Parts for your 2025 Mitsubishi Asx-Rack boots

2025 Mitsubishi ASX Rack Boots: What They Do and When to Replace Them

Based on technical references including the Mitsubishi Motors Service Manual (Steering, Group 37), the Mitsubishi ASA electronic parts catalogue listings for “Boot, Steering Gear” across ASX/RVR/Outlander Sport platforms, and the EU 2023–on ASX (Renault Captur-based) steering documentation, the 2025 Mitsubishi ASX uses a rack-and-pinion steering assembly fitted with protective rack boots (also called bellows). Whether it’s the long-running AU/NZ ASX platform or the newer EU Captur-based variant with electric power steering, both specify bellows-style rack boots to seal the inner tie rods and keep the rack ends protected. So yes—rack boots are absolutely relevant on the 2025 ASX.

Rack boots are the flexible rubber bellows at each end of the steering rack. Their job is to keep grit, water, and road spray out of the rack while holding in grease around the inner tie rods. On cars with electric power steering like the ASX, they also help keep moisture away from critical rack internals. When a boot splits, grease gets flung out, contaminants get in, and the inner tie rods and rack bushes can wear fast—turning a cheap boot into a bigger steering bill.

For servicing in Australia and New Zealand, it’s smart to have the rack boots checked at every service interval or WOF/rego inspection. They cop UV, heat, and stone strikes, so ageing and cracking are common. Typical signs they’re due include:

• Grease sling on the subframe or inside the wheel
• Visible splits or perishing in the bellows
• Clicking or play when rocking the wheel, or uneven tyre wear
• Moisture or grit inside the boot when compressed

Replacement is straightforward for a trained tech: wheels off, outer tie rod end off the knuckle, loosen the lock nut, slide off the old boot, clean and re-grease the inner joint, fit the new boot with proper clamps, then set toe and perform a wheel alignment. Always use the correct boot profile and clamps as specified in the parts catalogue, and tighten the tie rod lock nut to spec. Genuine or quality equivalent boots are worth it—they fit right, seal properly, and last longer.

If a split boot’s caught early, you’ll usually just need the boot and an alignment. Leave it too long and inner tie rods or the rack itself can wear, which gets spendy. A quick look at each service can save a lot of hassle down the road.

Popular questions about 2025 Mitsubishi ASX rack boots

How often should rack boots be replaced on a 2025 ASX?
There’s no fixed kilometre rule—the boots are replaced on condition. In Aussie and Kiwi conditions, have them inspected at every service. If they’re cracked, oily, or loose on the clamps, replace them straight away and get a wheel alignment.

Can rack boots be changed without removing the steering rack?
Yes. A technician can replace each boot by removing the outer tie rod end, sliding the old boot off, and fitting a new one with fresh clamps. The car will need toe adjustment afterwards, so budget for an alignment.

What happens if a torn rack boot isn’t fixed?
Dirt and water get into the inner tie rod and rack area, washing out grease and accelerating wear. That can lead to clunks, vague steering, uneven tyre wear, and eventually a costly rack or inner tie rod replacement.