Honda Jazz Alternator: Specs, Fitment & Common Faults
On the Jazz, a real money-saving story: a new alternator and belt didn't fix a whine — a known tensioner pulley was the actual cause.
Illustration for editorial purposes
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OEM Part Number: 31100-PWA-004
| Europe Jazz (2002-2010) | Honda OEM: 31100-PWA-004 (also referenced as 31100PWKQ01) |
|---|---|
| Jazz Hybrid (e:HEV, where fitted) | Genuinely no conventional belt-driven alternator at all — Honda's e:HEV hybrid system handles 12V charging through the hybrid powertrain's power control unit instead |
A Genuinely Valuable, Real Money-Saving Story Worth Knowing — Honda Jazz Alternator
If you've already replaced the alternator and the drive belt but a whine persists, this is genuinely worth knowing before assuming the new alternator is faulty: one documented case on a related Honda model saw exactly this happen, with the actual cause eventually identified as the auxiliary belt tensioner pulley — a known failure point separate from the alternator itself. The pulley alone was sourced cheaply and fitted, resolving the whine completely.
It's also worth knowing that alternator whine is sometimes confused with a genuinely different noise from a poor electrical connection heard through the audio system — if the whine changes pitch only when the stereo is on, this points toward a grounding issue entirely separate from the alternator.
Honda Jazz Alternator: Often Blamed on the Battery Instead
On the Honda Jazz, 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.
Honda Jazz Alternator: What It Does
Running the Honda Jazz'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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Honda Jazz 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 Honda Alternator
The same part, covered across other Honda models.