Parts for your 2018 Subaru Forester-Bump stops

2018 Subaru Forester bump-stops

Yes, bump-stops are fitted and absolutely relevant on the 2018 Subaru Forester (SJ). Technical references that specify them include the Subaru Forester (SJ) 2018 Factory Service Manual—Suspension sections—which list a “bump stopper” as part of both the front MacPherson strut assembly and the rear shock assembly. Subaru’s genuine parts catalogues also list front and rear bump stoppers (often paired with the dust boot), and major suspension manufacturers’ catalogues specify direct-replacement bump-stops for this model year. That’s clear evidence the vehicle relies on bump-stops by design.

On the 2018 Forester, bump-stops act like compact, progressive mini-springs that come into play at the end of the suspension’s travel. They stop the strut or shock from slamming metal-to-metal on big hits, keep tyres from smashing into guards, and protect internal shock valving. The result is better control, less noise and vibration, and longer life for the suspension—handy on rough Kiwi gravel or corrugated Aussie backroads.

Up front, the bump-stop sits on the strut shaft under the dust boot, at the rear it’s fitted to the shock assembly. Over time, they can harden, crack, or crumble—especially if soaked in oil from a weeping strut—or perish from UV and heat. While many last the life of the first set of shocks, it’s smart to inspect them during regular servicing, or at least every 20,000–30,000 kilometres, and always when replacing shocks, struts, or springs.

Signs they’re due for attention include:

• A harsh thud or bang on big compressions or with a loaded boot/roof rack
• Perished, split, or missing foam/polyurethane under the dust boot
• Clunks at full lock-to-lock kerb drops or off-road ruts
• Oil-soaked bump-stops caused by a leaking damper

Replacement is straightforward for a pro: the strut/shock is removed, the spring safely compressed, and the new bump-stop and boot slipped on before reassembly. It’s good practice to replace bump-stops and dust boots whenever fitting new shocks. Stick with OE-equivalent micro-cellular foam or high-quality polyurethane for the right progressive feel. If the Forester is lifted, tows, or runs heavier loads, extended or firmer-spec bump-stops may be advisable to prevent bottoming and tyre-to-body contact. After front strut work, an alignment check is recommended. For driveway tinkerers: use a proper spring compressor and follow torque specs from the service manual.

How long do bump-stops last on a 2018 Forester?

Typically as long as the original shocks, but climate, load, and road conditions matter. Expect 5–10 years in average use. Inspect them whenever the wheels are off for service, and replace if cracked, deformed, or oil-soaked.

Will worn bump-stops fail a WOF or RWC?

They can. If a missing or damaged bump-stop affects suspension travel or allows components to foul, an inspector may fail the vehicle. Even if it scrapes through, replacing a perished stop protects the shocks and keeps the ride compliant.

Do lift kits need different bump-stops on the SJ Forester?

Often, yes. With 25–50 mm lifts, extended or firmer bump-stops can prevent shock bottoming, tyre-to-guard contact, and poor CV angles at full compression. Match bump-stops to your springs, shocks, and intended use.