Symptoms of a malfunctioning hub assembly on Nissan Almera G15 are often ignored by drivers until the wheel becomes critically jammed. A characteristic hum, varying depending on the speed and direction of the turn, is the first signal that the internal structure wheel bearing destroyed. Owners of this sedan are often faced with the fact that repairs are required after a mileage of 60 to 100 thousand kilometers, especially if the car was operated on bad roads.
Neglecting to replace a part not only leads to noise in the cabin, but also serious safety risks. A damaged element can lead to wheel jamming while driving, which can lead to loss of control and an accident. In addition, play in the hub destroys the seats on steering knuckle, which turns a simple replacement into an expensive repair of the entire suspension. Therefore, diagnostics and timely repairs are a mandatory procedure to maintain serviceability. Nissan Almera.
Symptoms and diagnosis of node malfunction
You can determine that the problem is in the wheel bearing by a number of external signs that become noticeable when driving. The most obvious symptom is an increasing hum or howl that becomes louder as the engine speed and vehicle speed increase. The sound often mimics the operation of a faulty engine or transmission, but the key difference is its dependence on the load on a particular wheel.
When driving in a straight line, the hum may be monotonous, but when entering a turn, the nature of the sound changes. If the left bearing is humming, then when you turn right, the load on it increases and the sound intensifies. When turning left, the weight of the car is transferred to the right wheel, and the left unit is unloaded, which is why the noise subsides or disappears completely. This is a classic sign that allows you to accurately localize a fault without complex equipment.
In addition to acoustic signals, it is worth paying attention to the behavior of the steering and braking systems. In advanced cases, steering wheel vibration appears, which intensifies when braking. This is due to the fact that the destroyed wheel bearing cannot provide rigid fixation of the wheel, creating play in the rotation axes. You may also experience uneven wear on the brake pads, as the disc begins to “walk” relative to the caliper.
For a final check, you need to lift the car on a lift and rock the wheel by hand. If, when rocking in a vertical plane (from top to bottom), a noticeable play is felt, and a crunching or grinding noise is heard when the wheel rotates, then the part must be replaced immediately. Ignoring these signals may result in the hub simply falling out of the steering knuckle while driving.
Necessary tools and spare parts selection
Before starting work, it is important to prepare the entire set of tools, since the process of replacing a wheel bearing requires significant physical effort and specific keys. You will need standard socket and socket wrenches of 17, 19, 21 and 24 millimeters. Pay special attention to a 24 or 27 wrench (depending on the year of manufacture) to unscrew the hub nut, which is tightened with a huge tightening torque.
A critical tool is the bearing puller. In a garage, a hydraulic press is often used, but for Nissan Almera G15 You can get by with a specialized puller for wheel bearings or a powerful mount with a set of mandrels. You will also need a torque wrench to properly tighten the hub nut, since under- or over-tightening will lead to rapid failure of the new part.
When choosing spare parts for the spare parts market for Nissan Almera filled with both original parts and high-quality analogues. The original from Nissan has a high service life and perfect build quality, but its price may be too high. Many experts recommend proven brands such as Koyo, Kayaba, NTN or FAG, which produce these components for the manufacturer.
Be sure to check the package contents. Ideally, the new bearing should come complete with the hub, since pressing only the inner ring of the bearing into the hub without special equipment often leads to deformation. If you get a separate bearing, make sure it has an ABS sensor (if your car has anti-lock braking system), as older models may have been supplied without one.
- ✅ Hydraulic press or wheel bearing puller
- ✅ Torque wrench with a range of up to 250 Nm
- ✅ Set of sockets and extensions
- ✅ Hammer and chisel for knocking out the nut
- ✅ WD-40 or similar penetrating lubricant
Removing the old hub assembly
The process begins with preparing the car: place it on a level surface, turn on the handbrake and place chocks under the rear wheels. Remove the wheel from the side where you plan to replace it. Unscrew the protective cap of the hub nut (if equipped) and bend back the lock washer. The hub nut often gets stuck, so before you start unscrewing, generously spray the threads with penetrating lubricant.
To unscrew the hub nut, you will need an assistant to press the brake pedal to secure the disc. If you don't have an assistant, you can lock the wheel through a wheel mount or use a special spline lock. Use a socket and a long lever to pry the nut out of place. Once unscrewed, remove the nut, washer and cotter pin (if used).
Next, you need to disconnect the caliper from the steering knuckle. Unscrew the two bolts securing the caliper guides, remove it and hang it on a wire to the suspension spring so as not to damage the brake hose. After this, remove the brake disc. Now disconnect the tie rod end by unscrewing the nut and knocking out the pin with a special puller or by gently hitting the end of the lever with a hammer.
The next step is to unscrew the bolts securing the steering knuckle to the lever and shock absorber strut. On Nissan Almera G15 This is usually two bolts on the bottom and one on the top. After unscrewing them, move the shock absorber strut to the side to free the hub. Now you need to knock the old hub out of the bearing. This can be done through a mandrel, hitting the inner ring of the hub with a hammer, or using a hydraulic press.
⚠️ Attention: When knocking the hub out of the bearing, blows must be applied strictly to the inner ring of the hub. If you hit the outer ring of the bearing, you will damage the cage and rollers, and the part will become unusable even if you plan to continue using it.
After removing the hub, all that remains is to remove the bearing itself from the steering knuckle. This is the most difficult part of the job, since the bearing fits very tightly. If you have a puller, use it to press it out. In a garage, you can carefully pry the bearing with a pry bar or knock it out through a pipe of a suitable diameter, leaning on the inner ring so as not to damage the knuckle housing.
- Hydraulic press
- Puller
- Installation
- Chisel and hammer
☑️ Dismantling the hub
New bearing installation and assembly
Before installing a new element, it is necessary to thoroughly clean the seat in the steering knuckle from rust, dirt and old lubricant residues. Use a wire brush and sandpaper to get the surface perfectly smooth. Any unevenness or grain of sand can lead to rapid destruction of the new bearing and the appearance of vibration. Check that there are no burrs on the landing belt.
Installing a new wheel bearing must be done strictly under a press or using a special puller. Do not hammer the bearing directly, as this will destroy the internal structure. The emphasis should only be on the outer ring of the bearing when pressed into the fist. If you are using a hydraulic press, make sure the installation is perpendicular so that the part fits in smoothly.
After installing the bearing into the knuckle, you need to insert the new hub into the inner race of the bearing. A press or puller is also used for this. It is important that the hub fits in all the way and that there are no gaps. Make sure that the hub splines line up with the holes in the axle shaft and that it rotates freely without binding.
Assembly is carried out in reverse order. Reinstall the steering knuckle and tighten the bolts to the arm and strut. Do not forget about the tightening torque, which for the steering knuckle bolts is about 100-120 Nm. Install the steering end and secure it with a nut, being sure to secure it with a cotter pin.
The brake disc and caliper are installed in place. The hub nut is tightened with a huge torque, which for Nissan Almera G15 usually 190-250 Nm (check in the service book for a specific modification). This is a critical step: under-tightening will cause play, while over-tightening can distort the bearing.
⚠️ Attention: After tightening the hub nut, be sure to install a new lock washer and tighten it. If the cotter pin does not fit into the hole, do not forcefully stretch it - replace it with a new one or select the appropriate size.
Hub nut torque is a critical safety parameter. Insufficient tightening will lead to play and destruction of the unit, and excessive tightening will lead to bearing deformation and overheating.
Technical nuances and common errors
One of the most common mistakes when replacing is ignoring the condition of the ABS sensor. On Nissan Almera G15 the sensor is often integrated into or mounted next to the hub assembly. When removing an old bearing, the sensor can be easily damaged, especially if it has a long wire that can get tangled in tools. When purchasing a new spare part, be sure to check the integrity of the sensor wiring.
Another important point is the condition of the anthers. If the shock absorber strut or steering wheel boot is damaged, it must be replaced, otherwise dirt will get into the new joints. It is also worth checking the condition of the silent blocks of the levers, since play in them can simulate a malfunction of the hub or accelerate its wear. A comprehensive check of the suspension before assembly will save you time on repeated repairs.
Sometimes during assembly difficulties arise with the alignment of the hub and axle shaft splines. Do not try to solve this problem by hitting the end of the axle shaft with a hammer, as this may damage the splines or transmission seal. Use a pry bar or special tool to carefully tighten the elements. If the axle shaft does not move, check whether the steering knuckle is warped during installation.
| element | Tightening torque (Nm) | Features |
|---|---|---|
| Hub nut | 190–250 | Requires a torque wrench |
| Knuckle bolts | 100–120 | Tighten in two planes |
| Steering end | 40–50 | Mandatory cotter pin |
| Caliper bolts | 30–40 | Checking the condition of the guides |
| Wheel bolts | 110–120 | Tighten crosswise |
⚠️ Caution: If you cannot insert the cotter pin after tightening the hub nut, do not attempt to drill a new hole in the bolt or stretch the cotter pin. This violates the security design. Replace the nut or cotter pin with a new one of the correct size.
Attempts to disassemble it, wash it and lubricate it with oil or lithol make no sense and are even harmful, since the factory lubricant has a specific composition and viscosity that ensures operation at high speeds. Replacement should only be done when assembled with a new part; the old unit cannot be restored.
Checking work after repair
After all work is completed and the wheel is installed, a test drive should be carried out. Start by driving slowly, listening for sounds from the suspension. If there is no noise, try driving a few turns in both directions to make sure the noise does not return under load. When installed correctly, the wheel should rotate freely and quietly.
Be sure to check the operation of the ABS system. There should be no brake warning message on the dashboard. If the light is on, the ABS sensor may be damaged or not connected correctly. In this case, diagnostics with a scanner will be required to read error codes and, if necessary, replacement of the sensor.
It is also worth checking the wheel alignment. Any work associated with unscrewing the steering knuckle and steering rods disrupts the wheel alignment angles. Neglecting this step will cause the tires to wear quickly and unevenly, as well as cause the vehicle to pull to the side when driving in a straight line. A visit to the wheel alignment stand is a mandatory final part of the repair.
Why is the new bearing humming?
Sometimes a new bearing may make a low noise immediately after installation. This may be due to the fact that the factory lubricant has not yet been distributed evenly. Usually after 50-100 km the sound disappears. If the hum is loud and increasing, the part may be defective or installed crookedly.
Before starting work, take a photo of the position of all bolts and cotter pins with your phone. This will help you assemble the assembly correctly if you forget exactly how the lock washer was positioned or which direction the cotter pin was bent.
Regularly checking the condition of your wheel bearings helps you avoid costly repairs. If you notice the slightest signs of malfunction, do not delay a visit to service or replacement yourself. Road safety depends on the health of each suspension element, and Nissan Almera G15 is no exception. High-quality spare parts and compliance with installation technology are the key to the longevity of your car.
How can you tell which bearing is humming (left or right)?
The easiest way is to change the direction of rotation. If the noise increases when turning right, it means the left bearing is humming (the load is placed on it). If the noise increases when turning left, then the problem is in the right bearing. You can also rock the wheel with your hands on a lift: the play will be felt in the faulty hub.
Is it possible to replace just the inner race of the bearing?
Theoretically it is possible, but it is highly not recommended. This requires a special tool and high precision. In practice, it is easier and cheaper to replace the hub assembly or the entire bearing itself. An attempt to replace only the ring often leads to rapid repeated failure due to a violation of the geometry.
Do I need to do a wheel alignment after replacement?
Yes, definitely. When replacing the wheel bearing, you unscrew the steering knuckle bolts, which throws off the factory wheel alignment settings. Without wheel alignment correction, the tires will begin to wear out quickly and unevenly, and the steering wheel may not be level when driving in a straight line.
How long does it take to replace one bearing?
An experienced technician spends about 1.5–2 hours replacing one wheel bearing. In a garage without a special press and pullers, this process can take from 3 to 5 hours, especially if the parts are stuck and require additional processing.