KYB Suspension Strut and Coil Spring Assembly P/N:SR4051

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$290.99
MPN: SR4051
UPC: 781552633143
Item Package Quantity: 1
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KYB Suspension Strut and Coil Spring Assembly P/N:SR4051
KYB Suspension Strut and Coil Spring Assembly P/N:SR4051
$290.99

Restore proper rear ride height and settled handling with the KYB strut plus complete strut and coil spring assembly (SR4051), a pre-assembled rear corner unit that drops in as a direct-fit replacement for the 2002-2005 Ford Explorer and 2002-2005 Mercury Mountaineer. Built on an OE-restoring KYB Strut-Plus platform, it combines the strut, mount and spring into a single ready-to-install unit so you can replace a worn or leaking rear corner in one step.

  • Complete corner unit: includes a KYB Excel-G strut, mount and spring — as a KYB quick strut assembly, everything is engineered and pre-assembled for professional results.
  • High carbon steel coil spring: an application-engineered spring designed to match the strut, maintain proper ride height and control weight without sacrificing ride quality.
  • Stronger build: a stronger steel outer shell with KYB's application-specific, precision-designed damping valves. Assembled in USA.
  • Electronic safety systems: engineered to help vehicles equipped with electronic safety systems (ESC, ABS, etc.).

A strut assembly supports vehicle weight, determines ride height and helps control stability. Signs this rear assembly may need replacing include excessive bounce, sagging ride height, a knocking noise over bumps, or fluid seepage from a worn strut.

Interchange: G57018 · 171322

This part cross-references / interchanges with the following part numbers:

G57018, 171322

Frequently Asked Questions

What is the KYB Strut-Plus SR4051?

It's a pre-assembled rear corner unit that combines a KYB Excel-G strut, mount and high carbon steel coil spring into one ready-to-install unit for the listed applications.

Is this a front or rear assembly?

This is a rear strut and coil spring assembly.

Does this KYB strut plus assembly fit my vehicle?

It's a direct-fit rear replacement for the 2002-2005 Ford Explorer and 2002-2005 Mercury Mountaineer. Check the Buyer's Guide tab to confirm your exact model.

Should I replace both sides at once?

Struts wear gradually, so replacing both rear corners as a matched pair is recommended for balanced handling and even ride quality. This listing is for one assembly.

What numbers does this assembly interchange with?

This KYB complete strut replaces G57018 and 171322.