Quiet the ride and cushion your suspension with the Mevotech Supreme Coil Spring Insulator MK160042, a popular replacement among Jeep WJ coil spring isolators. It serves as the rear lower insulator on the 1999-2004 Jeep Grand Cherokee, sitting between the coil spring and its perch to cushion the spring and help isolate road noise and vibration. See the Buyer's Guide tab for engine-level fitment.
A coil spring insulator prevents metal-to-metal contact between the spring end and its seat. When the original insulator hardens, cracks, or crushes, you may notice creaking, popping, or clunking from the suspension when going over bumps or loading the spring — signs it may be time to replace it.
Insulators wear on both sides of the axle, so inspect the opposite side and replace as needed for a balanced ride.
Interchange: TD4647W · CSI96575 · 52088402 · 52088402AB · K160042 · JSP5130S
This part cross-references / interchanges with the following part numbers:
What vehicles does the MK160042 coil spring insulator fit?
It fits the 1999-2004 Jeep Grand Cherokee. Check the Buyer's Guide tab to confirm the exact application for your vehicle.
Where is this insulator located?
It is the rear lower coil spring insulator, seating between the coil spring end and its perch on the listed applications.
What is the Mevotech Supreme insulator made of?
All moulded parts use 100% natural rubber, which the manufacturer states provides the best durability.
What are signs my coil spring insulator needs replacing?
Creaking, popping, or clunking from the suspension over bumps, or a hardened, cracked, or crushed insulator, may be signs it should be replaced. Diagnose the cause first.
Should I replace both sides at once?
Insulators wear on both sides of the axle, so it is good practice to inspect the opposite side and replace it as needed for a balanced ride.
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.
