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2015-2020 Ford F-150 serpentine belt size & part #

The exact serpentine belt your F-150 takes — the size, the OEM part number, the maker number — with the fitment cross-checked against two independent sources so you buy the right belt the first time.

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5L V8 · 2015-20205.0L Coyote

Main accessory belt

Belt size

6PK1390

6 ribs · 1390 mm (54.7 in)

Fitment confirmed from OEM part catalog + belt maker (Gates/Dayco) · verified Jun 2026. Rib count and length are the OE belt size.

OEM part #

BL3Z-8620-G

Maker #

6PK1390

We don't stock a reviewed belt for this engine yet. Search the confirmed part on Amazon — it's the safest way to land on the right belt.

Find 6PK1390 on Amazon
Where this came from
  • SixityAuto per-vehicle OE catalog — 2013-2017 Ford F-150 5.0L V8 main accessory belt, OE Ford BL3Z 8620-G / BL3Z 8620-A (factory part#→its own 5.0L V8 vehicle list) — “2013, 2014, 2015, 2016, 2017 Ford F-150 5.0L V8. Belt position: Alternator and Water Pump (Alt Pump). Routing: Crankshaft, Tensioner, Water Pump, Alternator. OE Cross Reference: 2013-2015 BL3Z 8620-A; 2016-2017 BL3Z 8620-G. [Belt size 6PK1390 confirmed via the matching Bando 6PK1390 application/cross-ref.]” — source
  • FindItParts — Bando 6PK1390 Accessory Drive Belt (Bando's own application + encoded 6-rib/1390 mm spec; OE x-ref Ford BL3Z 8620-C / BR3Z 8620-N, Gates K060547) — “BANDO 6PK1390 Accessory Drive Belt. Number of Ribs: 6. Effective Length: 1390.0 mm. Top Width: 0.84 in. OE Cross References — Ford: BL3Z 8620-C, BR3Z 8620-N; Gates: K060547; Continental: 4060547; Goodyear: 4060547. Fitment: Ford F-150 (2011-2020, 2023).” — source

A/C belt

Belt size

4PK1355

4 ribs · 1355 mm (53.3 in) · with A/C

Separate A/C (stretch-fit) belt — the 5.0L V8 runs TWO belts. Only present on A/C-equipped trucks.

Fitment confirmed from OEM part catalog + belt maker (Gates/Dayco) · verified Jun 2026. Rib count and length are the OE belt size.

OEM part #

BL3Z-8620-F

Maker #

4PK1355

We don't stock a reviewed belt for this engine yet. Search the confirmed part on Amazon — it's the safest way to land on the right belt.

Find 4PK1355 on Amazon
Where this came from
  • SixityAuto per-vehicle OE catalog — 2014-2018 Ford F-150 5.0L V8 A/C accessory belt, AC Tensioner, OE Ford BL3Z 8620-F (factory part#→its own 5.0L V8 vehicle list) — “2014, 2015, 2016, 2017, 2018 Ford F-150 5.0L V8. Belt position: AC Tensioner (Air Conditioning and Tensioner). 4 Rib Design. OE Ford BL3Z 8620-F. [Belt size 4PK1355 confirmed via the matching Bando 4PK1355 A/C application.]” — source
  • PartsHawk — Bando 4PK1355 Accessory Drive Belt (Bando's own A/C application + encoded 4-rib/1355 mm spec; OE x-ref Ford BL3Z 8620-F, Gates K040533) — “Bando 4PK1355 Serpentine Belt. Rib Quantity: 4. Effective Length: 1355.0 mm. Belt Position: Air Conditioning. Vehicle Fitment: 2014-2017 Ford F-150. OE Cross Reference: Ford BL3Z 8620-F; Gates K040533.” — source

Fitment confirmed against two independent sources — never changed by what an affiliate link pays us. The rib count and length are the OE belt size, which every brand re-cuts the same way, so any brand at that size is the same physical belt. Your owner's manual and the under-hood routing label are always the final word.