Toyota C-HR Alternator: Specs, Fitment & Common Faults
On the C-HR Hybrid, there's no conventional alternator at all — it's an integrated motor-generator, with its own separate 12V charging path.
Illustration for editorial purposes
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OEM Part Number: 27060-37250 (genuine alternator — confirm via VIN) — aftermarket alternators Valeo 439864 / Denso DAN938
| Alternators (aftermarket) | Denso DAN938 (100 A, freewheel clutch pulley, 7 ribs, 58 mm, new OE quality, supersedes to DAN1317); Denso DAN1347 (80 A, freewheel, 7 ribs, 58 mm, new OE quality); AS-PL A6741S (125 A, freewheel, 6 ribs, 52 mm, new Standard Line, plug PL_2306, OE 104211-4410); AS-PL A6806S (100 A, freewheel, 6 ribs, 52 mm, new Standard Line, plug PL_2306, OE 104211-4330); Autoelectro AEK4394 (115 A, freewheel, 6 ribs, new, round plug B+/LIN2, £125.59 core charge); BV PSH 195.556.130.050 (130 A, freewheel, 5 ribs, 58 mm, new +Line Original); Ridex 4G0119 (130 A, freewheel, 7 ribs, 58 mm, new, plug L-IG-RLO-DFM); Valeo 439864 (210 A, rigid V-ribbed pulley, 6 ribs, 53 mm, new, start-stop vehicles only) |
|---|---|
| Outputs & variants | 100-125 A on a 6-rib 52 mm freewheel pulley with a LIN plug (Denso 104211-4330 / 104211-4410) for the 1.2 Turbo 8NR-FTS petrol, the 125 A version for cars with start-stop and higher load; the 1.8 and 2.0 Hybrid have no belt-driven alternator and use the inverter's DC-DC converter; the 80-130 A 7-rib 58 mm units and the 210 A Valeo are older or non-Toyota patterns |
| Genuine (OE) numbers quoted | 104211-4410 (AS-PL A6741S); 104211-4330 (AS-PL A6806S); DAN1317 (Denso DAN938 replacement) |
| Fitment notes | Only the 1.2 Turbo petrol has an alternator to replace, and it takes the small-pulley 52 mm Denso with a LIN control plug, so a conventional 7-rib unit will not fit; the Autoelectro exchange unit carries a £125.59 core charge and the AS-PL PR-suffix units are exchange parts without deposit. |
A Genuinely Important Distinction Worth Understanding on Hybrid Models — Toyota C-HR Alternator
It's genuinely worth understanding that hybrid variants don't use a conventional, belt-driven alternator in the way a standard petrol or diesel car does — instead, the hybrid transaxle houses a motor-generator unit that performs a broadly similar charging function as part of the wider hybrid system. If you're chasing information or a repair quote for "the alternator" on a hybrid, it's genuinely worth being clear with a specialist that you mean this integrated component, since the repair path and cost are considerably different from a conventional car.
If you're hearing an unusual whine specifically from the hybrid transaxle area, it's genuinely worth having this diagnosed by a specialist familiar with Toyota's hybrid system specifically, given how different this component is from a conventional alternator.
Toyota C-HR Alternator: Often Blamed on the Battery Instead
On the Toyota C-HR, 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.
Toyota C-HR Alternator: Watch: Replacing It
Weak match: no C-HR video at all; C-HR hybrid has no alternator, only the 1.2T does
Toyota C-HR Alternator: What It Does
Running the Toyota C-HR'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.
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Toyota C-HR 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 Toyota Alternator
The same part, covered across other Toyota models.