KYB SM5630 Coil Spring Insulator - Front Lower
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KYB
 Mount Components

KYB SM5630 Coil Spring Insulator - Front Lower

Brand KYB SM5630
Position Front Lower
Product line Mount Components
Fits Nissan · 10 vehicles

OE quality replacement. Designed to match or exceed original equipment.

Noise reduction. Helps eliminate squeaks, rattles, and vibration noise.

Spring insulator. Restores quiet, stable suspension performance.

Cross-references Nissan 540358J000 for the same application. See all 1.

$18.50Free shipping
In stock · usually ships same day before 1pm CST
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Order total $18.50
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Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Coil Spring Insulator options

KYB SM5630 Coil Spring Insulator

KYB SM5630 is a front lower coil spring insulator built to replace worn vibration isolators that can create noise and harshness in the suspension. It is a direct-fit mount component for select Nissan applications, including the Nissan Maxima and Nissan Altima.

As part of KYB’s Mount Components line, this spring insulator is made for application-specific OE-style replacement, helping restore proper spring seating and suspension feel. The KYB SM5630 is a practical choice when the original insulator has hardened, cracked, or compressed over time.

Key Features

  • High-quality replacement spring insulator for suspension service
  • Helps reduce squeaks, rattles, and vibration noise
  • Built to match or exceed original equipment design and quality
  • Application-specific fit for front lower suspension use
  • Part number SM5630 for easy identification

Product Details

KYB Mount Components are engineered as OE-quality replacement parts for suspension service, with attention to fit and function for each application. This coil spring insulator helps isolate the spring from the mounting surface, supporting quieter operation and more consistent suspension performance. It is a strong fitment-based solution for drivers searching for a Nissan Maxima front lower coil spring insulator or a Nissan Altima front lower spring seat replacement. This part cross-references Nissan 540358J000 for the same application.

Common Issues This Part Can Address

  • Squeaks from worn spring contact points
  • Rattles caused by hardened or deteriorated insulators
  • Vibration noise transmitted through the suspension
  • Poor spring isolation at the front lower mount
  • Replacement needs after age-related rubber wear

Installation Notes

Install SM5630 during suspension service when the original insulator shows cracking, flattening, or hardening. Verify the front lower position and confirm vehicle fitment before installation. Proper spring compression and suspension handling procedures are required during service.

Quality Assurance

KYB is known for OE-style suspension replacement components, and the Mount Components line is built to deliver application-specific fit and consistent quality for suspension repair.

Compatible Vehicles

  • Fits 2004-2008 Nissan Maxima, Front Lower
  • Fits 2002-2006 Nissan Altima, Front Lower

Related reading

This part fits 10 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2008NissanMaximaFront LowerMount Components
2007NissanMaximaFront LowerMount Components
2006NissanAltimaFront LowerMount Components
2006NissanMaximaFront LowerMount Components
2005NissanAltimaFront LowerMount Components
2005NissanMaximaFront LowerMount Components
2004NissanAltimaFront LowerMount Components
2004NissanMaximaFront LowerMount Components
2003NissanAltimaFront LowerMount Components
2002NissanAltimaFront LowerMount Components
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Nissan — 540358J000