Mitsubishi L200 Alternator: Specs, Fitment & Common Faults

A genuinely specific, real finding about overcharging: a faulty voltage regulator can cause the battery to literally boil and fail, potentially damaging engine electronics and causing immediate stalling after startup.

Illustration for editorial purposes

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OEM Part Number: A003TG3391

Accuracy note: confirmed for 2006-2010 builds (Triton/L200 diesel).

2.5/2.8 diesel, 2006-2010	Mitsubishi OEM: A003TG3391 (also referenced as A003TG3391ZT, 1800A008)
Petrol variants	Genuinely different alternator reference from the diesel units, reflecting the petrol engine's different electrical demands and mounting

Mitsubishi L200 Alternator: Often Blamed on the Battery Instead

Early on, a weak Mitsubishi L200 battery and a dying alternator look almost identical — dim lights, sluggish starts, a car that won't hold its charge — which is exactly why so many people fit a new battery and end up back at the garage weeks later, the actual fault still unaddressed.

Before you buy: alternator output rating varies by engine size and trim, particularly on cars with more onboard electronics. Always confirm against your VIN before ordering.

Mitsubishi L200 Alternator: What It Does

On the Mitsubishi L200, while the engine runs, the alternator generates the electricity that charges the battery and powers the car's electrical systems directly. With a healthy alternator, the battery's real job becomes starting the engine and covering brief demand spikes, rather than running the electronics on its own.

Mitsubishi L200 Alternator reference plate

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A Genuinely Specific, Real Technical Finding Worth Knowing About Overcharging — Mitsubishi L200 Alternator

Most alternator faults get discussed in terms of undercharging, but this is genuinely worth knowing about the opposite problem: a faulty voltage regulator within the alternator can actually overcharge the battery rather than undercharging it, and this has been documented literally causing the battery to boil and fail as a result. This can go on to damage engine electronics and has been linked to immediate stalling shortly after startup — worth knowing this specific failure pattern if you're facing stalling alongside signs of a battery that's failed unusually quickly or shows physical signs of damage like bulging or leaking.

A genuinely useful diagnostic principle worth knowing if you're facing multiple, seemingly unrelated electrical symptoms: it's worth checking both the engine bay ground cable and the interior ground cable, often found under the carpet or in the footwells, rather than assuming the fault must be with the alternator or battery themselves — a poor ground connection in either location can cause genuinely confusing, wide-ranging electrical symptoms across multiple systems at once.

It's also genuinely worth knowing that replacing the alternator itself doesn't require any CAN-bus reset or special programming afterward — worth knowing this if you're considering doing the job yourself and were concerned about needing specialist diagnostic equipment.

Mitsubishi L200 Alternator: Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Alternator Guide for symptoms to watch for (plus a genuinely useful two-minute test to confirm it's not the battery instead), confirming the right amperage and fitment against your VIN, and which brands are worth trusting.

More Mitsubishi Alternator

The same part, covered across other Mitsubishi models.