Quiet the ride and cushion the rear coil spring with the KYB coil spring insulator SM5578, a REAR UPPER spring seat insulator that drops in for the 1998-2012 Honda Accord, 1999-2003 Acura TL, 2001-2003 Acura CL, 2004-2014 Acura TSX, 2010-2011 Honda Accord Crosstour, and 2012-2015 Honda Crosstour. It sits between the coil spring and its mounting seat to isolate the spring and dampen the squeaks, rattles, and vibration noises that develop as the original insulator hardens and ages.
See the Buyer's Guide tab for the full engine-level fitment on your specific vehicle. If a worn or hardened spring insulator is the source of your rear suspension noise, this replaces it.
Interchange: 905994
This part cross-references / interchanges with the following part numbers:
What is the KYB coil spring insulator SM5578?
It is a rear upper coil spring seat insulator that cushions the coil spring against its mounting seat to isolate it and dampen noise and vibration.
Which vehicles does this fit?
It fits the 1998-2012 Honda Accord, 1999-2003 Acura TL, 2001-2003 Acura CL, 2004-2014 Acura TSX, 2010-2011 Honda Accord Crosstour, and 2012-2015 Honda Crosstour. See the Buyer's Guide tab.
What position does it install in?
This insulator is cataloged for the rear upper position, seating between the coil spring and its upper mount.
Why replace a spring insulator?
Over time insulators harden and can transmit squeaks, rattles, and vibration noises through the suspension. Replacing a failed one restores cushioning at the spring seat.
What interchange number does it cross to?
This part replaces interchange number 905994.
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.
