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Help! Can’t find belt tensioner on Micra K14 1.0 HR10DE


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Hi all,

I’m trying to replace the alternator on my 2017 Nissan Micra K14 Visia 1.0L (71PS – HR10DE engine), but I’ve hit a wall trying to get the belt off.

I’ve located the tensioner pulley (the black one just above the alternator), but the centre is smooth — no bolt head or nut — and I can’t for the life of me find where to apply a tool to release the belt tension. I am no mechanic either .... wheels and fluids is usually my limit!

I’ve checked above, behind, and around the tensioner pulley but can’t see a square hole or hex boss to rotate the tensioner arm. The engine bay is tight, and I’m not sure if I’m missing something obvious or if access is just that hidden.

I’ve tried to follow online guides and videos, but most are for different engines or older models (K12/K13).

Photos attached if that helps (can add more if needed).

Any help — diagrams, tips, tooling advice — would be massively appreciated before I lose the will to live or call a mechanic 😅

Thanks in advance!

Screenshot 2025-06-28 at 15.25.57.png

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