Parts for your 2018 Mitsubishi Outlander-Bump stops

2018 Mitsubishi Outlander bump-stops — what they do and when to replace them

Bump-stops (also called jounce bumpers) are absolutely fitted to the 2018 Mitsubishi Outlander. Technical references confirm it: the Mitsubishi Motors Workshop Manual for the Outlander (front suspension Group 33A and rear suspension) specifies a jounce bumper within the front strut assembly and a rear bump stop, and the Mitsubishi ASA electronic parts catalogue lists these components for the GF-series Outlander. Major shock and strut suppliers that catalogue parts for the 2018 Outlander also include integrated jounce bumpers or compatible bump-stop/boot kits, further verifying fitment.

On this model, bump-stops serve as the last line of defence for the suspension. They cushion the final part of travel under heavy loads, big potholes, or when towing, preventing metal-on-metal contact that can smash struts, bend arms, or deform mounts. The front bump-stops live inside the dust boots on the MacPherson struts, while the rears are mounted to the body to control compression of the multi-link suspension. They also help tune ride feel by progressively increasing spring rate at full jounce, so the Outlander stays composed when it bottoms out over rough roads.

While they don’t need attention as often as shocks or tyres, bump-stops are rubber or microcellular foam, so they can perish, crack, or crumble with age, heat, and road grime. Every time the Outlander is up on a hoist for scheduled servicing or when shocks/struts are replaced, it’s smart to inspect the bump-stops and dust boots. If they’re split, missing chunks, oil-soaked from a leaking strut, or simply gone, they should be replaced. Owners who tow, carry heavy loads, or regularly tackle corrugated roads across Australia or New Zealand will see faster wear and benefit from more frequent checks.

• Signs it’s time: harsh “thud” at full compression, reduced ride height under load, visible cracking or missing material, or bottoming out more often.
• Service tip: replace bump-stops in axle pairs (both fronts or both rears) to keep handling balanced.
• Efficiency: many replacement struts come with new boots and bump-stops, if not, add a boot/bump-stop kit during the job.
• Compatibility: stick with components specified for the 2018 Outlander’s VIN, FWD/AWD, and trim to ensure correct height and rate.

Properly functioning bump-stops protect expensive suspension bits, keep the Outlander quieter over big hits, and help it pass roadworthiness checks by preventing uncontrolled bottoming. They’re a small part that pulls a lot of weight in real-world driving.

FAQs

Do worn bump-stops affect a WOF or roadworthy check?
Yes. If a bump-stop is perished, missing, or allows the suspension to bottom out harshly, it can contribute to a fail. Inspectors in AU and NZ look for secure, serviceable suspension components. Replacing damaged bump-stops helps maintain safe travel limits and reduces impact loads on mounts and shocks.

Are the front and rear bump-stops the same on a 2018 Outlander?
No. Fronts are typically integrated with the strut boot as a jounce bumper, while rears mount to the body or subframe and are shaped for the multi-link geometry. They’re not interchangeable, use the correct part numbers for each end.

Can the Outlander be driven without a bump-stop?
It will move, but it’s not wise. Without a bump-stop, full-compression hits can smash the strut internals, deform top mounts, or damage control arms. The ride gets harsh and noisy, and repair bills can snowball. If one’s missing or crumbled, replace it promptly.