Kia Sorento Alternator: Specs, Fitment & Common Faults
On the Sorento, oil leaking from the valve cover gasket directly above the alternator can genuinely kill it.
Illustration for editorial purposes
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OEM Part Number: 37300-2G750 (as quoted in catalogue listings — confirm via VIN) — aftermarket alternators Bosch 1 986 A01 826 / Valeo 443244
| Alternators (aftermarket) | Bosch 1 986 A01 826 (150 A, freewheel pulley, 6 ribs, 55 mm, new, 174 plug, excludes vacuum pump); Bosch 0 986 086 830 (150 A, freewheel pulley, 6 ribs, 55 mm, remanufactured exchange, core charge £25.80, 174 plug, excludes vacuum pump); Valeo 443244 (130 A, freewheel pulley, 6 ribs, 55 mm, new, four-point mounting); AS-PL A3435(VALEO) (130 A, freewheel pulley, 6 ribs, 55 mm, new, PL_3307); AS-PL A9304S (130 A, freewheel pulley, 6 ribs, 55 mm, new, PL_3307); AS-PL A9279S (150 A, freewheel pulley, 6 ribs, 55 mm, new, PL_3323); AS-PL A6485S (150 A, belt pulley, 6 ribs, 55 mm, new, PL_3307); Rotovis 9091469 (150 A, V-ribbed pulley, 6 ribs, 55 mm, remanufactured, C/L/FR plug). |
|---|---|
| Outputs & variants | 130 A and 150 A, both on a 6-rib 55 mm freewheel pulley. The 150 A unit is the usual fitment for the 2.2 CRDi diesel, which is the UK engine, while 130 A covers the 2.4 petrol and some 2.0 CRDi variants. |
| Genuine (OE) numbers quoted | AS-PL A9304S quotes 37300-2G750; AS-PL A9279S quotes 37300-2F000; AS-PL A6485S quotes 104211-8790; AS-PL A1055S (150 A, 55 mm) quotes 8400291; AS-PL A9192 (120 A, 5 ribs, 64 mm) quotes 37300-39450. |
| Fitment notes | UK 2.2 CRDi cars take the 150 A unit, and Bosch supplies both a new and an exchange version; the exchange unit has a £25.80 core charge and is supplied without a vacuum pump, so the pump from the old alternator must be transferred where fitted. |
A Genuinely Specific, Real Root Cause Worth Knowing — Kia Sorento Alternator
If your alternator keeps failing repeatedly, this is genuinely worth knowing: a documented cause on related engines is oil leaking down into the alternator from the valve cover gasket positioned directly above it. It's genuinely worth checking the valve cover gasket for signs of a leak before fitting a replacement alternator.
It's also worth knowing a genuinely useful diagnostic technique: placing one end of a wooden stick against the alternator housing and the other end near your ear acts as a simple, improvised stethoscope for isolating alternator noise.
Kia Sorento Alternator: Often Blamed on the Battery Instead
On the Kia Sorento, a failing alternator and a simply weak battery share almost the same symptom set at first: dim lights, sluggish starts, charge that won't hold. Mixing the two up is common, which is why plenty of people replace the battery only to find themselves back at the garage shortly after.
Kia Sorento Alternator: Watch: Replacing It
2019 UM Sorento V6; n6q7aRsSDP4 covers 2010-2020.
Kia Sorento Alternator: What It Does
The Kia Sorento's electrical systems and battery charging both depend on the alternator generating electricity whenever the engine runs. If it's healthy, the battery's job shrinks down to starting the engine and handling brief surges in demand, not powering everything else on its own.
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Kia Sorento 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 Kia Alternator
The same part, covered across other Kia models.