OE Quality
60-Day Returns

Dayco 89701 Accessory Drive Belt Tensioner Assembly
Overview of Dayco Accessory Drive Belt Tensioner Assembly 89701
The Dayco 89701 accessory drive belt tensioner assembly is designed for precise serpentine belt tension control in select Subaru vehicles. Engineered for automatic operation with a counter clockwise direction, this tensioner ensures consistent performance and durability for your Subaru BRZ, Crosstrek, Forester, Impreza, Legacy, Outback, WRX, and XV Crosstrek models.
- Compatible with Subaru BRZ, Crosstrek, Forester, Impreza, Legacy, Outback, WRX, and XV Crosstrek
- Serpentine belt type tensioner assembly
- Automatic tensioner with counter clockwise rotation
- Single pulley design with 70mm diameter and 26.2mm width
- Pulley features a flat surface for optimal belt contact
Detailed Product Description
The Dayco 89701 accessory drive belt tensioner assembly is an automatic tensioner specifically designed to maintain proper tension on serpentine belts in various Subaru models. Featuring a single pulley with a 70mm diameter and 26.2mm width, this tensioner provides reliable belt alignment and tensioning. The pulley’s flat surface helps reduce belt slippage and wear, contributing to the longevity of the belt system. Its counter clockwise direction matches the original equipment specifications for the listed Subaru vehicles, ensuring seamless integration and operation.
Common Applications and Problem Resolution
- Maintains correct serpentine belt tension to prevent belt slipping
- Reduces noise caused by loose or worn tensioners
- Prevents premature belt wear and potential engine accessory failure
- Ensures smooth operation of alternator, power steering, and air conditioning components
- Addresses issues related to belt misalignment and tension loss
Installation Notes and Tips
When installing the Dayco 89701 tensioner assembly, ensure the serpentine belt is properly routed according to the vehicle’s service manual. The automatic tensioner requires no manual adjustment but verify the pulley rotates smoothly in the counter clockwise direction. Inspect the belt for wear or damage and replace if necessary to maintain optimal system performance.
Quality Assurance and Warranty
Dayco manufactures the 89701 tensioner assembly to meet or exceed OEM standards for fit, form, and function. While specific warranty details are not provided here, Dayco products typically come with a limited warranty against defects in materials and workmanship. Refer to Dayco’s official documentation for complete warranty information.
| Brand | Dayco |
| Part Number | 89701 |
| Belt Type | Serpentine |
| Direction | Counter clock wise |
| Number of Pulleys | 1 |
| Pulley 1 Diameter | 70 |
| Pulley 1 Flat | Y |
| Pulley 1 Width | 26.2 |
| Type | Automatic |
This part fits 56 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2025 | Subaru | BRZ | N/A | ||||
| 2024 | Subaru | BRZ | N/A | ||||
| 2023 | Subaru | BRZ | N/A | ||||
| 2022 | Subaru | BRZ | N/A | ||||
| 2021 | Subaru | WRX | N/A | ||||
| 2020 | Subaru | BRZ | N/A | ||||
| 2020 | Subaru | WRX | N/A | ||||
| 2019 | Subaru | BRZ | N/A | ||||
| 2019 | Subaru | Legacy | 2.5L | H4 | N/A | ||
| 2019 | Subaru | Outback | 2.5L | H4 | N/A | ||
| 2019 | Subaru | WRX | N/A | ||||
| 2018 | Subaru | BRZ | N/A | ||||
| 2018 | Subaru | Forester | 2.5L | H4 | N/A | ||
| 2018 | Subaru | Forester | 2.0L | H4 | N/A | ||
| 2018 | Subaru | Legacy | 2.5L | H4 | N/A | ||
| 2018 | Subaru | Outback | 2.5L | H4 | N/A | ||
| 2018 | Subaru | WRX | N/A | ||||
| 2017 | Subaru | BRZ | N/A | ||||
| 2017 | Subaru | Crosstrek | N/A | ||||
| 2017 | Subaru | Forester | 2.5L | H4 | N/A | ||
| 2017 | Subaru | Forester | 2.0L | H4 | N/A | ||
| 2017 | Subaru | Legacy | 2.5L | H4 | N/A | ||
| 2017 | Subaru | Outback | 2.5L | H4 | N/A | ||
| 2017 | Subaru | WRX | N/A | ||||
| 2016 | Subaru | BRZ | N/A | ||||
| 2016 | Subaru | Crosstrek | GAS | N/A | |||
| 2016 | Subaru | Forester | 2.5L | H4 | N/A | ||
| 2016 | Subaru | Forester | 2.0L | H4 | N/A | ||
| 2016 | Subaru | Impreza | 2.0L | H4 | N/A | ||
| 2016 | Subaru | Legacy | 2.5L | H4 | N/A | ||
| 2016 | Subaru | Outback | 2.5L | H4 | N/A | ||
| 2016 | Subaru | WRX | 2.0L | H4 | N/A | ||
| 2015 | Subaru | BRZ | N/A | ||||
| 2015 | Subaru | Forester | 2.5L | H4 | N/A | ||
| 2015 | Subaru | Forester | 2.0L | H4 | N/A | ||
| 2015 | Subaru | Impreza | 2.0L | H4 | N/A | ||
| 2015 | Subaru | Legacy | 2.5L | H4 | N/A | ||
| 2015 | Subaru | Outback | 2.5L | H4 | N/A | ||
| 2015 | Subaru | WRX | 2.0L | H4 | N/A | ||
| 2015 | Subaru | XV Crosstrek | GAS | N/A | |||
| 2014 | Subaru | BRZ | N/A | ||||
| 2014 | Subaru | Forester | 2.5L | H4 | N/A | ||
| 2014 | Subaru | Forester | 2.0L | H4 | N/A | ||
| 2014 | Subaru | Impreza | 2.0L | H4 | N/A | ||
| 2014 | Subaru | Legacy | 2.5L | H4 | N/A | ||
| 2014 | Subaru | Outback | 2.5L | H4 | N/A | ||
| 2014 | Subaru | XV Crosstrek | GAS | N/A | |||
| 2013 | Subaru | BRZ | N/A | ||||
| 2013 | Subaru | Forester | 2.5L | H4 | N/A | ||
| 2013 | Subaru | Impreza | 2.0L | H4 | N/A | ||
| 2013 | Subaru | Legacy | 2.5L | H4 | N/A | ||
| 2013 | Subaru | Outback | 2.5L | H4 | N/A | ||
| 2013 | Subaru | XV Crosstrek | N/A | ||||
| 2012 | Subaru | Forester | 2.5L | H4 | N/A | ||
| 2012 | Subaru | Impreza | 2.0L | H4 | N/A | ||
| 2011 | Subaru | Forester | 2.5L | H4 | N/A |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.