Parts for your 2007 Mazda Premacy-Bump stops

2007 Mazda Premacy bump-stops: what they do and when to replace them

Based on technical sources, the 2007 Mazda Premacy (CR, also sold as Mazda 5) is fitted with bump-stops front and rear. The Mazda 5/Premacy Workshop Manual lists a jounce bumper (bump-stop) within both the front MacPherson strut and the rear shock absorber assemblies, and the Mazda Electronic Parts Catalogue for the CR chassis identifies “BUMPER/STOPPER, SHOCK ABSORBER” for each axle. Major suspension suppliers (e.g., KYB and Monroe) also catalogue combined dust boot and jounce bumper kits specifically for this model, confirming their use.

On a 2007 Mazda Premacy, bump-stops are small foam or polyurethane buffers that live on the damper shaft, tucked under the dust boot. They’re a safety net when the suspension runs out of travel, preventing harsh metal-to-metal bottoming. That saves the damper internals, keeps the spring rate progressive at the end of the stroke, and helps stop the tyres from smashing into the guards over big hits or when loaded up with the whānau and gear.

During regular servicing, it’s worth giving them a look. The Mazda workshop guidance calls for inspection of suspension components for damage or deterioration, and industry practice from damper manufacturers is to renew bump-stops whenever shocks/struts are replaced. On a Premacy, they can crumble with age, go mushy from oil contamination, or split from repeated hard impacts. If they’re cracked, missing chunks, oil-soaked, or completely gone, replace them—ideally in axle pairs to keep handling even left-to-right.

Because the fronts live inside the strut, replacement means removing the strut and safely compressing the spring. The rears are simpler but still require removing the shock. Always fit new dust boots with the bump-stops, the boot protects both the damper seal and the bump-stop from grit and UV. Avoid gripping the damper shaft with tools, and follow the workshop manual torque specs for the top nut and lower fasteners.

If the Premacy has been lowered, travel is reduced, so the car will ride the bump-stops more often. In that case, use model-appropriate, shortened or higher-density bump-stops to preserve ride and control, and check clearances under full bump. Typical inspection cadence is every 20,000–30,000 km or annually, and any time there’s a knock over big bumps, a harsh “slam” at full load, or you’re fitting new shocks/struts.

• Symptoms of tired bump-stops: sharp bottoming over speed humps, clunks at full compression, visible crumbling under the boot, or uneven handling under load.
• Best practice: replace in pairs, add new boots, and get a wheel alignment after front strut work.

Popular questions about 2007 Mazda Premacy bump-stops

How can someone tell if the Premacy’s bump-stops need replacing?
Look for cracking, missing sections, or perished foam under the dust boot. On the road, signs include a harsh “bang” over big bumps, clunks at full compression, or scuffed inner guards from the tyre touching. If shocks are being replaced, it’s smart to renew bump-stops and boots at the same time.

Will worn or missing bump-stops affect a WOF/roadworthy?
They can. Inspectors may fail a vehicle if suspension components are damaged or missing, and a perished or absent bump-stop can be noted because it compromises suspension control and safety. Replacing them restores proper end-of-travel support and helps pass inspection.

Is it safe to drive without bump-stops?
Not really. Without them, heavy hits can bottom the suspension, damaging the damper, bending mounts, and upsetting tyre contact. It also increases the chance of the tyre contacting the body under load. Fit the correct replacements as soon as practical.