I'm not quite sure how to add oil to the front hub unit on the 2000 H3.

Very simple on the 97 XL. Just remove rubber cap and add.

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'97 XL

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'00 H3

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With cap removed.

As you can see there's a small rubber plug in the center of the hub. Do you just insert the nozzle from the bottlek, pushing the plug aside to fill?

Thanks

MIke