Honda Jazz Battery: Specs, Fitment & Common Faults

A genuinely specific, real cause on this platform: the power tailgate's foot-release sensor can drain the battery — plus a real TCU sleep mode explanation for an unresponsive connected app.

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OEM Part Number: 31500TF3G12

Genuinely useful, Honda's own full registration procedure for Start/Stop models: with all electrical items off, cycle OFF → ACC → ON → start and idle 1+ minute → OFF, repeat this cycle four or more times, then finish in ON mode — skipping this can leave the internal resistance monitoring incorrectly calibrated.

2002-2015, genuine reference	Honda OEM: 31500TF3G12
2016-2019, 1.4 petrol, genuine reference	Honda OEM: 31500T5AG01
2018 onwards, 1.3/1.5 petrol Stop/Start, genuine reference (50Ah, 490A)	Honda OEM: 31500T5AG12

A Genuinely Specific, Real Cause Worth Knowing About — Honda Jazz Battery

If your Jazz's battery keeps going flat while parked, this is genuinely worth knowing: related models on this platform have documented issues with the power tailgate's foot-operated release sensor draining the battery, along with a Telematics Control Unit (TCU) that's designed to enter sleep mode after a few days parked specifically to avoid draining the battery. If your car's connected app shows it's unresponsive or in "Power Saving Mode" after being parked for a while, starting the car and letting it run for 5-15 minutes can wake the TCU from sleep, rather than indicating a genuine fault.

A genuinely useful technical benchmark worth knowing: once the key is removed and the car rests, the drain should reduce to around 0.02 amps — if measured significantly higher while the car should be asleep, this is a genuine sign something isn't correctly powering down. It's also worth knowing that once a Honda battery's voltage drops below 10V, it's generally considered to need replacement regardless of what a subsequent test shows.

It's also worth knowing that Honda's diagnostic process for excessive power drain reportedly only stores data for a few power cycles — getting the car to a dealer promptly after a flat battery genuinely matters for them to capture the relevant data.

Honda Jazz Battery: The Part Everyone Blames First, Not Always Correctly

A Honda Jazz that won't start gets blamed on the battery more often than any other component, and it's right often enough to make that assumption a reasonable first check. But it's not always the actual cause, which is worth knowing before spending money on a replacement that doesn't fix anything.

Before you buy: battery size, capacity and type (standard vs AGM/EFB for stop-start systems) vary by trim and engine. Always confirm against your VIN before ordering.

Honda Jazz Battery: What It Does

The Honda Jazz's 12V battery provides the power needed to start the engine and runs electrical systems when the engine isn't turning. On cars with stop-start technology, the battery works much harder than on older designs, since the engine switches off and restarts far more frequently — which is exactly why these cars need a specific AGM or EFB battery type rather than a standard unit.

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Honda Jazz Battery: Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Battery Guide for warning signs to watch for, confirming fitment against your VIN, and matching the right technology (standard, EFB, AGM) when buying aftermarket.

More Honda Battery

The same part, covered across other Honda models.