Description
DAYCO;5040370
Type: Serpentine / Poly‑rib belt
Ribs: 4
Effective length: ~37.0 in (940 mm)
Outside circumference: ~37.67 in
Top width: ~0.54 in
Material: EPDM rubber with aramid reinforcement
Industry size: 4PK0940 / 4K370
In plain terms: it’s a 4‑rib belt roughly 37 inches long.
Common Applications
This belt is used mainly on A/C, alternator, power steering, or idler drives depending on the vehicle.
Typical fitments include:
Acura Legend (late 80s–early 90s)
Mazda Miata (mid‑90s)
Mitsubishi Eclipse / Expo / Laser
Hyundai Elantra / Sonata
Kia Sorento (early 2000s)
Dodge / Plymouth Colt
Some Freightliner MT45 trucks
Cross‑Reference Numbers
Equivalent part numbers you can use:
Gates: K040370
Goodyear / Continental: 4040370
ACDelco: 4K370
Bando: 4PK940
NAPA: 25‑040370
Duralast / Driveworks: 370K4
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