Parts for your 2015 Mitsubishi Asx-Rack boots

2015 Mitsubishi ASX Rack Boots

Technical sources confirm the 2015 Mitsubishi ASX uses rack boots (also called steering rack bellows or gaiters). The Mitsubishi Motors Service Manual for ASX/RVR/Outlander Sport (MY2015, Group 37A – Steering) specifies rack-and-pinion steering with protective bellows boots on each end of the rack. The Mitsubishi ASA electronic parts catalogue for GA2W/GA3W lists a “steering gear bellows (boot)” left and right, and common aftermarket catalogues for the ASX (2010–2019) supply direct-fit rack boots. So yes—rack boots are fitted and relevant on this model.

On a 2015 ASX, the rack boots do a deceptively big job. They’re the flexible bellows that seal each end of the steering rack, keeping dust, water, and road grime out while holding the right amount of grease around the inner tie rod. That clean, lubricated environment helps the steering feel tight and consistent, protects the rack’s internal seals, and keeps the inner tie rods moving smoothly. If a boot splits, water and grit can sneak in, chewing out the rack and inner tie rods surprisingly quickly and potentially leading to play in the steering or notchy feel at the wheel.

As part of routine servicing, a quick visual check is the go. Look for cracks, splits, oil or grease flung around the boot area, or clamps that have loosened off. A torch helps—turn the wheel side to side to expose the bellows fully on each side. If there’s power steering fluid on an EPS ASX, that’s likely just grease wash-out or another leak nearby, the ASX uses electric assist, but the rack boots still need to be intact.

Replacement is straightforward for a pro: separate the outer tie rod end, measure or count threads to preserve alignment, slide off the old boot, clean and lightly regrease the inner joint, then fit a quality boot and secure new clamps. It’s best practice to book a wheel alignment afterwards to keep tyre wear even and the steering wheel dead straight. Choose OE-style boots with proper clamp ends rather than universal zip-tie fixes—cheap boots can collapse or rub through.

How often? There’s no strict kilometre interval, it’s condition-based. In Aussie and Kiwi conditions—heat, UV, gravel, and the odd puddle—boots can harden and crack with age. If one side fails, consider doing both sides together, especially if they’re the same age. Catching a tired boot early is far cheaper than a steering rack rebuild down the track.

• Check boots every service or 10,000–15,000 km.
• Replace immediately if split, perished, or oil-soaked.
• Align the vehicle after replacement.

Popular questions about 2015 Mitsubishi ASX rack boots

How do they know a rack boot needs replacing on a 2015 ASX?
They’ll spot visible splits or perishing in the bellows, grease flung onto the subframe, or feel looseness when the inner tie rod is checked with the boot compressed. Any tear that lets in grit is grounds for replacement, even if steering still feels OK. It’s a preventative fix to protect the rack.

Will a torn rack boot fail a WOF or roadworthy in AU/NZ?
Usually yes. Inspectors look for damaged steering dust boots that allow contamination. A split boot can be deemed unsafe due to the risk of accelerated wear and steering play. Expect to replace the boot and then do an alignment to pass.

Can they keep driving with a split rack boot?
Short trips to the workshop are fine, but extended driving isn’t wise. Water and grit can rapidly damage the inner tie rod and rack, turning a simple boot job into a much pricier steering repair. Getting it sorted promptly saves money and keeps the ASX steering sweet.