Suzuki Ignis Alternator: Specs, Fitment & Common Faults
On the Ignis, switching on the headlights and rear window heater right after starting genuinely helps distinguish an alternator squeal from simple belt slip.
Illustration for editorial purposes
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OEM Part Number: 31400-81P0 (genuine alternator — confirm via VIN) — aftermarket alternators Bosch 0 986 048 771 / Lucas LRA02804
| Alternators (aftermarket) | Bosch 0 986 048 771 (90 A, freewheel clutch pulley, 6 ribs, 54 mm, remanufactured exchange, B+ M8 / D+ M5 terminals, £100.47 core charge); Lucas LRA02804 (90 A, freewheel, 6 ribs, 54 mm, remanufactured, plug 0230, £20.09 core charge); AS-PL A4074 (90 A, freewheel, 6 ribs, 54 mm, new Standard Line, plug PL_9104, OE 1012101120); AS-PL A6046 (75 A, rigid pulley, 4 ribs, 55 mm, new Standard Line, plug PL_3301, OE 1022112600); AS-PL A6109 (70 A, rigid pulley, 4 ribs, 55 mm, new Standard Line, plug PL_9104, OE 1022118560); Rotovis 9091950 (90 A, V-ribbed pulley, 5 ribs, 57 mm, remanufactured, COM plug); Rotovis 9090462 (75 A, V-ribbed pulley, 4 ribs, 54 mm, remanufactured, plug C/IG/L); Autoelectro AEK4383 (90 A, rigid multi-rib pulley, 5 ribs, new, round plug B+/LIN2, £60.28 core charge) |
|---|---|
| Outputs & variants | 70-75 A on a 4-rib 55 mm rigid pulley with a C/IG/L plug (Denso 1022112600 / 1022118560 pattern) for the plain 1.2 Dualjet; 90 A 5-rib 57 mm with a COM or LIN2 plug for the 1.2 SHVS mild hybrid; the 90-120 A 6-rib freewheel units (Bosch 0 986 048 771, Lucas LRA02804) are a Suzuki pattern from larger engines |
| Genuine (OE) numbers quoted | 1012101120 (AS-PL A4074); 1022118560 (AS-PL A6109); 1022112600 (AS-PL A6046) |
| Fitment notes | Mild-hybrid SHVS cars need the LIN-controlled 90 A unit and will throw a charging fault with a conventional one, so check whether the car has the SHVS badge before ordering |
Suzuki Ignis Alternator: Often Blamed on the Battery Instead
On the Suzuki Ignis, 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.
Suzuki Ignis Alternator: What It Does
Running the Suzuki Ignis'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.
Suzuki Ignis Alternator: Watch: Replacing It
No Ignis alternator fitting video; Swift gen not stated, Ignis K12C shares Swift engine
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A Genuinely Useful, Real Diagnostic Test Worth Trying — Suzuki Ignis Alternator
If you're chasing a squeal from the alternator area, this is genuinely worth trying: starting the engine and immediately switching on the headlights and rear window heater together can help distinguish the cause — if the squeal continues or worsens under this extra electrical load, it points toward the alternator working harder to keep up, whereas a squeal unaffected by this test is more likely to be simple belt slip.
It's also genuinely worth knowing that a persistent squeal can sometimes survive a straightforward belt replacement, documented on related models, worth bearing in mind rather than assuming one repair will definitely resolve it if the noise returns or worsens afterward.
Suzuki Ignis 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 Suzuki Alternator
The same part, covered across other Suzuki models.