Rear wheel bearing on Ε KODA Octavia A5 One of those nodes that often fails after 100-150 thousand. mileage, especially if the car is operated in conditions of Russian roads. Unlike front bearings, the rear bearings last longer, but their replacement requires more time and special tools. If you heard me. a deaf hum or crunch from the rear wheel, intensifying at a speed of 60-90 km / hThis is a sure sign that the bearing requires diagnosis.
In this article we will analyze not only the symptoms of malfunction, but also the nuances of the choice of spare parts (original vs analogues), step-by-step instructions for replacing with photos and videos, as well as typical mistakes that car owners make during repairs. We will focus on the specifics separately. Octavia A5 with engines 1.6 MPI, 1.8 TSI and 2.0 TDI - they have different loads on the rear axle, which affects the life of the bearings.
Signs of a bad rear wheel bearing
The first sign of a problem is extraneous noise from the rear wheel area. Early on, it can be a barely noticeable hum that many blame on tyres or an imbalance. However, over time, the sound becomes louder and acquires a metallic hue. Here are the key symptoms:
- π Hum or howl at a speed of 60-90 km / h, which disappears when turning (for example, when turning to the left, the noise on the right increases - this is a sign of wear on the right bearing).
- π Vibration on the steering wheel or body, especially when accelerating or braking.
- π§ Wheel play, which can be checked by doomscripting the car and swaying the wheel in a vertical plane.
- π₯ Hub overheating After the trip (do not touch with your bare hands!).
On Octavia A5 with rear multilink suspension wear bearing is often accompanied by uneven tire wear. If you notice that the inside or outside of the tread is washing away faster, this may be an indirect sign of a problem with the hub. It is also worth paying attention to ABS: In critical bearing wear, the sensor may produce false positives or an error on the dashboard.
β οΈ Attention: If the bearing "jams" on the move, the wheel will lock, which will lead to loss of control. This is especially dangerous at high speed. Do not delay repairs if you hear a crunch or grinding β this is a sign that the bearing is already crumbled.
- Never changed
- Changed 1-2 years ago
- Replaced more than 3 years ago
- I change myself regularly.
What bearings are on the Octavia A5 from the factory and which analogues to choose
On Ε KODA Octavia A5 (including restyled versions) are installed double row sealed ball bearings sensory ABS. Supplies original spare parts VAG under the article 1K0 598 625 (for most modifications). However, the price of the original is steep - from 8 to 12 thousand rubles per piece. Therefore, many choose analogues from trusted brands.
| Brand | Article | Price (for 1 piece), rub. | Features |
|---|---|---|---|
| SKF | VKBA 3603 |
5 500β7 000 | High quality, often installed on assembly line VW Group. |
| FAG | 713 6106 20 |
6 000β7 500 | Reinforced design, suitable for harsh operating conditions. |
| NTN-SNR | R155.78 |
4 800β6 200 | Good price/quality ratio, but there are fakes. |
| Febi Bilstein | 22625 |
4 500β5 800 | Budget option, but the resource is lower than that SKF or FAG. |
When choosing an analogue, pay attention to the availability ABS sensor β some cheap bearings come without it, which will lead to an error on the instrument panel. Also check the contents: the box should contain retaining ring and oil seal (if you don't have them, you'll have to buy them separately). For Octavia A5 with all-wheel drive (4x4) the bearings are different - their article number 1K0 598 625 A.
Before purchasing, check the bearing for play manually: grab it by the outer ring and rock it. If there is even the slightest gap, itβs a marriage. Also inspect the seals: they should be intact and without cracks.
Step-by-step instructions for replacing the rear wheel bearing
Replacing the rear bearing with Octavia A5 more difficult than the front one due to the suspension design. You will need:
- π§ Special puller for wheel bearings (eg Hazet 4982-1).
- π¨ Socket heads at 13, 16, 17 and 19 mm.
- π₯ Gas burner or a hair dryer (to heat the hub).
- π οΈ Torque wrench (tightening torque of the hub nut - 120 Nm).
If you don't have a puller, you can get by hammer and mandrel, but this is risky - you can damage the new part. Also prepare new hub nut (it's disposable!) and brake fluid (it will have to be bled after removing the caliper).
βοΈ Preparing to replace a bearing
Step 1: Removing the hub. After removing the brake disc, unscrew the bolts securing the hub to the steering knuckle (usually 4 bolts of 16 mm). Then use a puller to press out the hub. If it gets stuck, heat it with a torch - this will help avoid damaging the thread.
Step 2: Replace the bearing. The old bearing is pressed out with a puller or knocked out through a mandrel (impacts are applied only to the outer ring!). The new bearing is installed using grease fittings or a vice. Important: do not heat the bearing with an open flame - this destroys the lubricant. It is better to use an induction heater or oil.
β οΈ Attention: When installing a new bearing, do not mix up the sides! Sensor ABS should be directed towards the cabin. Also, do not forget to install the retaining ring - without it, the bearing will quickly fail.
Step 3: Assembly. After installing the bearing, press the hub back in, tighten the fastening bolts (torque 80 Nm) and install the brake disc with caliper. Tighten the hub nut only after the machine is lowered to the ground to ensure proper bearing alignment.
What to do if there is still play after replacement?
If the play does not disappear after replacing the bearing, check: 1) Correct installation of the retaining ring; 2) The condition of the seat in the steering knuckle (it may be deformed); 3) Tighten the hub nut (it must be new!).
Typical replacement mistakes and how to avoid them
Even experienced craftsmen sometimes make mistakes that shorten the service life of a new bearing. Here are the most common:
- π§ Using an old hub nut. It deforms when tightened and does not provide the required torque. Always take a new one!
- π₯ Bearing overheating during installation. If you heat it with a burner for more than 30 seconds, the lubricant loses its properties.
- π οΈ Incorrect pressing. Hitting the inner ring with a hammer leads to microcracks.
- π Ignoring the ABS sensor check. After replacement, be sure to reset the errors with the scanner (for example, VCDS).
Another common problem is mismatch of seats for analog bearings. For example, cheap Chinese parts may have a smaller diameter of the outer ring, which is why they βwalkβ in the socket. Always check the catalogs ETKA or Elcats before purchasing.
The most critical mistake is saving on the puller. Without it, you risk damaging the steering knuckle, which will result in expensive suspension repairs.
How much does a replacement service cost and is it possible to save money?
Rear wheel bearing replacement cost Octavia A5 in service depends on the region and level of the service station:
- ποΈ Moscow/St. Petersburg: 5,000β8,000 rub. for one wheel (with spare parts - 12,000β18,000 rubles).
- ποΈ Regions: 3,000β5,000 rub. for work (with spare parts - 8,000β12,000 rubles).
- π§ Garage technicians: 2,000β3,500 rubles, but the risk of poor-quality repairs is higher.
If you decide to change it yourself, the budget will be:
- Bearing SKF or FAG β 6,000 rub.
- Hub nut - 200 rub.
- Lubrication
Molykoteβ 500 rub. - Puller (if purchased) - 1,500β3,000 rubles.
Total: 8,000β10,000 rub. for one wheel. If bearings are replaced in pairs (which is recommended), multiply the amount by 2. Savings compared to service - up to 50%. However, keep in mind that without experience, replacement will take 4β6 hours.
How to extend bearing life: advice from experts
Rear bearing life Octavia A5 depends not only on the quality of the part, but also on driving style and care. Here's what the experts recommend:
- πΏ Wash your wheels in winter. Salt and reagents corrode bearing seals, which leads to moisture ingress and corrosion.
- π£οΈ Avoid potholes at speed. Impacts to the suspension reduce the bearing life by 2β3 times.
- π§ Check the play every 20 thousand km. Early diagnosis will help avoid critical wear.
- π₯ Do not overload the machine. Octavia A5 not designed for constant overload - this increases the load on the hubs.
If you do a lot of off-road driving or carry heavy loads, consider installing reinforced bearings from FAG or NTN-SNR with markings Heavy Duty. They are 20β30% more expensive, but last 1.5β2 times longer than standard ones.
After replacing the bearing, avoid sudden acceleration and braking for the first 100 km - this will help the new lubricant to be evenly distributed.
Frequently asked questions about Octavia A5 rear bearings
Is it possible to drive with a humming bearing?
If the hum has just appeared and is not accompanied by a crunching or vibration, you can drive to the service station (no more than 500β1000 km). But if you can hear grinding or metallic knocking noise, movement is dangerous - the bearing may jam.
Do I need to replace bearings in pairs?
Only necessary if the second wheel also shows signs of wear. However, if the mileage is more than 150 thousand km, it is better to change both - the second bearing will soon fail.
Which bearing is better - original or SKF?
SKF often supplies bearings to the conveyor VW Group, so they are not inferior in quality to the original, but are 30β40% cheaper. The main thing is to buy from trusted suppliers to avoid counterfeits.
Is it possible to lubricate a bearing without replacing it?
Theoretically it is possible, but in practice this is a temporary measure. Bearing on Octavia A5 non-separable, and lubricant will not eliminate wear on the raceways. Maximum - will extend life by 5-10 thousand km.
What happens if the bearing is not replaced on time?
In case of critical wear, it will collapse, which will lead to:
- Wheel jamming while driving (emergency situation!).
- Damage to the steering knuckle (repair will cost 15β20 thousand rubles).
- Breakage of the ABS sensor and failure of the brake system.