KYB Suspension Shock Absorber KG4539
KYB Suspension Shock Absorber KG4539

KYB Suspension Shock Absorber P/N:KG4539

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$57.99
MPN: KG4539
UPC: 781552045397
Item Package Quantity: 1
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KYB Suspension Shock Absorber P/N:KG4539
KYB Suspension Shock Absorber P/N:KG4539
$57.99

Firm up the back of your BMW 3 Series with the KYB Gas-a-just Suspension Shock Absorber KG4539, a high-pressure monotube gas shock that installs as a direct-fit rear replacement for the 1984-1985 and 1991-1992 BMW 318I, 1991-1992 BMW 318IS, 1986-1988 BMW 325, 1984-1987 BMW 325E, and the 1988-1991 BMW 325I, 325IS, 325IX, and M3. Its components and valving are designed specifically for the BMW 3 Series; see the Buyer's Guide tab for engine-level details.

  • Two-chamber monotube design: an air-free hydraulic piston and valve area for responsiveness and control, plus a high-pressure nitrogen gas area with a floating piston for a comfortable ride during normal driving and added performance on demand.
  • Fade-free operation: the high-pressure monotube separates the gas and oil for fade-free damping and instant response.
  • Triple chrome-plated piston rod: an ultra-smooth rod helps reduce seal wear, since fluid leaking can be a cause of shock failure.
  • Extra damping: adds up to 25% more damping over original-equipment shocks and higher gas pressure to help improve steering response.

KYB recommends installing new strut mounts (part number SM5013) to reduce the chance of noise and vibration. Helps keep Electronic Safety Systems performing as designed.

Interchange: 69725 · 5947

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

69725, 5947

Frequently Asked Questions

What is the KYB KG4539?

It's the KYB Gas-a-just, a high-pressure monotube gas rear shock absorber that installs as a direct-fit replacement for the listed BMW 3 Series applications.

Which vehicles does this shock fit?

It fits the 1984-1985 and 1991-1992 BMW 318I, 1991-1992 318IS, 1986-1988 325, 1984-1987 325E, and the 1988-1991 325I, 325IS, 325IX, and M3. See the Buyer's Guide tab for engine details.

What does the monotube gas design do?

It uses an air-free hydraulic piston/valve area for control and a high-pressure nitrogen gas chamber with a floating piston, separating gas and oil for fade-free operation and instant response.

Should I replace the strut mounts too?

KYB recommends installing new strut mounts (part number SM5013) to help reduce the chance of noise and vibration during use.

How many shocks should I order?

This listing is for one shock. Replacing shocks as a matched pair on the same axle is recommended for balanced, even damping.

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