|This article is about Engine Efficiency Module in Subnautica. For the related article on the Below Zero Wiki, see Engine Efficiency Module.|
|This article is about Engine Efficiency Module. If this is not what you are looking for, see Upgrade Module (Disambiguation).|
The Engine Efficiency Module recycles heat by-product to minimize power inefficiencies. Each Module reduces power use by 15% (Can be stacked up to four modules resulting in a maximum power efficiency of 60%).
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