OE Quality
60-Day Returns

Rancho RS55188 Shock Absorber - Front
Overview of Rancho RS55188 Suspension Shock Absorber
The Rancho RS55188 suspension shock absorber is engineered for Nissan D21, Frontier, and Xterra models, providing reliable damping performance. Designed to meet specific vehicle requirements, this shock absorber supports improved ride control and handling.
- Part Number: RS55188
- Brand Line: RS5000X
- Compressed Length: 8.87 inches
- Extended Length: 12.7 inches
- Travel Length: 3.83 inches
- Extended Bumper Stop included
- Lower Mount: Loop bushing & sleeve mount (12mm sleeve ID x 1.1/4" sleeve OAL)
- Upper Mount: Stem mount (2.3/8" stem length x 3/8"-16 thread pitch)
- Reserve Tube Diameter: 2 inches
- Parts Pack Included: P01134
Details on the RS5000X Brand Line
The RS5000X series by Rancho is designed to offer consistent performance for light trucks and SUVs, including Nissan models like the D21, Frontier, and Xterra. This line focuses on delivering controlled damping with durable construction, suitable for both on-road and moderate off-road conditions. The RS55188 shock absorber is part of this series, featuring specifications tailored to maintain vehicle stability and comfort.
Technical Description of the RS55188 Shock Absorber
This suspension shock absorber features a compressed length of 8.87 inches and an extended length of 12.7 inches, providing a travel length of 3.83 inches. It includes an extended bumper stop to help protect the shock during full compression. The lower mounting uses a loop bushing and sleeve mount with a 12mm sleeve inner diameter and 1.25-inch outer length, while the upper mounting is a stem mount with a 2.375-inch stem length and 3/8"-16 thread pitch. The 2-inch reserve tube diameter supports consistent hydraulic performance. Note that this model does not include a compressed bumper stop or dust shield.
Applications and Problem Solving
- Compatible with Nissan D21, Frontier, and Xterra front suspension systems
- Addresses issues with worn or leaking factory shocks
- Improves vehicle handling and ride comfort on varied terrain
- Reduces excessive bouncing and body roll
- Helps maintain proper suspension travel and control
Installation Notes and Tips
- Verify compatibility with Nissan D21, Frontier, or Xterra front suspension before installation
- Use appropriate tools for loop bushing and stem mount removal and installation
- Inspect mounting hardware and replace if worn or damaged
- Follow torque specifications for upper and lower mounts to ensure secure fitment
- Check for proper shock travel and clearance after installation
Quality Assurance and Warranty
Rancho RS55188 shock absorbers are manufactured to meet OEM standards for durability and performance. The RS5000X line is designed for consistent operation under normal driving conditions. Warranty details should be confirmed with the product packaging or manufacturer documentation.
| Brand | Rancho |
|---|---|
| Part Number | RS55188 |
| Position | RS5000X, Front |
| LS23 | |
| S4 | |
| Compressed Bumper Stop | No |
| Compressed Length | 8.87 |
| Dust Shield Included | No |
| Extended Bumper Stop | Yes |
| Extended Hydraulic Lockout | No |
| Extended Length | 12.7 |
| Lower Mounting Description | Loop Bushing & Sleeve Mount - 12MM Sleeve ID X 1.1/4" Sleeve OAL |
| Parts Pack | P01134 |
| Reserve Tube Diameter | 2 |
| Travel Length | 3.83 |
| Upper Mounting Description | Stem Mount - 2.3/8" Stem Length X 3/8"-16 Thread Pitch |
This part fits 62 vehicles. Search below:
| Year | Make | Model | Body Type | Drive Type | Position | Notes |
|---|---|---|---|---|---|---|
| 2004 | Nissan | Frontier | Crew Cab Pickup | RWD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2004 | Nissan | Frontier | Extended Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2004 | Nissan | Frontier | Crew Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2004 | Nissan | Frontier | Extended Cab Pickup | RWD | Front | with Desert Runner Package; with Front Raised Height 0 (in); RS5000X |
| 2004 | Nissan | Frontier | Extended Cab Pickup | RWD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2004 | Nissan | Frontier | Extended Cab Pickup | 4WD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2004 | Nissan | Frontier | Crew Cab Pickup | RWD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2004 | Nissan | Frontier | Crew Cab Pickup | 4WD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2004 | Nissan | Xterra | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X | ||
| 2003 | Nissan | Frontier | Crew Cab Pickup | RWD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2003 | Nissan | Frontier | Extended Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2003 | Nissan | Frontier | Crew Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2003 | Nissan | Frontier | Extended Cab Pickup | RWD | Front | with Desert Runner Package; with Front Raised Height 0 (in); RS5000X |
| 2003 | Nissan | Frontier | Extended Cab Pickup | RWD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2003 | Nissan | Frontier | Extended Cab Pickup | 4WD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2003 | Nissan | Frontier | Crew Cab Pickup | RWD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2003 | Nissan | Frontier | Crew Cab Pickup | 4WD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2003 | Nissan | Xterra | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X | ||
| 2002 | Nissan | Frontier | Crew Cab Pickup | RWD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2002 | Nissan | Frontier | Extended Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2002 | Nissan | Frontier | Crew Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2002 | Nissan | Frontier | Extended Cab Pickup | RWD | Front | with Desert Runner Package; with Front Raised Height 0 (in); RS5000X |
| 2002 | Nissan | Frontier | Extended Cab Pickup | RWD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2002 | Nissan | Frontier | Extended Cab Pickup | 4WD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2002 | Nissan | Frontier | Crew Cab Pickup | RWD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2002 | Nissan | Frontier | Crew Cab Pickup | 4WD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2002 | Nissan | Xterra | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X | ||
| 2001 | Nissan | Frontier | Crew Cab Pickup | RWD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2001 | Nissan | Frontier | Standard Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2001 | Nissan | Frontier | Extended Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2001 | Nissan | Frontier | Crew Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2001 | Nissan | Frontier | Standard Cab Pickup | RWD | Front | with Desert Runner Package; with Front Raised Height 0 (in); RS5000X |
| 2001 | Nissan | Frontier | Extended Cab Pickup | RWD | Front | with Desert Runner Package; with Front Raised Height 0 (in); RS5000X |
| 2001 | Nissan | Frontier | Extended Cab Pickup | RWD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2001 | Nissan | Frontier | Extended Cab Pickup | 4WD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2001 | Nissan | Frontier | Crew Cab Pickup | RWD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2001 | Nissan | Frontier | Crew Cab Pickup | 4WD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2001 | Nissan | Xterra | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X | ||
| 2000 | Nissan | Frontier | Crew Cab Pickup | RWD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2000 | Nissan | Frontier | Standard Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2000 | Nissan | Frontier | Extended Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2000 | Nissan | Frontier | Crew Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 2000 | Nissan | Frontier | Standard Cab Pickup | RWD | Front | with Desert Runner Package; with Front Raised Height 0 (in); RS5000X |
| 2000 | Nissan | Frontier | Extended Cab Pickup | RWD | Front | with Desert Runner Package; with Front Raised Height 0 (in); RS5000X |
| 2000 | Nissan | Frontier | Extended Cab Pickup | RWD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2000 | Nissan | Frontier | Extended Cab Pickup | 4WD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2000 | Nissan | Frontier | Crew Cab Pickup | RWD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2000 | Nissan | Frontier | Crew Cab Pickup | 4WD | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X |
| 2000 | Nissan | Xterra | Front | with Rancho Suspension System; with Front Raised Height 2.5 (in); RS5000X | ||
| 1999 | Nissan | Frontier | Standard Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 1999 | Nissan | Frontier | Extended Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 1998 | Nissan | Frontier | Standard Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 1998 | Nissan | Frontier | Extended Cab Pickup | 4WD | Front | Front suspension strut for vehicles with 0" lift, suitable for installation.; RS5000X |
| 1994 | Nissan | D21 | Front | with Front Raised Height 2.5 (in); RS5000X | ||
| 1993 | Nissan | D21 | Front | with Front Raised Height 2.5 (in); RS5000X | ||
| 1992 | Nissan | D21 | Front | with Front Raised Height 2.5 (in); RS5000X | ||
| 1991 | Nissan | D21 | Front | with Front Raised Height 2.5 (in); RS5000X | ||
| 1990 | Nissan | D21 | Front | with Front Raised Height 2.5 (in); RS5000X | ||
| 1989 | Nissan | D21 | Front | with Front Raised Height 2.5 (in); RS5000X | ||
| 1988 | Nissan | D21 | Front | with Front Raised Height 2.5 (in); RS5000X | ||
| 1987 | Nissan | D21 | Front | with Front Raised Height 2.5 (in); RS5000X | ||
| 1986 | Nissan | D21 | Front | with Front Raised Height 2.5 (in); RS5000X |
* 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.