Mitsubishi Serial & Model Number Guide
Every Mitsubishi engine carries a model/serial label. Here is where to find it, what each part of the number means, and how to use it for parts, service and age.
What the number means
Worked example — S16R-PTA:
| Part | Meaning | Detail |
|---|---|---|
S | Plant code | Sagamihara Machinery Works — Mitsubishi Heavy Industries' diesel-engine plant — per the service manual's own model-code diagram. |
16 | Number-of-cylinders code | Cylinder-count position in the model string. |
R | Series code | Series-identifying letter (the manual's diagram confirms this position exists and labels it "Series code" without further per-letter definition). |
P | Application code | No code = construction-equipment drive; P = generator drive and prime power; L = locomotive drive; MP = marine generator drive and marine general mechanical drive; M = marine propulsion. |
TA | Turbo code | T = turbocharged; TA = turbocharged, aftercooled; TK = turbocharged, intercooled. |
Using the serial number
Real-world nameplates sometimes carry further suffix letters not defined in this source (e.g. the "2" and "W" in S16R2-PTAW, or "Y2" in S12R-Y2PTAW) — treat those as an undecoded generation/variant marker rather than guessing at their meaning. No public serial-to-build-date formula was found.
Common Mitsubishi maintenance parts
The service parts Mitsubishi's own documents list across more than one engine model. Confirm the number for your unit on its model page or data plate before ordering.
| Part | Part number | Fits | Price |
|---|---|---|---|
| Oil filter | 30A4000103 | 3 Mitsubishi engines | eBay $17.00 |
| Oil filter | 330560546 | 2 Mitsubishi engines | eBay $28.08 |
| Fuel filter | 330560552 | 4 Mitsubishi engines | PartsGeek $11.97 eBay $17.99 NAPA $36.94 |
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Decode rules verified against: Mitsubishi Heavy Industries diesel engine service manual (S16R), Section 1.3 "Engine model and application codes" — our own harvested corpus copy. Figures are for reference; confirm against the official documentation for your exact unit.