Volvo XC40 Alternator: Specs, Fitment & Common Faults
On the XC40, a specific alternator pulley on related models can genuinely fail on its own, sometimes mistaken for a full alternator failure.
Illustration for editorial purposes
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OEM Part Number: 36010604 (genuine alternator — confirm via VIN) — aftermarket alternators Hella 8EL 011 713-771 / AS-PL A01120S
| Alternators (aftermarket) | AS-PL A01120S (150 A, freewheel pulley, 6 ribs, 61.5 mm, new, plug PL_2305); AS-PL A3823S (150 A, freewheel pulley, 6 ribs, 61.5 mm, new, plug PL_2305); AS-PL A01019S (150 A, rigid belt pulley, 6 ribs, 61 mm, new, plug PL_2305); AS-PL A0690(SEG) (215 A, freewheel pulley, 6 ribs, 61.5 mm, new, plug PL_2305, premium line); AS-PL A0774S (215 A, rigid belt pulley, 6 ribs, 62 mm, new, plug PL_2305); AS-PL A01199(SEG) (210 A, 48 V, rigid belt pulley, 7 ribs, 62 mm, new, plug PL_5201, mild-hybrid); Hella 8EL 011 713-771 (freewheel pulley, 6 ribs, 62 mm, new, 14 V charging, fitting by qualified personnel); Rotovis 9092076 (215 A, freewheel pulley, 6 ribs, 62 mm, remanufactured, plug COM). |
|---|---|
| Outputs & variants | Three distinct families are listed. The 150 A six-rib 61-61.5 mm units (AS-PL A01120S, A3823S, A01019S, BV PSH 325.504.150.280, Stardax STX102275R) suit the lower-powered petrol and diesel cars; the 215 A six-rib 61.5-62 mm units (AS-PL A0690/A0774, Walker WAL00798, Rotovis, HC-Cargo, BV PSH 815.541.215.xxx) suit the higher-output cars; and the 210 A seven-rib 48 V units (AS-PL A01199(SEG), BV PSH 817.501.210.280) are the belt-driven starter-generators for the B3/B4/B5 mild-hybrids. Both freewheel and rigid pulleys appear within the 150 A and 215 A groups. |
| Genuine (OE) numbers quoted | AS-PL A01199(SEG) for OE 0127813048; AS-PL A01120S for OE 0126312163; AS-PL A01019(SEG) and A01019S for OE 0125711041; AS-PL A0774S for OE 0125812009; AS-PL A0774(SEG) for OE 0125812012; AS-PL A0690(SEG) for OE 0125812075; AS-PL A3823S for OE FGN12S174. |
| Fitment notes | No Bosch, Valeo, Denso or Lucas unit is listed. The 48 V units are only for the mild-hybrid B-badged cars and must not be fitted to a 12 V car, and the Recharge electric models have no alternator. Match the 150 A or 215 A rating and pulley type on the old unit. Walker and Stardax units carry core charges of £21.94 to £50.24 and the Autoelectro AEG1669 £125.59, refunded on return of the old alternator. |
Volvo XC40 Alternator: Often Blamed on the Battery Instead
On the Volvo XC40, a weak battery and a failing alternator produce almost identical symptoms at first — dim lights, slow starts, a car that won't hold charge — which is exactly why so many people replace the battery, only to be back at the garage a few weeks later with the real culprit untouched.
Volvo XC40 Alternator: What It Does
The Volvo XC40's alternator generates electricity while the engine runs, charging the battery and powering the car's electrical systems directly. A healthy alternator means the battery is mostly there for starting the engine and covering brief demand spikes — not for actually running the car's electronics on its own.
Volvo XC40 Alternator: Watch: Replacing It
Weak match: nothing on XC40 in 3 searches
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A Genuinely Useful Piece of Context Worth Knowing About Alternator Pulleys — Volvo XC40 Alternator
If you're chasing an alternator noise on related Volvo models, this is genuinely worth knowing: some alternators use a one-way clutch or decoupler pulley rather than a solid pulley, and this specific component can fail and cause noise on its own, sometimes without the alternator itself being at fault.
It's also worth knowing that when replacing an alternator, it's worth double-checking the exact part number against your VIN, since not every alternator that physically fits is necessarily the correct electronic specification for your car.
Volvo XC40 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 Volvo Alternator
The same part, covered across other Volvo models.