HiAce Van: Clunking / knocking over bumps
Suspect the shock absorbers (upper and lower bushes) and the stabiliser links (bushes) first; they are tied in our cases. Both are perished rubber that knocks over bumps. Next come play in a hub bearing and the strut top mount. On a high-mileage HiAce, these suspension noises are almost always fixed with wear items.
What to suspect, in order
- How to tell (things you can check yourself)
- A knock or clunk from front or rear over bumps and rough roads. Torn bushes at the top or bottom of the shock, or oil seeping from the body. A floaty, bouncy ride is another sign.
- If you leave it
- Once the bush is gone, metal hits metal, the noise grows and the mounting is damaged. Lost damping also lengthens braking distance.
- Typical repair cost
- Too few cases with a recorded price to give a figure
- Typical model years and mileage
- Concentrated on high-mileage vehicles and those carrying loads.
- How to tell (things you can check yourself)
- A light rattling over a series of small bumps. Rocking the car produces noise from the suspension. Especially common on lowered vans.
- If you leave it
- Worn ball joints get louder and can eventually separate.
- Typical repair cost
- Too few cases with a recorded price to give a figure
- How to tell (things you can check yourself)
- Bump noise plus a speed-related drone. Play when the wheel is jacked up and rocked.
- If you leave it
- Play damages the brake disc; seizure is dangerous.
- Typical repair cost
- Too few cases with a recorded price to give a figure
- How to tell (things you can check yourself)
- A light metallic rattle over bumps and when turning the wheel. Play at the top of the shock (under the bonnet).
- If you leave it
- The reason the noise remains after new shocks.
- Typical repair cost
- Too few cases with a recorded price to give a figure
- How to tell (things you can check yourself)
- Not directly related to suspension noise; it appears here because it was replaced in the same job in one of the cases.
- Typical repair cost
- Too few cases with a recorded price to give a figure
Confirm with an inspection. Jacked up and rocked, torn bushes and play show immediately.
FAQ
- It's only a noise — can I leave it?
- For a while, but once the bush is gone metal-on-metal damages surrounding parts. Having it done with the inspection is cheapest.
- I can't tell where it's coming from
- Just saying front/rear and left/right speeds up the inspection. Have a passenger listen over bumps.
Sources
- Repair shop blogs (Japan)（6 cases）
No text is quoted from these sources. Only the facts of each case (model, symptom, cause, cost) are aggregated.
Reviewed by Tama Inc. (workshop certified by the Kanto District Transport Bureau) Reviewed on 2026-09-11 Updated 2026-09-11
This page shows what to suspect first, based on aggregated nationwide repair cases and our own experience. Always confirm the cause with an inspection. Repair costs are medians and ranges from the cases; they vary by vehicle condition, region and workshop.
Knocking is worn bushes. Replace the shock bushes top and bottom and the stab links in one go and it goes quiet in one visit.