Parts for your 2017 Subaru Impreza-Bump stops

2017 Subaru Impreza bump-stops — purpose, care, and when to replace

Yes, the 2017 Subaru Impreza is fitted with bump-stops (also called bump rubbers or jounce bumpers). Subaru’s factory service information for the 2017MY Impreza (front MacPherson strut and rear shock/coil assemblies on the Subaru Global Platform) lists a “bump rubber” as part of each strut/shock, and Subaru genuine parts catalogues for this model show dedicated front strut and rear shock bump-stop components. So they’re very much relevant to this vehicle’s suspension.

Bump-stops act as the suspension’s safety net. They’re dense foam or microcellular polyurethane pieces that sit on the strut/shock shaft and step in right at the end of travel. On the Impreza, they stop the suspension from smashing metal-to-metal over big hits, protect the strut internals, and keep the geometry in check when the car’s fully loaded or lands after a sharp bump. They also help tune the last bit of firmness so the ride stays controlled rather than crashy.

For servicing, they’re not a high-wear item like brake pads, but they do age. Heat, road grime, and oil mist can make them go soft, crack, or crumble. A good workshop will inspect them whenever the wheels are off, during shock/strut checks, or around major services. Practical tips for a 2017 Impreza owner:

• Inspect bump-stops and dust boots any time the struts/shocks are out, or every 40,000–60,000 km during a suspension check.
• Replace if they’re split, oil-soaked, permanently compressed, or missing sections. If a strut is being replaced, it’s smart to fit new bump-stops and dust boots at the same time.
• If the car’s been lowered, expect the bump-stops to engage more often, consider shortened or progressive bump-stops matched to your spring rate.
• After front strut removal/refit, get a wheel alignment to keep tyre wear tidy and handling sweet.

Signs they’re on the way out include a harsh “thud” over big potholes, the car bottoming out with luggage or passengers, and torn dust boots exposing a chewed-up foam bumper. Keeping them healthy protects your shocks/struts, reduces the chance of bent components after big hits, and preserves that planted, confidence-inspiring feel the Impreza is known for.

Popular questions about 2017 Subaru Impreza bump-stops

How do you know if the bump-stops need replacing?
Look for cracks, chunks missing, or foam that’s gone mushy or oil-soaked. On the road, repeated bottoming-out or a sharp, unpleasant thud over big bumps points to tired bump-stops or worn shocks. A quick inspection when the wheels are off will usually tell the story.

If the dust boot is torn, check the bump-stop underneath—it often means grit’s got in and started the damage. If in doubt, replace them when you’re doing shocks or springs.

Do you need a wheel alignment after replacing bump-stops?
For the front, yes—because the strut needs to come out to access the bump-stop, which can alter alignment. A post-job alignment keeps steering straight and tyre wear even. The rear can often be done without disturbing alignment, but many shops still check it to be safe.

Are upgraded bump-stops worth it on a lowered 2017 Impreza?
They can be. Lowering reduces available travel, so progressive or shortened bump-stops help maintain ride quality and control at the end of travel. Match them to your springs and shocks rather than running generic pieces—proper tuning makes a noticeable difference on rough Kiwi and Aussie roads.