.
4. 4D34 power loss on loaded Canter delivery routes — worn TD05H turbos on the Fuso Canter 4D34 manifest as power loss under load on urban delivery routes. Drivers report difficulty maintaining speed on inclines at rated payload — a symptom that appears 50,000–100,000 km before complete turbo failure on well-maintained vehicles.
5. S6S-DT forklift whine under lift load — the TD04HL on heavy forklifts produces a distinctive high-pitched bearing whine during maximum lift cycles (peak boost demand). This sound — which may be mistaken for hydraulic pump noise — indicates TD04HL bearing wear requiring prompt attention to prevent catastrophic failure during a loaded lift operation.
6. GTB2056V fault codes on Fuso Canter F1C — the newer Canter uses a variable geometry GTB2056V that generates ECU fault codes when the VGT mechanism is fouled or the actuator fails. Codes P0299 (underboost) and P0234 (overboost) on the 3.0L F1C engine almost always relate to the GTB2056V before any mechanical failure occurs — clean the VGT vanes and test the actuator before condemning the turbo assembly.

Mitsubishi-Specific Failure Patterns

• S6R / S12R genset hot shutdown — large genset operators frequently shut down the engine immediately after load transfer without an idle-down period. At the thermal mass of the S6R and S12R, this causes severe oil coking in the turbocharger feed passages. Implementing a mandatory 5-minute cool-down idle before shutdown is the single most cost-effective preventive measure for large Mitsubishi genset turbochargers.
• 4D56 TD04 counterfeit units in Southeast Asian markets — the 4D56 aftermarket in Indonesia, Philippines, Thailand, and Vietnam is heavily infiltrated with counterfeit TD04 units. These externally resemble genuine Mitsubishi or Mitsubishi-type units but fail within 10,000–20,000 km. Always verify supplier documentation and request dynamic balance certificates for 4D56 TD04 replacements.
• 4D34 oil feed line coking on urban delivery fleets — Fuso Canter delivery trucks in urban distribution make multiple stops per hour with hot engine shutdown. Oil coking in the TD05H feed line is endemic in this application. Regular feed line inspection and replacement at 150,000 km significantly extends TD05H service life.
• S12R intercooler contamination from turbo failure — the V12 layout means a turbo failure on one bank can contaminate the intercooler core for that bank with oil. If the intercooler is not cleaned or replaced, the replacement turbocharger will fail prematurely as it draws oil-contaminated air back through the compressor wheel. Intercooler inspection and cleaning is mandatory after any S12R turbocharger failure.

Specification Checklist for Ordering

• Engine model suffix — S6R-PTA, S6R-MPTA, S12R-PTAA2, 4D56T, 4D34-3AT etc. — different suffixes indicate different power ratings and turbo specifications
• OEM part number from the turbo data plate — for 4D56 and 4D34: the 4917x-xxxxx format; for S6R/S12R: the 4918x-xxxxx format. Always verify directly from the data plate rather than from a parts book — multiple supersessions exist across all series
• Production year and market — 4D56 variants differ between Japanese domestic, Australian, Southeast Asian, and European market specifications
• For S12R: confirm turbo position (left bank or right bank) — the two turbos are mirror images of each other in some configurations; ordering without specifying position risks receiving the wrong rotation direction

Why HHX PARTS for Mitsubishi Turbochargers?

• Full Mitsubishi commercial range — TD04 (4D56 all variants), TD05H / TD05-12G (4D34), TD08 (6D22T3), TD04HL (S6S-DT), GTB2056V (4P10 Canter)
• S6R / S12R sourcing capability — we source and supply large genset turbochargers (49181-03872, 49182-03471) to order with lead times significantly shorter than OEM channels
• Counterfeit-free supply chain — particularly critical for 4D56 TD04, the most counterfeited Mitsubishi turbocharger in Southeast Asian markets
• Factory-direct pricing — significant savings versus Mitsubishi Fuso dealer parts pricing, particularly relevant for high-volume fleet and genset operators
• Global supply — serving Fuso truck operators, genset service companies, forklift workshops, and marine operators across Southeast Asia, the Pacific, Africa, and the Middle East

Further Reading

• The Complete Turbocharger Maintenance Manual
• The Complete Turbocharger Buyer’s Guide: 8 Costly Mistakes
• Isuzu 4HK1 & 6HK1 Turbocharger Guide
• Deutz BF4M & BF6M Turbocharger Guide
• Turbocharger Complete Guide 2025

Request a Quote for Your Mitsubishi Turbocharger

Send us your Mitsubishi OEM part number, engine model suffix, or equipment make and model — and we will confirm availability, pricing, and lead time within 24 hours. For S6R and S12R genset turbochargers, please include the engine serial number and genset rating (kVA).

• Email: gzlh2022@gmail.com
• Phone / WhatsApp: +86 18170714612
• Website: www.hhxparts.com