Keep your timing belt under correct tension and every valve event in sync with the Dayco Engine Timing Belt Tensioner Adjuster (P/N 85027). It installs as a direct-fit replacement on the 2001-2006 Audi A4, 2001-2005 Audi A4 Quattro, and 2001-2005 Volkswagen Passat, taking up slack in the timing belt so the camshaft and crankshaft stay properly timed.
Because timing belt tension is critical, have the cause of any noise or timing concern diagnosed before replacing, and follow the vehicle service procedure for correct belt routing and tensioning.
Interchange: 420-116 · 420116 · T43028
Manufacturer part number 85027.
This part cross-references / interchanges with the following part numbers:
What does this part do?
It is a timing belt tensioner adjuster that maintains proper tension on the engine timing belt, helping keep the camshaft and crankshaft timing synchronized.
Which vehicles does it fit?
It is a direct-fit replacement for the 2001-2006 Audi A4, 2001-2005 Audi A4 Quattro, and 2001-2005 Volkswagen Passat. See the Buyer's Guide tab to confirm your vehicle.
What numbers does it interchange with?
It cross-references to 420-116 (also shown as 420116) and T43028. The manufacturer part number is Dayco 85027.
What are signs the tensioner adjuster may need replacing?
Belt whine or rattle, a loose or fluttering timing belt, or trouble holding tension. If the tensioner adjuster is the cause, replacing it addresses the issue; diagnose first.
Should I replace anything else at the same time?
Many services renew the tensioner adjuster along with the timing belt and related components. Follow the vehicle service procedure for correct belt routing and tensioning.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
