Parts for your 2010 Honda Stream-Drive belt tensioner

2010 Honda Stream drive-belt tensioner — what it does and when to replace it

Per Honda technical sources, the 2010 Honda Stream (RN6–RN9) uses an automatic drive-belt tensioner. Honda service information for the R18A (1.8-litre) and R20A (2.0-litre) engines specifies an “auto-tensioner, drive belt” in the accessory drive system, and the Honda Electronic Parts Catalogue lists this component for the Stream with typical part numbers such as 31170-RNA-A01 (R18A) and 31170-R44-A01 (R20A), varying by VIN and market. That means the tensioner is absolutely relevant to servicing on this model.

On the Stream, the drive-belt tensioner keeps the serpentine belt snug across the alternator, A/C compressor and other pulleys. It’s spring-loaded, so it automatically maintains the right tension as the belt wears and loads change (like when the air-con kicks in). No manual adjustment is needed