Short answer: you can drive on a mildly clicking CV joint for a short while, but not indefinitely. Once the boot has split or the clicking happens on every turn, the joint is already contaminated and wearing fast, and a full failure can mean sudden loss of drive to that wheel. Get it checked, and expect it to come up on your next WOF regardless.
The honest answer: it depends how bad it already is
A CV joint, short for constant velocity joint, sits at each end of the driveshafts that carry power from the gearbox out to the front wheels (and on some 4WDs and utes, the rear wheels too). It is designed to keep turning smoothly no matter what angle the wheel is sitting at, whether you are cruising straight down State Highway 1 or turning tight into a supermarket carpark. A rubber boot packed with grease seals the joint and keeps grit, water and road salt out.
The moment that boot splits, the clock starts. Grease slowly flings out under centrifugal force, dirt and moisture work their way in, and the joint starts wearing at a rate it was never designed for. That is why the honest answer to “can you drive with a bad CV joint” is not a flat yes or no, it depends entirely on how far along that process already is.
What the symptoms actually mean
The classic warning sign is a clicking or popping noise from a front wheel area when turning at low speed, most noticeable pulling into a driveway or doing a tight U-turn in a car park. That clicking is the outer joint’s internal bearings moving over worn or contaminated surfaces. On its own, and only on tight turns, it is a sign to get it looked at soon rather than an immediate emergency.
Beyond that first stage, watch for these escalating signs:
- Clicking that has spread from tight turns only to every turn, including gentle motorway lane changes
- A clunk when you shift from reverse to drive, or accelerate hard from a stop
- Grease flecked around the inside of a wheel rim or splattered along the inner guard, a strong sign the boot has already split
- Vibration through the steering wheel that gets worse with speed, which points to a worn inner joint rather than the outer one
- Visible torn rubber or a missing boot altogether when you look at the driveshaft from underneath
If you are only hearing the mildest version, an occasional click on a full-lock turn, most drivers keep driving on it for a while. That is common, but it is not really safe long term, because the internal damage is already progressing even when the noise is barely noticeable.
Why it eventually becomes unsafe rather than just annoying
A CV joint does not go from clicking to catastrophic failure overnight, but it does not sit still either. As the joint wears, the bearings and cage inside develop more play, the clicking gets louder and more frequent, and eventually the joint can bind or, in the worst case, separate completely. When that happens on a driven wheel, you lose drive to that side of the car immediately. It is not usually a case of the wheel falling off, driveshafts are engineered to stay physically connected even after the joint itself has failed, but the sudden loss of power delivery and the noise and vibration that comes with it is genuinely dangerous if it happens while you are turning into an intersection or merging onto the expressway.
There is also a knock-on cost to waiting. A joint that fails completely, rather than being caught while it is just clicking, often takes the boot, the grease, and sometimes the axle shaft itself with it, turning what could have been a straightforward boot and repack job into a full CV axle replacement.
Repair versus replace
This is the question worth understanding before you book anything in. If a boot has split very recently and the joint has not yet had a chance to click, rattle or grind, it can sometimes be cleaned out, repacked with the correct grease and fitted with a new boot, saving the joint itself. That window is narrow. Once dirt, water or road grit has had time to work its way into the joint, or the joint is already making noise, the wear is done and cannot be undone by cleaning it. At that point the standard fix is a full CV axle assembly, joint, boot, grease and shaft as one unit, because that is how they are supplied and how the labour works out most efficiently in practice.
Our CV joint and axle repairs page covers what we check and how we assess whether a boot-only repair is still viable on your vehicle.
Will a bad CV joint fail your WOF
Yes, and this catches a lot of drivers out. A split, torn or missing CV boot is a defect item under the NZTA Vehicle Inspection Requirements Manual, because it is a driveline safety component. If your WOF is coming up and you have noticed clicking on turns, budget for the possibility that the boot, or the whole axle, will be flagged. A multi-point vehicle inspection before your WOF is due will pick this up along with anything else developing underneath the car, so there are no surprises on inspection day.
What it typically costs
Across New Zealand, CV joint and axle repairs typically cost between $250 and $900 depending on whether it is a boot and repack, a single axle replacement, or both sides, and on the make and model of vehicle. The exact price depends on your vehicle and the extent of the work, including whether the joint itself is salvageable or a full axle assembly is needed. For an accurate quote for your vehicle, get in touch with our team.
Get it checked before it decides for you
A clicking CV joint rarely gets better on its own, and the cost of catching it early is almost always lower than the cost of catching it late. If you have noticed clicking on turns, a clunk on acceleration, or grease around a wheel rim, book it in at our Frankton workshop and we will put it on the hoist, check the boots and joints on both sides, and give you a clear answer on repair versus replacement before any work starts. Call us on (07) 847 3339 to get it looked at.