HomeSuspension > Suspension, Springs and Related ComponentsKYB SM5521 Coil Spring Insulator - Front Lower
Part #: SM5521

KYB SM5521 Coil Spring Insulator - Front Lower

Mount Components, Front Lower
⚙️ 20 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$23.36Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
📦Mount Components, Front Lower
🚗Fitment: Mercury and Nissan, Villager and Quest
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of KYB SM5521 Coil Spring Insulator

The KYB SM5521 coil spring insulator is designed to provide reliable suspension support for select Mercury and Nissan vehicles. This component helps reduce noise and vibration, contributing to a smoother ride in the Mercury Villager and Nissan Quest models.

  • Compatible with Mercury Villager and Nissan Quest
  • Part number SM5521 for precise identification
  • Coil spring insulator designed to minimize suspension noise
  • Part of the KYB Mount Components product line
  • Durable construction for consistent performance

About the KYB Mount Components Product Line

The Mount Components line from KYB focuses on suspension-related parts that support and isolate key components within the vehicle's suspension system. This product line includes coil spring insulators like the SM5521, which are engineered to reduce metal-to-metal contact and absorb vibrations. Using parts from the Mount Components line ensures compatibility and quality for suspension repairs and maintenance on compatible vehicles.

Product Details and Application

The KYB SM5521 coil spring insulator is specifically designed for use with the coil springs in the suspension systems of Mercury Villager and Nissan Quest models. By cushioning the coil spring, it helps prevent noise caused by metal contact and reduces wear on suspension components. This insulator is essential for maintaining suspension integrity and ride comfort in these vehicles.

Common Issues Addressed by the SM5521 Coil Spring Insulator

  • Eliminates squeaking or clunking noises from coil springs
  • Reduces vibration transmitted through the suspension
  • Prevents premature wear of coil springs and mounts
  • Improves overall ride smoothness in Mercury Villager and Nissan Quest
  • Helps maintain proper suspension alignment and function

Installation Notes and Tips

When installing the KYB SM5521 coil spring insulator, ensure the vehicle is securely lifted and the suspension is properly supported. Remove the old insulator carefully to avoid damage to the coil spring or surrounding components. Position the new insulator correctly on the coil spring to ensure effective noise reduction and vibration absorption. It is recommended to inspect related suspension parts during installation for any signs of wear.

Quality Assurance and Warranty

KYB is known for manufacturing suspension components that meet or exceed OEM standards. The SM5521 coil spring insulator undergoes quality checks to ensure durability and fitment accuracy for Mercury Villager and Nissan Quest models. While specific warranty details are not provided, KYB products typically come with a limited warranty covering defects in materials and workmanship.

This part fits 20 vehicles. Search below:

YearMakeModelPositionNotes
2002MercuryVillagerFront LowerMount Components
2002NissanQuestFront LowerMount Components
2001MercuryVillagerFront LowerMount Components
2001NissanQuestFront LowerMount Components
2000MercuryVillagerFront LowerMount Components
2000NissanQuestFront LowerMount Components
1999MercuryVillagerFront LowerMount Components
1999NissanQuestFront LowerMount Components
1998MercuryVillagerFront LowerMount Components
1998NissanQuestFront LowerMount Components
1997MercuryVillagerFront LowerMount Components
1997NissanQuestFront LowerMount Components
1996MercuryVillagerFront LowerMount Components
1996NissanQuestFront LowerMount Components
1995MercuryVillagerFront LowerMount Components
1995NissanQuestFront LowerMount Components
1994MercuryVillagerFront LowerMount Components
1994NissanQuestFront LowerMount Components
1993MercuryVillagerFront LowerMount Components
1993NissanQuestFront LowerMount Components

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

905924

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.