G3 Wire Harness

I'm not always this enthusiastic about a product Azusa promotes, but I totally agree this one fills a genuine need, because Toyota would sell you one of these for gen 1 or gen 2, but they stopped selling it for gen 3 and just said "if you need it, buy a whole battery".

The nickel-plated bus bars and wide SS flange nuts all seem well chosen. Nice package.

There are a few bits on the sell page that do seem pretty superfluous:

• To be as efficient or more efficient than OEM in transmitting a signal between the battery modules and the ECU.
• Voltage sensor tabs are made of a better conductive copper alloy compared to the OEM
• Wires' operational temperature rating is greater and internal resistance is lower, compared to the OEM.

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... these wires connect blocks in the battery to voltmeter circuits in the smart unit. Voltmeters by nature are high impedance. Milliohms added or subtracted in these wires won't rise to the level of rounding error.

I am glad the listing mentions the color code doesn't match factory. Even better if some label on the harness itself says that, just so no tech ends up looking at it and getting confused.

Some information I would like to see and don't see would be the actual type of wire insulation used. Although this harness looks innocent enough, it is a high-voltage part, with wires that can be more than 240 volts different crowded together in a tight space (especially where they are bundled through the orange tubing). And the wires are very thin, which I suspect Toyota gets away with by using a very thin insulation that nevertheless has the requisite high-voltage performance. Similar thin wires commonly available for purchase might not have a suitable rating on this score—which is arguably more relevant than, say, higher copper conductivity.