Parts for your 2021 Mitsubishi Asx-Bump stops

2021 Mitsubishi ASX bump-stops

Yes, the 2021 Mitsubishi ASX is fitted with bump-stops front and rear. This is confirmed by Mitsubishi Motors’ ASX/Outlander Sport/RVR workshop manuals for the 2019–2022 model years and corresponding parts catalogues, which list front strut jounce bumpers and rear bump stoppers. Major aftermarket catalogues from well-known shock manufacturers also list dedicated bump-stop and dust boot kits for 2010–2022 ASX models, reinforcing that they’re standard hardware on this platform.

What do they actually do? Bump-stops (also called jounce bumpers) act like a small, progressive auxiliary spring at the very end of suspension travel. When the ASX hits a big pothole, lands a speed hump too hot, or carries a decent load, the bump-stop steps in to prevent harsh metal-on-metal contact, protecting the struts, springs, upper mounts, control arms and body structure. They also help keep the tyres in contact with the road when things get rowdy, improving stability and reducing nasty thuds and vibration inside the cabin.

On the ASX, the front bump-stops live inside the MacPherson struts beneath the dust boots, while the rear setup uses separate bump stops mounted to the body or integrated with the rear dampers, depending on variant. Because the fronts are internal to the strut, any serious service usually happens when the struts are out for shock replacement.

Good servicing practice is simple: have them inspected at regular services (typically every 12 months/15,000 km, or sooner if you drive rough roads). Technicians look for perishing, cracking, missing chunks, or oil swelling from a leaky shock. Torn or missing dust boots are a red flag too, because they let grit chew through the bump-stop and strut rod. If one side is gone or soft, replace them in pairs and fit new boots at the same time. Front replacements require strut removal and a wheel alignment after refit, rears are usually quicker.

Signs it’s time: hard bottoming over big hits, a hollow clunk at full compression, harsher ride than usual, or uneven tyre wear after pothole impacts. Keep the factory ride height? Don’t trim bump-stops. Lowering or heavy-duty setups should use purpose-tuned bump-stops that match the new travel and load, rather than hacking the originals. Use quality microcellular polyurethane units from OEM or reputable aftermarket brands to maintain the ASX’s ride and handling.

• Inspect at each service or after off-road/loaded trips
• Replace in pairs with new dust boots
• Align the front end after strut work

Popular questions about 2021 Mitsubishi ASX bump-stops

Does a 2021 Mitsubishi ASX actually have bump-stops?

It does. Factory service documentation and parts listings identify front strut jounce bumpers and rear bump-stops on the 2021 ASX. Aftermarket parts catalogues also carry direct-fit bump-stop/boot kits for this model range, confirming they’re standard equipment.

When should ASX bump-stops be replaced?

Replace them when they’re cracked, squashed, oil-soaked, or missing, or whenever you’re fitting new shocks. Many owners see them last a long time, but by 80–120,000 km they’re often tired, especially if the vehicle has worked hard. Front replacement requires strut removal and a post-job wheel alignment, the rear is usually simpler.

Will worn bump-stops affect a WOF/roadworthy?

They can. While rules focus on overall suspension condition and control, missing or deteriorated bump-stops can contribute to harsh bottoming, poor handling, and damage to other components—issues that can lead to a fail. If a shock is leaking and has soaked the bump-stop, fix both to stay compliant and safe.