Mazda 6 Alternator: Specs, Fitment & Common Faults
On the Mazda 6, a "Charging System Malfunction" message is often genuinely a software glitch, not a true hardware failure.
Illustration for editorial purposes
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OEM Part Number: PE01-18-300 (genuine alternator — confirm via VIN) — aftermarket alternators Bosch 1 986 A00 631 / Hella 8EL 011 713-811
| Alternators (aftermarket) | Hella 8EL 011 713-811 (150 A, freewheel pulley, 6 ribs, 51 mm, new); Bosch 1 986 A00 631 (100 A, rigid multi-rib pulley, 6 ribs, 51 mm, new, plug 139, excludes vacuum pump); AS-PL A5145 (150 A, freewheel pulley, 6 ribs, 51 mm, new, plug PL_3310); AS-PL A5337 (100 A, 6 ribs, 51 mm, new, plug PL_3310); Walker WAL00674 (150 A, freewheel pulley, 6 ribs, 51 mm, remanufactured, plug 0314, IG-C-K connector, core charge £50.24); Ridex 4G1370 (150 A, freewheel pulley, 6 ribs, 51 mm, new, excludes vacuum pump); BV PSH 145.563.150.130 (150 A, freewheel pulley, 6 ribs, 51 mm, new). |
|---|---|
| Outputs & variants | Confirm the amperage and pulley type against the old unit |
| Genuine (OE) numbers quoted | A2TX3081 (AS-PL A5145); A5TL0491 (AS-PL A5337); A5TJA091 (AS-PL A5616S). |
| Fitment notes | Both outputs share the same pulley size, so the plug and the A2TX or A5TL Mitsubishi number on the old unit decide the fit; most 150 A remanufactured units (Walker, Stardax, HC-Cargo) carry a core charge, and several BV PSH units are remanufactured despite being listed as new. |
A Genuinely Important Warning Worth Knowing Before Replacing the Alternator — Mazda 6 Alternator
If you're seeing a "Charging System Malfunction" or "Low Battery Risk" warning message, particularly on a relatively new car, this is genuinely worth knowing: this specific warning has been widely reported as often being a software sensitivity issue related to the Body Control Module, rather than a genuine hardware failure. It's worth asking a dealer directly whether a relevant software fix exists before assuming the alternator needs replacing.
It's also worth knowing that alternator fitment is genuinely more complex than it might first appear — the correct part depends on engine size, the specific transmission fitted, and whether the engine has cylinder deactivation.
Mazda 6 Alternator: Often Blamed on the Battery Instead
Early on, a weak Mazda 6 battery and a dying alternator look almost identical — dim lights, sluggish starts, a car that won't hold its charge — which is exactly why so many people fit a new battery and end up back at the garage weeks later, the actual fault still unaddressed.
Mazda 6 Alternator: Watch: Replacing It
GJ 2.5 Skyactiv, explicitly 2013-2020.
Mazda 6 Alternator: What It Does
On the Mazda 6, while the engine runs, the alternator generates the electricity that charges the battery and powers the car's electrical systems directly. With a healthy alternator, the battery's real job becomes starting the engine and covering brief demand spikes, rather than running the electronics on its own.
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Mazda 6 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 Mazda Alternator
The same part, covered across other Mazda models.