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

Restore factory-level damping and firm up a soft ride with this KYB shock absorber — the Gas-a-just High Pressure Monotube Gas Shock (MPN KG4539), a rear-position unit available as an OE monotube replacement. It fits the 1984-1985 and 1991-1992 BMW 318I, the 1991-1992 BMW 318IS, the 1986-1988 BMW 325, the 1984-1987 BMW 325E, and the 1988-1991 BMW 325I, 325IS, 325IX and M3 — see the Buyer's Guide tab for the full list.

  • High-pressure monotube design: separates the gas and oil for fade-free operation and instant response.
  • Two working chambers: an air-free hydraulic piston and valve area for responsiveness and control, plus a high-pressure nitrogen gas area with a floating piston.
  • Triple chrome-plated piston rod: an ultra-smooth surface helps reduce seal wear, since fluid leaking can be a cause of shock failure.
  • Added damping: adds up to 25% more damping performance over original equipment shocks, for vehicles that work, tow, or run larger, heavier tires and wheels.

As a KYB gas shock absorber, the Gas-a-just also helps keep Electronic Safety Systems performing as designed. To reduce the chance of noise and vibration, KYB recommends installing new strut mounts, part number SM5013.

Interchange: 69725 · 5947

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

69725, 5947

Frequently Asked Questions

Is this a front or rear shock absorber?

This is a rear-position KYB Gas-a-just monotube gas shock (MPN KG4539). Confirm the application in the Buyer's Guide tab for your specific BMW.

Is this the KYB Excel G shock absorber?

No. This is the KYB Gas-a-just High Pressure Monotube Gas Shock (MPN KG4539), which is a separate KYB product line from the Excel G shock absorber.

Does this fit a 1988-1991 BMW M3?

Yes, the 1988-1991 BMW M3 is one of the listed applications, along with the 325I, 325IS and 325IX of the same years. See the Buyer's Guide tab to confirm.

Should I replace both rear shocks at once?

Replacing shocks as a matched pair is recommended for balanced, even handling. This listing is for one shock; order two if you are doing both sides.

Do I need new strut mounts with this shock?

To reduce the chance of noise and vibration, KYB recommends installing new strut mounts, part number SM5013, when replacing the shock.

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