Dayco 5030243 | Serpentine Belt

Part Number
Serpentine Belt

Fits: 95-05 Cadillac DeVille, 95-02 Cadillac Eldorado, 95-04 Cadillac Seville, 95-99 Oldsmobile Aurora, 01-03 Oldsmobile Aurora, 04-05 Pontiac Bonneville, 06-11 Buick Lucerne, 06-11 Cadillac DTS

Special Price $12.93 Regular Price $16.92
In stock
Free Shipping
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 Length24.25
Effective Length615.95
MaterialEPDM, Aramid Reinforced
Maximum Operating Temperature212
Maximum Operating Temperature100
Minimum Operating Temperature-45
Minimum Operating Temperature-42.7
Outside Circumference24.91
Outside Circumference632.72
Rib DepthStandard
Rib ProfileStraight Rib
StandardsSAE J1459, SAE J2432
Top Width.40



  • Goodyear: 4030242
  • NAPA: 25-70623
  • ACDelco: 3K243
  • General Motors: 12588412
  • General Motors: 12555957
  • General Motors: 3545016
  • CARQUEST: K030245
  • ACDelco: 3K245
  • CARQUEST: K030243
  • General Motors: 12557551
  • General Motors: 3455016
  • NAPA: 25-030243
  • General Motors: 12555597
  • Gates: K030245
  • Duralast: 243K3
  • NAPA: 25-030245
  • Goodyear: 4030245
  • Gates: K030243
  • General Motors: 12570499
  • Driveworks: 243K3


  • 1995-2005 Cadillac DeVille - Position: Water Pump
  • 2001-2003 Oldsmobile Aurora - Position: Water Pump
  • 1995-2002 Cadillac Eldorado - Position: Water Pump
  • 1995-1999 Oldsmobile Aurora - Position: Water Pump
  • 2006-2011 Buick Lucerne - Position: Water Pump
  • 1995-2004 Cadillac Seville - Position: Water Pump
  • 2006-2011 Cadillac DTS - Position: Water Pump
  • 2004-2005 Pontiac Bonneville - Position: Water Pump
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

Compatible Vehicles


You may also be interested in

Copyright © 2013-present PartsHawk, LLC. All rights reserved.