MajorCommonSuspension

Subaru Liberty: Front Knuckle Lower Ball Joint Failure

Front Knuckle Lower Ball Joint Failure is a common suspension fault on the Subaru Liberty on the 2003–2014 cars, and we rate it major. Putting it right costs $420 to $1,100 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 38 documented faults on the Subaru Liberty.

Vehicle: Subaru Liberty
Years: 2003–2014
Fuel: petrol
System: Suspension

This page covers the Subaru Liberty as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Subaru Liberty faults38 documented faults on this model

What you are looking at

What goes wrong

The front lower ball joint, which connects the lower control arm to the front steering knuckle, is a known wear item on BP and BR Liberty and Outback models that progresses to a safety-critical failure mode. The ball joint boot deteriorates allowing grease loss and water ingress, leading to accelerated wear of the ball and socket. As wear progresses the joint develops play, causing clunking over bumps. In advanced cases the joint can collapse, resulting in sudden loss of steering and wheel pull-under — a dangerous failure mode. On NZ roads with potholes and gravel surfaces, wear is accelerated. The joint is not individually serviceable on many sub-models and requires knuckle or arm replacement.

What you would notice

Clunking noise from front suspension over bumps, dips, or turning
Vague or wandering steering feel
Uneven or accelerated front tyre wear
Knock felt through floor or steering wheel on rough surfaces
Vehicle pulling to one side under braking

How to check it

Where to look. Front suspension, lower ball joint connecting lower control arm to front steering knuckle, both sides

Any play in the vertical axis indicates ball joint wear. Inspect the ball joint boot for cracks, splits, or missing grease. Check for rust on the joint body. Shake the lower arm to feel for looseness at the knuckle. Both sides should be inspected simultaneously for comparative wear. If a workshop inspection is possible: With the vehicle on a hoist, grasp the wheel at the 6 and 12 o'clock positions and attempt to rock it.

Parts involved: Ball joint.

What it costs to put right

$420 to $1,100 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Have the front ball joints been inspected or replaced?”
“Has the car had a wheel alignment recently and was anything noted?”
“Do you hear any knocking from the front suspension over bumps?”

Now check the Subaru Liberty you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Subaru Liberty buyer questions

Is front knuckle lower ball joint failure serious on a Subaru Liberty?

We rate it major and common on the Subaru Liberty. The front lower ball joint, which connects the lower control arm to the front steering knuckle, is a known wear item on BP and BR Liberty and Outback models that progresses to a safety-critical failure mode. The ball joint boot deteriorates allowing grease loss and water ingress, leading to accelerated wear of the ball and socket. As wear progresses the joint develops play, causing clunking over bumps. In advanced cases the joint can collapse, resulting in sudden loss of steering and wheel pull-under — a dangerous failure mode. On NZ roads with potholes and gravel surfaces, wear is accelerated. The joint is not individually serviceable on many sub-models and requires knuckle or arm replacement.

How much does it cost to fix on a Subaru Liberty?

$420 to $1,100 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Subaru Liberty years are affected?

Our research records this fault on the 2003–2014 Subaru Liberty. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.