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KYB SM5559 Suspension Coil Spring Seat - Front Upper
| Brand | KYB SM5559 |
|---|---|
| Position | Front Upper |
| Product line | Mount Components |
| Fits | Nissan · 9 vehicles |
OE quality replacement. Designed for each application to match or exceed original equipment.
Noise reduction. Helps eliminate squeaks, rattles, and vibration noises.
Spring seat design. A suspension component made to support proper performance.
Cross-references Nissan 55040F4200, Nissan 540344B000 and Nissan 540404B000 for the same application. See all 3.
KYB SM5559 Suspension Coil Spring Seat
KYB SM5559 is a suspension coil spring seat and insulator replacement for select Nissan applications. It is built to replace worn vibration insulators that can create noise and reduce suspension refinement, with OE-style fitment for the listed vehicles.
Key Features
- OE-quality replacement spring seat for suspension service
- Helps reduce squeaks, rattles, and vibration noise
- Built to match or exceed original equipment design and quality
- Part of KYB Mount Components for suspension restoration
- Direct-fit service part for front upper mounting locations
Product Details
The KYB Mount Components line focuses on replacement suspension mounting parts that restore factory-like operation and ride feel. This spring seat is engineered for the front upper position on 1995-1999 Nissan Sentra and 1995-1998 Nissan 200SX applications, including the B14 Sentra with insulator notes as listed. KYB SM5559 is a practical choice when the original spring seat has hardened, cracked, or lost its ability to isolate vibration. This part cross-references Nissan 55040F4200 for the same application.
What It Helps Fix
- Suspension squeaks from worn upper spring seat material
- Rattling or clunking noises from deteriorated insulators
- Excess vibration transferred through the strut assembly
- Reduced suspension smoothness caused by aged mounting components
- Noise complaints after front suspension inspection or repair
Installation Notes and Tips
Install SM5559 in the front upper suspension location only for the listed Nissan Sentra and Nissan 200SX fitments. Verify the vehicle year, model, and suspension configuration against the notes before installation, especially on 1995-1999 Nissan Sentra B14 applications with insulator requirements. Inspect adjacent strut mount components for wear during service so the new spring seat is installed into a clean, properly serviced assembly.
Quality Assurance
KYB is known for OE-style suspension replacement components, and the SM5559 spring seat is built with the design and quality expected for factory-level service on the listed Nissan applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1999 | Nissan | Sentra | Front Upper | (B14); w/ Insulator; Mount Components |
| 1998 | Nissan | 200SX | Front Upper | Front suspension strut mount bracket; Mount Components |
| 1998 | Nissan | Sentra | Front Upper | (B14); w/ Insulator; Mount Components |
| 1997 | Nissan | 200SX | Front Upper | Front suspension strut mount bracket; Mount Components |
| 1997 | Nissan | Sentra | Front Upper | (B14); w/ Insulator; Mount Components |
| 1996 | Nissan | 200SX | Front Upper | Front suspension strut mount bracket; Mount Components |
| 1996 | Nissan | Sentra | Front Upper | (B14); w/ Insulator; Mount Components |
| 1995 | Nissan | 200SX | Front Upper | Front suspension strut mount bracket; Mount Components |
| 1995 | Nissan | Sentra | Front Upper | (B14); w/ Insulator; Mount Components |
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