Parts for your 2015 Subaru Forester-Bump stops

2015 Subaru Forester bump-stops: purpose, care and when to replace

Yes, the 2015 Subaru Forester is fitted with bump-stops (also called jounce bumpers). Technical sources confirm their use: the Subaru Factory Service Manual for the 2015MY Forester (SJ) lists a bump stopper within both the front strut and rear shock assemblies in the Suspension section, and the Subaru Electronic Parts Catalog for the same model shows dedicated parts for these components (commonly catalogued as front “Bumper–Strut” and rear “Bumper–Shock”, e.g., 20321SG000 and 20375SG000). Major damper manufacturers’ catalogues for SJ Forester struts and shocks also specify integrated bump-stop and dust-boot kits, further confirming fitment.

On this Forester, bump-stops are dense microcellular polyurethane foam pieces tucked under the dust boots. Their job is to act as a progressive cushion at the end of suspension travel, preventing metal-to-metal hits when the car bottoms out over big bumps, potholes, corrugations, or with a full load. They protect struts/shocks, top mounts, and control arms, help maintain geometry and tyre contact under extreme compression, and keep the ride quieter and more controlled.

As part of routine servicing, it’s smart to check the bump-stops any time the wheels are off or the dampers are being inspected—especially on vehicles that see gravel roads, towing, or roof loads. Foam can harden, crack, or crumble with age, UV, or oil contamination. If the dust boot tears, grit will chew out the bumper quickly. Many workshops in Australia and New Zealand replace bump-stops and boots whenever fitting new shocks/struts, because labour overlaps and the parts are relatively inexpensive.

Recommended practice for a 2015 Forester is to inspect every 40,000–60,000 kilometres or when there’s any ride harshness. Replace in axle pairs, and stick with genuine Subaru parts or reputable OE-equivalent foam bumpers. If the vehicle is lifted or lowered, confirm total bump travel, you may need appropriately sized bump-stops to avoid riding the stops (lowered) or over-compressing the dampers (lifted).

• Signs they need attention: a sharp “thud” on big hits, visible cracking or missing chunks, oil-soaked foam, or a torn/missing dust boot.
• Service tips: always renew the dust boot with the bump-stop, avoid solvent cleaners on foam, and torque all fasteners to the Subaru service manual specs. After front strut work, get a wheel alignment.

Popular questions

How do you know if the bump-stops are worn on a 2015 Subaru Forester?
Look for split or crumbling foam under the dust boots, listen for a harsh bottoming “thud” over big bumps, and watch for new knocks after loading the vehicle. If the boots are torn, assume the bump-stops need replacing too.

Should bump-stops be replaced with new shocks or a lift/lowering kit?
Yes, it’s good practice. When shocks or struts are out, replacing bump-stops and boots adds little labour and prevents future issues. For lift or lowering, choose bump-stops that suit the new travel to protect the dampers and mounts.

Is it safe to drive with a missing or damaged bump-stop?
It’ll still drive, but it’s risky. Without a proper bumper, the damper can bottom out, damaging the piston, top mount, and even tyres over time. Replace promptly to avoid costly suspension repairs.