Car Drops While Parked
Some sag while parked is normal — every system loses a little air. But if the car is on the ground after one night, or drops visibly within hours, you have a leak that needs repair.
Likely causes
- Slow air spring leak
Most common. The leak is small, so it takes hours to show.
- Valve block leak
Drops a whole axle or both sides together.
- Air line fittings
Slow weeping at quick-connect fittings that only shows after long parking.
- Air retention valve
Some systems have valves holding air in the spring — a failure means gradual sag.
What to do right now
- Measure it: how far does it drop in 12 hours? A centimetre or two is normal; more means a leak
- Note whether it's one corner or a whole axle — that tells us where to look
- A car that still rises normally at start-up is safe to drive, but don't put it off
- Send two photos: one after long parking, one after start-up
What it typically costs
Pressure leak testing is part of the free inspection. Repair depends on the source: an air spring, the valve block, or an air line fitting — the fitting is usually the simplest and cheapest.
Related service
Hydraulic Suspension Repair — Rebuild and repair air/hydraulic suspension instead of full replacement.
Send us a video of the car
A short video of the car parked and another after start-up gives us an accurate initial read before you even come in.