Hyundai i10 Alternator: Specs, Fitment & Common Faults
On the i10, resting and running voltage figures genuinely reveal whether the alternator is charging correctly.
Illustration for editorial purposes
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OEM Part Number: 37300-03600 (as quoted in catalogue listings — confirm via VIN) — aftermarket alternators Valeo 443239 / Lucas LRA03936
| Alternators (aftermarket) | Valeo 443239 (90 A, V-ribbed pulley, 5 ribs, 58 mm, new, three-point mounting); Valeo 443247 (90 A, freewheel clutch pulley, 6 ribs, 58 mm, new, three-point mounting); Lucas LRA03936 (90 A, rigid multi-rib pulley, 5 ribs, 58 mm, reman, plug 0250, core charge GBP 25.12); Lucas LRA03671 (70 A, freewheel clutch pulley, 5 ribs, 58 mm, reman, plug 0250, core charge GBP 25.12); AS-PL A3515S (90 A, rigid belt pulley, 5 ribs, 57.5 mm, new, PL_3307 plug); AS-PL A3530S (90 A, freewheel clutch pulley, 5 ribs, 57.5 mm, new, PL_3307 plug); AS-PL A3568S (90 A, freewheel clutch pulley, 6 ribs, 58 mm, new, PL_3307 plug); Ridex 4G1009 (70 A, rigid multi-rib pulley, 5 ribs, 58 mm, new, integrated regulator, excludes vacuum pump). |
|---|---|
| Outputs & variants | Three outputs appear, 70 A, 90 A and 130 A, all on a 58 mm pulley. The 1.0 and 1.2 Kappa petrols take the 90 A unit in several forms, five-rib rigid, five-rib freewheel or six-rib freewheel, with the 70 A version on base 1.0 cars; the 130 A seven-rib freewheel unit covers the 1.1 and 1.2 CRDi diesels. |
| Genuine (OE) numbers quoted | AS-PL A3530S quotes 37300-03600; AS-PL A3515S quotes 37300-03350; AS-PL A3534S quotes 37300-03500; AS-PL A3568S quotes 37300-04635. |
| Fitment notes | Four different 90 A versions exist for this car, differing by rib count and pulley type, so count the ribs and check for a freewheel clutch on the old unit before ordering; Lucas, Elstock and Walker exchange units carry refundable core charges of GBP 25 to GBP 50; Ridex 4G1009 excludes engines with an alternator-driven vacuum pump. |
A Genuinely Useful Diagnostic Benchmark Worth Knowing — Hyundai i10 Alternator
If you're trying to determine whether the alternator is genuinely at fault, this is worth knowing: with the engine off, battery voltage should read between roughly 12.4 and 12.7 volts. Once started, this should rise to between roughly 13.7 and 14.7 volts if charging correctly. If a warning light appears while driving, turning off every accessory you safely can and seeing if the warning clears tells you whether there's still enough charging capacity to get you somewhere safely.
It's also worth knowing that on some models, the fuse protecting the alternator circuit isn't a conventional, easily replaceable fuse at all, but a shunt in a different physical location.
Hyundai i10 Alternator: Often Blamed on the Battery Instead
Because a weak Hyundai i10 battery and a dying alternator both cause dim lights, slow starts and charge that won't hold, it's an easy mistake to replace the wrong one first. That mix-up sends plenty of people back to the garage a few weeks later, the real fault still there.
Hyundai i10 Alternator: Watch: Replacing It
Generation not stated in title; check it is the 2014-2019 car before linking.
Hyundai i10 Alternator: What It Does
Every time the Hyundai i10's engine runs, the alternator is generating the electricity that charges the battery and directly feeds the electrical systems. A properly working alternator leaves the battery mostly responsible for engine starts and short demand spikes — not for running the electronics unaided.
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Hyundai i10 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 Hyundai Alternator
The same part, covered across other Hyundai models.