Rear hub on Nissan X-Trail T31 is a critical component ensuring smooth operation and traffic safety. Over time, the ball elements inside the bearing wear out, which leads to the appearance of a characteristic hum, which intensifies as speed increases. Ignoring this problem can result in a complete jamming of the wheel or even destruction of the hub while driving, which will create an emergency situation on the road.
Timely diagnosis and hub bearing replacement will avoid costly suspension repairs in the future. Unlike the front wheels, where the bearing is often replaced along with the hub assembly, on the rear axle Nissan Qashqai And X-Trail (platform models) the design allows replacement without replacing the entire assembly, if you have the necessary tools.
The work requires certain training and the availability of specialized equipment, since the bearing seats have very tight tolerances. A regular garage set of keys will not be sufficient here, especially for pressing out the old element and pressing in the new one.
Diagnosis of faults and selection of suitable spare parts
The first sign that rear wheel bearing has become unusable, there is a low-frequency hum that changes depending on the turn of the steering wheel. If the noise increases when turning left, then the problem is in the right wheel, since the load is transferred to the outer side, and vice versa. However, on Nissan X-Trail T31 With all-wheel drive, the sound may be more difficult to localize due to the operation of the rear axle coupling.
In addition to the sound, pay attention to the wheel play. Raise the car on a jack, rock the wheel with your hands in a vertical plane (at 12 and 6 o'clock). If you feel a knocking or play associated specifically with the hub, and not with the stabilizer link, then replacement is inevitable. Also check the condition of the brake rotor for runout, as this may mask symptoms.
When choosing a spare part, it is critical not to make a mistake with the part number, since there are different modifications of the rear suspension depending on the year of manufacture and type of drive. For Nissan X-Trail T31 the most commonly used production bearing SKF, Koyo or Timken. The original number changes often, so it is better to focus on high-quality analogues.
- 🔍 Original: The number may vary, for example, 40202-ED00A or 40202-ED00B, check by VIN code.
- 🛠️ Analogues: SKF VKBA 6627, Koyo R15550, GMB GHB-501.
- ⚙️ Completeness: Some kits already include a hub, making assembly easier but more expensive.
⚠️ Attention: Do not skimp on the quality of the bearing! Cheap Chinese copies often have incorrect ring geometry, which leads to rapid overheating and destruction after 5000 km.
Necessary tools and preparatory work
To carry out the work, you will need a lift or inspection hole, since access to the rear beam must be free. Be sure to prepare a jack and reliable stands to secure the car body. Working with a car that is only on a jack is strictly prohibited for safety reasons.
The most difficult moment is pressing and pressing. You will need hydraulic press or a specialized puller for wheel bearings. The use of a hammer and chisel is strictly not recommended, as this will deform the seat in the steering knuckle, and the new bearing will not fit all the way, which will lead to its rapid failure.
Also, do not forget about a torque wrench, since tightening the hub and bearing bolts requires strict adherence to the torque. Standard torque for hub bolts is Nissan T31 is about 100-110 Nm, but it is better to check the official documentation.
☑️ Preparing to replace the bearing
Remove the wheel and dismantle the caliper, hanging it on a wire so as not to damage the brake hose. Then unscrew the brake disc guides and remove it. If the disc is stuck, use special pullers or gently tap the inside of the disc with a hammer (not the working surfaces).
- 🔧 Keys: Spanners for 10, 12, 14, 17, 19, 21, 24 mm.
- 🛑 Pullers: Retaining ring remover, ball joint remover (optional).
- ⚙️ Lubrication: Lithium bearing grease (do not use graphite or copper).
Before starting work, be sure to disconnect the battery, since when removing the caliper you may accidentally short-circuit the ABS sensor, which will cause an error in the system.
⚠️ Attention: ABS sensor on Nissan X-Trail T31 very fragile. When removing the hub, proceed with extreme caution so as not to damage the wiring and the sensor itself.
- Every maintenance (once a year)
- Once every 2 years
- Only when something is broken
- I don't know when it was last changed
Removing the old hub and bearing
After removing the brake disc, you will see the hub assembly. You need to unscrew the bolts securing the hub to the steering knuckle. Usually there are four of them, they are located in a circle. If the bolts are stuck, use penetrating lubricant and heat.
The next step is to remove the ABS sensor. It is attached to the rear of the steering knuckle. Carefully disconnect the chip and unscrew the fastening bolt. Remove the sensor from the mounting hole, being careful not to bend its sensitive tip.
Now you can remove the hub itself. If it doesn't come off, try gently prying it off with a pry bar, but don't use excessive force. After removing the hub, you will be left with a steering knuckle with an internal bearing in your hands.
To press out the old bearing you will need a press. Place the steering knuckle on the support so that the bearing is free. Use a mandrel that rests on the outer race of the bearing to avoid damaging the inner race. Press the bearing out.
- 🛑 Important: Do not press on the inner race when the bearing is pressed out, otherwise it may collapse and jam the tool.
- 🔨 Tool: Use only steel mandrels of the correct diameter.
- 🧼 Cleaning: Thoroughly clean the seat in the steering knuckle of rust and old grease.
If there is a retaining ring in the steering knuckle that holds the bearing in place, it must be removed. Use pliers or a special circlip puller to carefully remove it.
What to do if the hub cannot be removed?
Often the hub gets stuck to the axle shaft. In this case, you can try to heat the hub with a hair dryer or a blowtorch (carefully!), and then sharply hit it through the spacer. If this does not help, you will have to cut off the hub with a grinder, but this is an extreme measure and requires replacing the axle shaft.
Installing a new bearing and assembling the unit
Before installing a new bearing, make sure that the seat in the steering knuckle is perfectly clean and smooth. Any scratch or piece of dirt can cause rapid wear. Apply a thin layer of grease to the outer race of the bearing.
Pressing in a new bearing is done in the same way as pressing out, but in the reverse order. Support the mandrel on the outer race of the bearing and press slowly with a press until the bearing rests against the retaining ring or until it stops. Check for distortions visually.
After pressing, insert the retaining ring into place. It should fit snugly in the groove. Make sure the ring is not damaged and is the correct thickness. If the ring is worn, the new bearing may spin in its seat.
Now you need to install the hub into the new bearing. This is the most critical moment, since the inner ring of the bearing has very tight tolerances. The hub must be pressed into the bearing, resting the mandrel on the inner ring of the bearing.
After pressing the hub into the bearing, assemble the assembly: install the retaining ring (if it is provided for in the design), put on the ABS sensor and secure it. Make sure the sensor rotates freely and does not touch any rotating parts.
Before final tightening of the hub bolts, check that the hub rotates smoothly, without jamming or abnormal sounds.
- 🔩 Tightening: Tighten the hub mounting bolts crosswise.
- ⚙️ Moment: Observe the factory tightening torque (usually 100-110 Nm).
- 🔒 Control: Check that the ABS sensor is connected and has no play.
Final assembly and performance check
Reinstall the brake disc and secure it with guides. Make sure the disc sits straight and has no runout. Then slide the caliper onto the disc, connect the brake pads and secure the caliper with bolts.
After installing the wheel, you need to bleed the brake system, if you touched it. Press the brake pedal several times until the pads are in place. Check the brake fluid level in the reservoir.
Test drive at low speed before heading out on the road. Listen to the suspension work. If there is no hum and the steering wheel does not pull to the side, it means the job was completed successfully. If the noise remains, the problem may be in another unit or the bearing is installed poorly.
Check the wheel alignment angles on a specialized stand.
Correct pressing of the bearing is the key to its long service life. Any distortions or impacts during installation are guaranteed to lead to repeated repairs in a short time.
| Parameter | Value for Nissan X-Trail T31 |
|---|---|
| Bearing type | Ball, angular contact |
| Hub diameter | 43.0 mm (approximately, depends on modification) |
| Hub tightening torque | 100-110 Nm |
| Wheel bolt tightening torque | 100-110 Nm |
| Recommended Brand | SKF, Koyo, Timken, NSK |
Design features and common mistakes
One of the common mistakes when replacing is incorrect operation of the ABS sensor. On Nissan X-Trail T31 The sensor has a magnetic tip that is very sensitive to shock. If you drop or hit the sensor, it may fail and the ABS fault light will come on.
Another problem is the use of old mounting bolts. The hub bolts are sheared and stretched, so after unscrewing, it is better to replace them with new ones. Reusing old bolts may cause them to break while driving.
Some craftsmen try to save time and do not clean the seat. This is a big mistake. Rust and dirt will not allow the bearing to seat all the way, which will lead to its rotation in the seat and rapid destruction.
If you are using a hydraulic press, make sure that the force is applied strictly along the axis. Even a few degrees of misalignment can damage the bearing inner race or steering knuckle.
⚠️ Attention: Never use a hammer to press a bearing! This will lead to microcracks in the metal, which will appear after several thousand kilometers.
After installing the new unit, be sure to check the gap between the ABS sensor and the hub. It should be uniform throughout the circle. If the gap is too large or small, the ABS system may not work properly.
- 🔧 Check: Use a feeler gauge to measure the sensor gap.
- 🛠️ Setting: If necessary, adjust the position of the sensor.
- 🚗 Test: Run a computer diagnostic to clear ABS errors.
FAQ: Frequently asked questions
Is it possible to replace a bearing without a press?
Theoretically, you can use special pullers for pressing out, but without a press the risk of damaging the steering knuckle or the bearing itself is extremely high. For quality work, a press is necessary.
How do you know when a bearing needs to be replaced?
The main symptom is a hum that gets worse when turning. Wheel play and steering wheel vibration may also occur at high speed.
Do the bearings need to be replaced on both sides?
Not necessarily, but if the car has a lot of mileage, then the second bearing may be on the verge of wear. It is better to check its condition and, if necessary, replace it immediately.
How long does it take to replace?
An experienced master will spend about 1.5-2 hours on one side. A beginner may need 3-4 hours due to the need to find a tool and study the design.
What happens if a worn bearing is not replaced?
The bearing may completely fail, causing the wheel to seize, the hub to collapse, and loss of vehicle control.