ACDelco 6K837 Serpentine Belt

Part Number
Serpentine Belt

Fits: 79-80 Ford Mustang, 79-80 Mercury Capri, 84 Ford LTD, 84-85 Mercedes-Benz 190D, 90-91 Mercedes-Benz 350SDL, 91 Mercedes-Benz 350SD, 92-94 Ford Ranger, 93 Cadillac Allante, 93-97 Cadillac Eldorado, 93-97 Cadillac Seville, 94-97 Cadillac DeVille, 94 Mazda B2300, 95-99 Oldsmobile Aurora, 05 Chrysler 300, 05 Dodge Magnum, 05-07 Ford Focus, 06-07 Lexus GS430, 06-09 Saab 9-3, 11-14 Hyundai Sonata, 11-15 Kia Optima, 13-16 Hyundai Santa Fe Sport, 14-15 Hyundai Tucson, 14-15 Kia Sorento, 14-16 Kia Sportage, 15 Hyundai ix35, 15 Mercedes-Benz C400, 15-17 Mercedes-Benz CLS400, 15-18 Mercedes-Benz E400, 15 Mercedes-Benz ML400, 15-16 Mercedes-Benz SL400, 16 Mercedes-Benz C450 AMG, 17-19 Mercedes-Benz C43 AMG, 17-18 Mercedes-Benz E43 AMG, 17-19 Mercedes-Benz GLC43 AMG, 17-19 Mercedes-Benz GLE43 AMG, 17-19 Mercedes-Benz GLS450, 17-18 Mercedes-Benz SL450, 17-18 Mercedes-Benz SLC43 AMG, 19-20 Mercedes-Benz E450, 19 Mercedes-Benz GLE400

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ACDelco Professional, premium aftermarket V-Ribbed Advanced Technology Belts serve as replacement belts for accessory belt drive systems (ABDS) and other serpentine belt applications. They are designed using advanced manufacturing technology and premium EPDM rubber construction to provide customers with superior accessory belt drive systems (ABDS) and new-vehicle-type performance. These premium aftermarket replacement v-ribbed advanced technology belts are manufactured to meet your expectations for fit, form, and function.



  • Able to operate and accept misalignment in the accessory belt drive systems (ABDS) far greater than other serpentine belts
  • Is the belt of choice by professional technicians, lasting 50% to 60% longer than retail belts (low priced belts sold at car part stores)
  • Its flexible construction allows the belt to withstand billions of topside and backside bends resulting in a long belt life
  • Its precision dimension control of rib profile transmits load efficiently throughout the accessory belt drive systems (ABDS) allowing components to operate at optimum levels
  • Made with temperature and crack resistant EPDM rubber for a long life and quiet, dependable performance
  • Manufactured using quality materials to help provide long life, minimize noise, reduce loss of tension, and solve problem applications


FAQ - A1Yes, this may be indicative of an alignment issue or a failed tensioner.
FAQ - A2Yes, you may lose your power steering or stall out. Your car is not drivable when your drive belt fails.
FAQ - A3Yes, the leading causes of belt failure are improper tension and misaligned pulleys. Both these conditions cause excessive heat which leads to belt failure. Have your belts checked every 3,000 miles for belt wear, proper tension, and pulley alignment.
FAQ - A4No, when the belt backing has been torn or cracked, the belt should be replaced.
FAQ - A5No, use the belt in the way it's listed in the ACDelco belts and hoses catalog.
FAQ - A6No, remember the leading cause of belt failure is improper tension and misaligned pulleys. Improper tension will cause the belt to slip and you may notice a loss of performance from the air conditioning system as well as increased heat under the hood. High heat can lead to premature accessory failure.
FAQ - Q1Could an automotive belt tear during use?
FAQ - Q2Will I know immediately if an automotive belt tears?
FAQ - Q3Are there steps I can take to ensure a longer automotive belt life?
FAQ - Q4Is there a way to repair a torn automotive belt?
FAQ - Q5Can I use the same automotive belt for multiple uses?
FAQ - Q6Will a worn automotive belt affect gas mileage?
Good Maintenance Practices - S1 B1Do not use belt dressings to stop belt slippage or noise. These are oil based and may cause belt deterioration.
Good Maintenance Practices - S1 B2Never twist a belt more than 90 degrees during inspection. This may damage the tensile cords and cause premature failure.
Good Maintenance Practices - S1 B3Replace serpentine belts every 60,000 - 100,000 miles. Check vehicle's owner's manual.
Good Maintenance Practices - S1 B4Replace V-belts after 3 to 4 years, or every 36,000 to 48,000 miles.
Good Maintenance Practices - S1 B5Use an approved tension gauge to check belt tension.
Good Maintenance Practices - S1 B6Check for proper belt tension after 500 to 1,000 miles following belt installation. Recheck often, at least twice a year or every 6,000 miles.
Marketing Statement - Product LineBuilt to meet the latest demands, ACDelco's Belts and Hoses line includes automotive belts and hoses, tensioners, pulleys, and kits. ACDelco offers a wide variety of Professional premium, aftermarket parts, and a select offering of GM Original Equipment Belts that fit a variety of vehicles on the road today.
Marketing Statement - Sub BrandWhen it comes to replacing your Belts, ACDelco offers a full line of Professional, premium aftermarket Belt products. To help make part replacement simple and precise, ACDelco also offers pulleys, tensioners, and kits. ACDelco Professional, premium aftermarket belts fit both GM and Non GM vehicles.
Measurements13/16 in x 84 1/4 in
Mkt_State_Warranty_CALimited Lifetime Warranty as long as original purchaser still owns vehicle (Parts Only).
Mkt_State_Warranty_USLimited Lifetime as long as original purchaser owns vehicle. (Parts Only)
Signs of Wear & Troubleshooting - S1 B1Rubber Loss: (most common belt wear) a belt wear gauge measures rubber loss, which can result in reduced power transfer from the crank to the accessories.
Signs of Wear & Troubleshooting - S1 B2Glazing: shiny spots can indicate a slipping belt that isn't properly transferring power to accessories.
Signs of Wear & Troubleshooting - S1 B3Pilling: worn rubber can fill in grooves and cause noise, heat, vibration, and excessive wear.
Signs of Wear & Troubleshooting - S1 B4Abrasion: wear along the side could indicate misalignment due to a failed tensioner.
Signs of Wear & Troubleshooting - S1 B5Cracking: older neoprene belts crack as they near the end of their life cycle and often need to be replaced.
Signs of Wear & Troubleshooting - S1 B6Engine stops or backfires.
Signs of Wear & Troubleshooting - S1 B7The belt is producing a squealing noise.
Signs of Wear & Troubleshooting - S1 B8Headlights dim while driving.
Signs of Wear & Troubleshooting - S1 B9Loss of battery charge.



  • 1979-1980 Ford Mustang
    • W/O A.C.
  • 2014-2015 Hyundai Tucson
  • 1991-1991 Mercedes-Benz 350SD
  • 1994-1994 Mazda B2300
    • W/A.C.
  • 2017-2017 Mercedes-Benz GLE43 AMG
  • 2018-2019 Mercedes-Benz GLS450
    • W/O Active Suspension
  • 2015-2015 Hyundai ix35
  • 1993-1993 Cadillac Allante
  • 2005-2005 Chrysler 300
  • 2011-2015 Kia Optima
  • 2006-2009 Saab 9-3
  • 1995-1997 Cadillac Seville - Position: Accessory Drive
  • 2017-2019 Mercedes-Benz C43 AMG
  • 2015-2016 Mercedes-Benz SL400
  • 2014-2016 Kia Sportage
  • 1984-1984 Ford LTD
    • W/O A.C.
  • 2014-2015 Kia Sorento
  • 2019-2019 Mercedes-Benz GLE400
    • W/O Active Suspension
  • 2006-2007 Lexus GS430
  • 1979-1980 Mercury Capri
    • W/O A.C.
  • 2015-2017 Mercedes-Benz CLS400
  • 1995-1997 Cadillac Eldorado - Position: Accessory Drive
  • 1984-1985 Mercedes-Benz 190D
  • 2018-2019 Mercedes-Benz GLE43 AMG
    • W/O Active Suspension
  • 2016-2016 Hyundai Santa Fe Sport
    • Dec. 12, 2015 & Older
  • 2015-2015 Mercedes-Benz ML400
  • 2015-2018 Mercedes-Benz E400
  • 1993-1994 Cadillac Seville
  • 2017-2019 Mercedes-Benz GLC43 AMG
  • 1995-1999 Oldsmobile Aurora - Position: Accessory Drive
  • 2005-2007 Ford Focus
    • W/O A.C.; W/O Calif. Emission System; Optional Belt
  • 2015-2015 Mercedes-Benz C400
  • 2016-2016 Mercedes-Benz C450 AMG
  • 1995-1997 Cadillac DeVille - Position: Accessory Drive
  • 1993-1994 Cadillac Eldorado
  • 2011-2014 Hyundai Sonata
  • 2017-2018 Mercedes-Benz SLC43 AMG
  • 1990-1991 Mercedes-Benz 350SDL
  • 2005-2005 Dodge Magnum
  • 2019-2020 Mercedes-Benz E450
  • 2017-2017 Mercedes-Benz GLS450
  • 1994-1994 Cadillac DeVille
  • 2017-2018 Mercedes-Benz E43 AMG
  • 1992-1994 Ford Ranger
    • W/A.C.
  • 2013-2016 Hyundai Santa Fe Sport
  • 2017-2018 Mercedes-Benz SL450
    • W/O Active Suspension
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