A hub bearing is one of those hidden but critical suspension elements whose failure can lead to serious safety consequences for the vehicle. On models Skoda FabiaEspecially early generations, this unit experiences significant loads due to the features of the suspension design and the quality of the road surface. Ignoring the first signs of malfunction often ends with the wheel jamming or the destruction of the hub right in motion.
Many car owners Skoda Fabia It is mistakenly believed that backlash in the wheel is the norm for a used car, but this is a direct signal to immediate diagnosis. Wheel bearing It requires replacement when a characteristic hum appears, which varies depending on the speed and direction of rotation. Timely diagnosis and repair will help to avoid expensive repair of the brake system and discs.
In this article, we will discuss in detail how to replace this unit independently or with the help of a specialist, what tools will be needed and what to pay attention to when choosing spare parts. We will consider the nuances of the design of the front and rear wheels, as the technology of their replacement by the Skoda Fabia There are significant differences.
Diagnosis of the malfunction and characteristic symptoms
The first and most obvious sign of a hub bearing failure is specific noise. It is not the creaking of brake pads and not the hum of tires, but a low-frequency hum or howl, resembling the sound of a flying aircraft. The sound gets louder with the speed of the car. If you notice that the noise increases during acceleration and subsides when braking, the problem is most likely to lie in the bearing.
The second important symptom is a change in the tone of the sound when cornering. When you turn to the right, the load shifts to the left side, and if the hum increases, then the left one is defective. front wheel bearing. And when you turn left, you get a lot of noise from the right side. This is a simple test that allows you to localize the malfunction without complex equipment.
In some cases, especially with heavy wear, vibration of the steering wheel or the entire body may appear. This indicates that the destruction of bearing elements has already reached a critical stage. In such a situation, exploitation Skoda Fabia becomes dangerous, as possible complete destruction of the knot and jamming of the wheel on the move.
โ ๏ธ Note: If during the diagnosis you find a backlash in the wheel when it is swaying with your hands (up-down), the operation of the car is strictly prohibited. It's a sign that hub It has already lost its support and the wheel can come off at any time.
Selection of spare parts and necessary tools
When selecting a new bearing for Skoda Fabia It is important to note that there are many counterfeits on the market. Cheap analogues often do not care for 10-15 thousand kilometers. For reliability, it is recommended to choose products of well-known brands, such as: SKF, FAG, Timken or original parts VAG. Savings on this site are unacceptable, since the cost of replacement is incomparable with the risks.
Before starting work, the appropriate tool should be prepared. For Skoda Fabia A specific set will be required, including both standard keys and special devices. Without them, it is almost impossible to perform the work qualitatively, especially if it is a question of pressing the old node.
- ๐ ๏ธ A set of end heads and collars (including a 30 or 32 mm head for a hub nut).
- ๐ ๏ธ Removal of lock rings and press press (or set of filmmakers).
- ๐ ๏ธ Hammer, chisel and mount for dismantling.
- ๐ ๏ธ A jack and reliable stands for the body.
It is also worth buying new wheel mount bolts and, if necessary, a new brake disc, since when replacing the bearing, it is often necessary to remove it. It is important to check the status of hubs The presence of bullies that can place the installation of a new part.
- Original VAG
- SKF
- FAG
- Czech analogues
Step-by-step instructions for replacing the front bearing
Replacing the front wheel bearing with Skoda Fabia The process is time-consuming, requiring accuracy. You need to start with the weakening of the hub nut while the car is on the ground. This will require a powerful collar and a head of the right size. The nut is often tightened with great force, so additional force or a lever extension may be required.
After lifting the car and removing the wheel, it is necessary to dismantle the brake system caliper. It is important not to allow the caliper to hang on the brake hose, it must be hung on a wire or hook to the suspension spring. Then the brake disc is removed, which can stick to the hub, so sometimes neat tapping with a hammer is required.
The next stage is the detachment of the swivel fist from the shock rack and suspension levers. Here you will need to unscrew the mounting bolts, which are often covered with rust. Use the penetrating lubricant in advance. After that, the swivel fist must be carefully removed to access the bearing.
โ๏ธ Dismantling of the front node
The most difficult moment is the pressing of the old and pressing of the new bearing. In the garage, a hydraulic press is often used for this. If you donโt have access to the press, you can use special filmmakers, but the risk of damaging parts increases. Do not knock the old bearing through the inner ring, as this will destroy the protective seals and damage new parts during assembly.
After installing the new bearing, you must reassemble all the elements in the reverse order. Pay special attention to tightening the knuckle bolts and the hub nut. The tightening torque must be within factory specifications, otherwise the bearing will quickly fail. Don't forget to install a new locking pin or lock the nut.
Replacing the front bearing requires the use of a press to ensure proper installation. Attempts to knock it out with a hammer often lead to damage to the steering knuckle housing.
Features of replacing the rear bearing
Rear suspension design Skoda Fabia different from the front. Here a beam is often used and the wheel bearing is pressed directly into the hub or steering knuckle housing. In some modifications, the bearing is replaced along with the hub assembly, which simplifies the work, but increases the cost of the spare part.
First you need to remove the wheel and brake mechanism. If you have drum brakes, you will need to remove the brake drum. Sometimes it fits very tightly and requires the use of a puller or gentle tapping to remove it. It is important not to damage the brake wheel cylinder when removing the drum.
Next, you need to disconnect the ABS sensor if it is built into the bearing. Sensors are often fragile and can be easily damaged during removal. After this, the bolts holding the hub to the beam are unscrewed. If the bearing is replaced separately, you will need to press it out of the hub and then press in a new one.
The nuances of working with the ABS sensor
The ABS sensor is mounted on the top of the steering knuckle. When removing the old bearing, it may fall out. Inspect it for damage and be sure to clean the seat from dirt before installing a new unit.
If you are replacing the hub assembly, the process is greatly simplified. It is enough to remove the old hub and install a new one, after checking the condition of the brake drum. Make sure the new hub is compatible with your type of brake system (disc or drum).
After installing the new unit, it is necessary to adjust the brakes and check the operation of the ABS sensor. Errors in the operation of the system may cause the ABS lamp to light up on the dashboard. Check the connectors for oxidation and poor connections.
Before installing the new rear bearing, apply a thin layer of grease to the outer race and hub seat. This will make pressing easier and prevent corrosion.
Cost of work and comparison of options
Many car owners are wondering: is it worth changing the bearing themselves or contacting a service center? The cost of work in a specialized service center can be comparable to the price of the spare part itself. However, if you do not have experience or a special tool, it is better to entrust the work to professionals to avoid mistakes.
Below is a table with approximate prices for spare parts and labor for different models Skoda Fabia. Prices may vary depending on region and exchange rates.
| Node type | Cost of spare parts (analogue) | Cost of the original part | Cost of work (replacement) |
|---|---|---|---|
| Front bearing | 2500 - 4000 rub. | 6000 - 9000 rub. | 2500 - 4000 rub. |
| Rear bearing (separate) | 2000 - 3500 rub. | 5000 - 7000 rub. | 2000 - 3500 rub. |
| Rear hub assembly | 4500 - 6000 rub. | 9000 - 12000 rub. | 1500 - 2500 rub. |
| Set (front+rear) | from 5000 rub. | from 15,000 rub. | from 5000 rub. |
Please note that when replacing bearings on one side, it is recommended to check the condition of the bearing on the other side. If the car has a high mileage, the wear on the components will be approximately the same. Replacing both sides at once may be more cost effective in the long run.
Saving on the quality of spare parts when replacing bearings often leads to repeated repairs within a year. Choose trusted brands to ensure safety.
Frequently asked questions and answers
At the end of the article, we have collected answers to the most common questions that owners have. Skoda Fabia when replacing a wheel bearing. This knowledge will help you better understand the process and avoid common mistakes.
Is it necessary to do a wheel alignment after replacing a bearing?
Yes, after replacing the front wheel bearing, especially if you had to remove the steering knuckle, it is necessary to perform a wheel alignment adjustment. Any intervention in the suspension geometry can change the wheel alignment, which will lead to uneven tire wear and poor handling.
Is it possible to drive a car with a faulty wheel bearing?
It is possible for a short time and short distances to a service station, but with caution. However, if the bearing is already making a lot of noise or there is play, operation is prohibited. The risk of wheel jams and accidents is extremely high. It is better to call a tow truck or towing service.
Why did the new bearing make noise immediately after replacement?
This may be a consequence of incorrect installation (misalignment), dirt getting inside the unit during installation, or a manufacturing defect. It is also possible that the cage was damaged during pressing. In this case, the part should be returned under warranty and replaced with a new one.
How often do wheel bearings need to be replaced?
The average resource of a wheel bearing is 100-150 thousand kilometers. However, it depends on operating conditions, road quality and driving style. It is recommended to check their condition at every scheduled maintenance, especially if the car is operated in difficult conditions.
What to do if the hub nut does not unscrew?
If the nut is stuck, use a penetrating lubricant (like WD-40) and give it time to work. You can gently heat the nut with a torch, but be careful not to damage the seals and brake system. Use an extended wrench to increase leverage, but be careful not to hit it to avoid damaging the threads.