The service and repair manual for the 2003 Mitsubishi Diamante — the 3.5L V6 engine, 3 trims. Matched to this exact model year, so the specifications and sequences are the ones Mitsubishi published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 2003 |
|---|---|
| Engines | 3.5L V6 — 213 cu in, SOHC |
| Trims | ES Sedan 4-Door · VR-X Sedan 4-Door · LS Sedan 4-Door |
| Federal record | 2 recalls · 75 complaints · 23 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 2003 Diamante manual
03 / ContentsSections in the manual
- Quick Lookups 170
- General Information 2,479
- Accessories & Equipment 519
- Heating, Ventilation & A/C (HVAC) 95
- Body & Frame 193
- Maintenance 22
- Brakes 257
- Restraints 46
- Drivelines & Axles 54
- Steering 124
- Electrical 316
- Suspension 117
- Engine Mechanical 271
- Transmission 178
- Engine Performance 1,198
- Idle Up RPM 900
- DEF Position 180
- FACE Position 4,820
- Use SUN PAG 56
04 / Known issuesRecalls on federal record for the 2003 Diamante
- Equipment — other › owners/service/other manual · 04V067000If the tether strap is improperly installed to the tether anchor, the child safety seat may not be s.
- Equipment — other › labels · 04V428000This does not meet the requirements of the standard.
Owners have filed 75 complaints and Mitsubishi has issued 23 technical service bulletins for the 2003 Diamante. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 2003 Diamante manual
Is this manual specific to the 2003 Diamante?
Yes. It is the OEM manual matched to the 2003 model year, covering the 3.5L V6 across the ES Sedan 4-Door, VR-X Sedan 4-Door, LS Sedan 4-Door trims. Specifications and procedure sequences are the ones Mitsubishi published for this year.
What 2003 Diamante problems does it help with?
2 recalls are on federal record for the 2003 Diamante, covering equipment. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by Mitsubishi dealers.
Does it include 2003 Diamante wiring diagrams?
Yes — the complete wiring diagrams for the 2003 build, alongside repair procedures, specifications and diagnostics.
Is it a subscription?
No. $29.99 once and the manual is yours. It is a digital manual — nothing ships; access details arrive by email after checkout and it works on any device.
RelatedOther Diamante years and 2003 Mitsubishi models
2004 Diamante · 2002 Diamante · 2001 Diamante · 2000 Diamante · 1999 Diamante · 1998 Diamante · 1997 Diamante · all 13 years
2003 Mitsubishi Eclipse · 2003 Mitsubishi Galant · 2003 Mitsubishi Lancer · 2003 Mitsubishi Mirage · 2003 Mitsubishi Montero · 2003 Mitsubishi Montero Sport · 2003 Mitsubishi Outlander · 2003 Mitsubishi Space Star · every 2003 model