Dayco 5040370 | Serpentine Belt

Part Number
Serpentine Belt

Fits: 87-90 Acura Legend, 90-94 Eagle Talon, 90-94 Mitsubishi Eclipse, 90-94 Plymouth Laser, 92-96 Eagle Summit, 92-95 Mitsubishi Expo, 92-94 Plymouth Colt, 93-94 Dodge Colt, 93-95 Hyundai Elantra, 93-94 Mitsubishi Expo LRV, 94-97 Mazda Miata, 99 Mitsubishi Eclipse, 99 Hyundai Sonata, 03-06 Kia Sorento, 13-16 Freightliner MT45

Special Price $20.00 Regular Price $23.99
In stock
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Estimated Ship Date: 1 Business Day or Less
Designed for high mileage multiple-accessory drivesthe Dayco® “W” profile belt (patent pending) is the most innovative advancement in multi-rib belt design in over 25 years. Developed through extensive laboratory and actual road mileage testing, this unique rib profile has been specifically Dayco® engineered to conform to high mileage, worn or misaligned drives without a sacrifice in quiet, long-lasting performance. The "W" profile cut into the tip of each rib makes the tip more flexible and eliminates belt chirp when the belt enters a worn or misalligned pulley. Constructed with Aramid reinforced EPDM compounds, the Dayco® “W” profile belt delivers more than OE required delivers the solution to troublesome drive problems. Dayco® Poly-Rib® Belts meet or exceed SAE J1459 and SAE J2432 specifications.

BRAND: Dayco




Cross SectionK-Section
Effective Length37.01
Effective Length940.06
MaterialEPDM, Aramid Reinforced
Maximum Operating Temperature212
Maximum Operating Temperature100
Minimum Operating Temperature-45
Minimum Operating Temperature-42.7
Outside Circumference956.82
Outside Circumference37.67
Rib DepthStandard
Rib ProfileStraight Rib
StandardsSAE J1459, SAE J2432
Top Width.54

Mfg. From 2/93



  • Ford: B376-15-909
  • Gates: K040370
  • Driveworks: 370K4
  • Mitsubishi: MD352284
  • Suzuki: 91940-09102
  • Chrysler: 949700-0420
  • NAPA: 25-70946
  • Mitsubishi: MD338461
  • Duralast: 370K4
  • Atlas: 4K0370
  • Beck/Arnley: 141-1332
  • Beck/Arnley: 146-040940
  • Beck/Arnley: 141-1354
  • Honda: 31110-PD2-0040
  • CARQUEST: K040370
  • Hyundai: 97713-28240
  • NAPA: 25-040370
  • Rover: 91940-09402
  • Bando: 4PK940
  • Kia: 97713-28240
  • V&W: 370K4
  • Mitsubishi: SSA921F024AR
  • Mazda: BPE8-15-909
  • Hyundai: 25212-38000
  • Pirelli: 372K4
  • Toyota: 99364-00940
  • AutoZone: 372K4
  • Goodyear: 4040370
  • ACDelco: 4K370


  • 1999-1999 Mitsubishi Eclipse - Position: Air Conditioning and Idler
  • 1990-1994 Eagle Talon - Position: Air Conditioning and Idler
  • 1994-1997 Mazda Miata - Position: Air Conditioning and Power Steering
  • 1993-1995 Hyundai Elantra - Position: Air Conditioning and Idler
  • 1993-1994 Dodge Colt - Position: Air Conditioning and Idler
  • 1999-1999 Hyundai Sonata - Position: Alternator and Water Pump
  • 1992-1995 Mitsubishi Expo - Position: Air Conditioning and Idler
  • 1993-1994 Mitsubishi Expo LRV - Position: Air Conditioning and Idler
  • 1992-1996 Eagle Summit - Position: Air Conditioning and Idler
  • 1990-1994 Mitsubishi Eclipse - Position: Air Conditioning and Idler
  • 1990-1994 Plymouth Laser - Position: Air Conditioning and Idler
  • 1987-1990 Acura Legend - Position: Air Conditioning and Idler
  • 1992-1994 Plymouth Colt - Position: Air Conditioning and Idler
  • 2003-2006 Kia Sorento - Position: Air Conditioning and Idler
Customer Questions
Can a serpentine belt cause smoke?
Yes, a serpentine belt can cause smoke. A serpentine belt is an essential component of a vehicle's engine system. It drives various accessories such as the alternator, power steering pump, water pump, and air conditioning compressor. If the serpentine belt becomes worn, damaged, or misaligned, it can cause friction and generate smoke.
Why is my serpentine belt squealing?
The serpentine belt can squeal due to various reasons, including tension issues, worn-out belt, or a problem with the belt's pulleys.
Is my serpentine belt too tight?
If your serpentine belt is causing issues like excessive noise or accelerated wear on the pulleys, it may indicate that the belt is too tight.
Why did my serpentine belt come off?
Serpentine belts can come off due to factors such as belt wear, improper tension, misaligned pulleys, or a faulty tensioner.
Please, mind that only logged in users can submit questions

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