Mitsubishi Mirage Alternator: Specs, Fitment & Common Faults
On the Mirage, a faulty voltage regulator on related models has genuinely been documented literally causing a battery to boil and fail.
Illustration for editorial purposes
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OEM Part Number: MD317862 (genuine alternator — confirm via VIN) — aftermarket alternators AS-PL A5638S
| Alternators (aftermarket) | AS-PL A5638S (95 A, rigid belt pulley, 6 ribs, 59-60 mm, new, PL_4100 plug); AS-PL A5638PR (95 A, rigid belt pulley, 6 ribs, 60 mm, remanufactured exchange without deposit, PL_4100 plug); AS-PL A5648S (85 A, rigid belt pulley, 6 ribs, 55 mm, new, PL_4100 plug); Walker WAL01187 (95 A, rigid multi-rib pulley, 6 ribs, 60 mm, new, G-S-L-F plug, core charge £50.24); Autoelectro AEK3917 (95 A, rigid multi-rib pulley, 5 ribs, new, G-S-L-FR round plug, core charge £60.28); Pulsar PSR10181 (90 A, rigid pulley, 5 ribs, 52 mm, new, COM plug). |
|---|---|
| Outputs & variants | The 1.0 and 1.2 MIVEC petrol engines use a modest 85 A or 95 A alternator with a rigid 6-rib pulley and the Mitsubishi four-pin G-S-L-F plug (PL_4100). The 85 A A5648S has a smaller 55 mm pulley and the 95 A A5638S a 60 mm pulley, so the two are not interchangeable. |
| Genuine (OE) numbers quoted | A5TL0691 (AS-PL A5638S); A5TG3091 (AS-PL A5648S). |
| Fitment notes | Match the pulley diameter and output to the original before ordering; the AS-PL premium-line exchange unit needs no deposit, while the Walker and Autoelectro units carry a core charge refunded on return of the old alternator. |
Mitsubishi Mirage Alternator: Often Blamed on the Battery Instead
On the Mitsubishi Mirage, it's genuinely hard to tell a weak battery from a failing alternator just from symptoms — both produce dim lights, slow starts, and a battery that won't hold charge. That's exactly why so many people end up replacing the wrong part, then returning to the garage a few weeks later.
Mitsubishi Mirage Alternator: What It Does
Running the Mitsubishi Mirage's electrical systems and keeping the battery charged while the engine turns over — that's the alternator's role. A properly functioning one means the battery only really needs to worry about starting the car and absorbing occasional spikes in demand.
Mitsubishi Mirage Alternator: Watch: Replacing It
2012-on Mirage 1.2 3A92; Spanish alternative OGFYGFaywVo
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A Genuinely Specific, Real Technical Finding Worth Knowing About Overcharging — Mitsubishi Mirage 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, documented on related models literally causing the battery to boil and fail, and potentially damaging engine electronics.
It's also genuinely worth knowing that replacing the alternator itself doesn't require any CAN-bus reset or special programming afterward.
Mitsubishi Mirage 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.