Replacing an axle bearing on a Nissan Navara: signs of wear and step-by-step repairs

Axle bearing in Nissan Navara - a critically important unit, the condition of which determines not only ride comfort, but also safety. The wear of this element is manifested by a characteristic hum, vibration and even wheel jamming, which is especially dangerous at high speeds. Unlike many other chassis parts, the axle bearing cannot be restored - it can only be replaced.

In this article we will look at how to determine whether a bearing is faulty Navara D40 And NP300, what tools are needed for replacement, and we will give step-by-step instructions, taking into account typical mistakes. We will pay special attention to the nuances of dismantling stuck parts and correctly pressing in a new bearing - these points often become the reason for repeated repairs.

Signs of a bad axle bearing

The first symptoms of axle bearing wear on Nissan Navara appear long before the critical condition. The main thing is not to confuse them with malfunctions of wheel bearings or CV joints. Main features:

• 🔊 Hum or howl from the rear wheel, increasing during acceleration. In the early stages the noise may disappear when cornering, but the later becomes constant.
• 🌀 Vibration on the steering wheel or body when driving at speeds above 60 km/h. Often accompanied by a feeling of “beating” in the gas pedal.
• 🔥 Local overheating hubs or axle shafts after a trip. Touching the part may cause a burn - this is a sure sign of bearing failure.
• 🚗 Uneven tire wear on the rear axle. It appears as a “sawtooth” tread pattern on one side of the wheel.

On Navara D40 with all-wheel drive (4WD) wear of the axle bearing can be disguised as a malfunction of the transfer case. To rule out an error, check the oil level in the rear axle gearbox - if it is clean and without metal shavings, the problem is definitely in the bearing.

⚠️ Attention: If while driving there is crunching or clicking sounds when turning the steering wheel - this is a sign of destruction of the bearing cage. In this case, further operation Navara prohibited: the wheel may jam!

For an accurate diagnosis, jack up the rear of the car and check the wheel play in the horizontal plane. If the play exceeds 0.5 mm, the bearing must be replaced. On NP300 With an independent rear suspension, the play may be less noticeable - in this case, focus on noise and vibration.

What tools and spare parts will be needed

Replacing the axle bearing with Nissan Navara requires a specific tool. Without it, the risk of damaging parts or under-pressuring the bearing increases significantly. Here's the full list:

Category	Name	Note
Tool	Bearing puller (3-jaw)	Diameter 80–100 mm, with force up to 20 tons
Tool	32mm socket	For the axle nut (on D40 30 mm may be required)
Tool	Torque wrench	Axle nut tightening torque: 180–220 Nm
Spare parts	Axle bearing	Original Nissan 40520-ED00A or analogues: NTN, KOYO, SKF
Consumables	Lubrication Molykote BR2 Plus	For machining seating surfaces and splines

On Navara NP300 (since 2015) the axle bearing has a different catalog number - 40520-4M00A. Make sure you buy the part specifically for your modification! Also prepare:

• 🔧 Set of open-end wrenches (10–24 mm)
• 🔨 Hammer with copper head
• 📏 Vernier calipers (to check the runout of the axle shaft)
• 🧴 Degreaser (WD-40 or equivalent)

⚠️ Attention: Do not use bearings from unknown brands! On Navara with a full load, cheap analogues fail after 10–15 thousand km. Original NTN or KOYO last 3–4 times longer.

If the axle shaft is heavily corroded, you may need a grinder to carefully cut off the nut. In this case, prepare a new nut in advance (Nissan 40310-ED000) - reuse of a deformed nut is unacceptable.

Step-by-step instructions for replacing a bearing

The process of replacing the axle bearing Nissan Navara takes 3–5 hours depending on the condition of the threaded connections. It is better to carry out work on a lift or inspection pit. If they are not there, use a jack with stops under the frame (Never work on one jack!).

Algorithm of actions:

1. Removing the wheel and brake drum
   • Loosen the wheel nuts, jack up the vehicle and remove the wheel.
   • Unscrew the brake drum guide pins (if equipped) and hammer the drum through the wooden spacer.
   • On NP300 With disc brakes at the rear, removing the caliper is mandatory!
2. Removing the axle shaft
   • Unscrew the axle nut with a 32mm socket (you will need an extension and lever).
   • Remove the lock washer and press the axle shaft out of the hub. If it does not come out, use a puller or gently tap with a hammer.
3. Bearing replacement
   • Clamp the axle shaft in a vice and remove the old bearing with a puller. On Navara D40 The inner ring of the bearing often remains on the axle shaft - it needs to be sawed off with a grinder or cut off with a chisel.
   • Clean the seat from rust and apply a thin layer of lubricant Molykote BR2 Plus.
   • Press on the new bearing using a mandrel (you can use the old bearing as a spacer). The force must only be applied to the outer ring!

Check the integrity of the axle boot|Apply grease to the splines|Make sure the snap ring is in place|Tighten the axle nut with a torque wrench-->

When pressing the bearing, make sure that it sits evenly - misalignment will lead to premature wear. After installation, check the axle shaft play manually: if it is absent and the rotation is smooth, you can proceed with assembly.

Common mistakes and how to avoid them

Even experienced craftsmen make mistakes when replacing an axle bearing with Nissan Navara. Here are the most common of them and ways to prevent them:

• 🔧 Axle nut retightening — leads to bearing destruction within 1–2 thousand km. Always use a torque wrench (torque for D40 — 180 Nm, for NP300 - 200 Nm).
• 🛠️ Using a hammer to press in — impacts on the bearing deform the raceways. Press or puller only!
• 🔥 Ignoring corrosion on the axle shaft — rust under the bearing accelerates its wear. Be sure to clean the seat to a metallic shine.
• 🚗 Failure to check axle runout - if the axle is bent (runout more than 0.3 mm), the new bearing will not last long. Check with a caliper!

Another common problem is incomplete removal of the old bearing. On Navara the inner ring often remains on the axle shaft and interferes with the installation of a new bearing. To remove it:

1. File the ring with a grinder in one place.
2. Gently split with a chisel.
3. Clean the seat with sandpaper.

What happens if the bearing is not replaced on time?

If the bearing is completely destroyed, the axle shaft may jam, which will lead to the wheel locking at speed. On Navara with all-wheel drive, this also threatens damage to the rear axle differential (repairs will cost 50–80 thousand rubles).

On vehicles with LSD (limited slip) ignoring bearing noise can lead to overheating of the differential and failure of the entire rear gear. The cost of repairs in this case exceeds 100 thousand rubles.

Comparison of original and analog bearings

The choice between the original bearing and analogues is a key point affecting the service life of the unit. On Nissan Navara Japanese brand bearings are installed NTN And KOYO, but there are cheaper alternatives on the market. Let's compare them:

Parameter	Original Nissan 40520-ED00A	NTN or KOYO	Budget analogues (FAG, SNL)
Average resource, thousand km	150–200	120–180	30–80
Load resistance	High (suitable for off-road)	Medium (not recommended for towing)	Low (risk of destruction if overloaded)
Price, rub.	4 500–6 000	3 000–4 500	1 200–2 500
Warranty	12–24 months	12 months	3–6 months

On Navara NP300 with independent rear suspension (Multi-Link) the load on the bearings is higher, so saving on spare parts is unjustified. Original parts or NTN with markings Japan - the only option for durability.

If you still choose an analogue, pay attention to:

• 📦 Packaging — original bearings are supplied in branded boxes with a hologram.
• 🔍 Marking - there should be a stamp on the end NTN or KOYO with serial number.
• 🛒 Place of purchase — avoid markets and unverified online stores. It’s better to buy from official dealerships or trusted suppliers (Exist.ru, Autodoc).

When to call for service and when to handle it yourself

Replacing the axle bearing with Nissan Navara - a task of average complexity, but there are situations when you cannot do without the service. Assess your strengths according to the following criteria:

Criterion	You can do it yourself	It's better to contact the service
Chassis repair experience	Do you have experience replacing wheel bearings or CV joints?	Never worked with suspension
Tool	Includes bearing puller and torque wrench	No specialized tool
Axle condition	Threads and splines are in good condition	Severe corrosion, cut edges on nut
Modification Navara	D40 with drum brakes	NP300 with disc brakes and LSD

If you decide to contact the service, choose specialized repair centers Nissan. The cost of replacing an axle bearing in Moscow and the regions:

• 🏙️ Moscow/St. Petersburg: 6,000–9,000 rub. (for one wheel).
• 🏘️ Regions: 4,000–6,000 rub.
• 🔧 Official dealer: 10,000–15,000 rub. (but with a 12 month guarantee).

You can save money if you buy spare parts yourself and only call for work. The main thing is to make sure that the service has experience working with Navara, since the design of the rear axle for this model has nuances (for example, fixing the axle shaft with a locking ring on NP300).

Prevention: how to extend the life of an axle bearing

Axle shaft bearing life at Nissan Navara depends not only on the quality of the part, but also on the operating conditions. By following simple recommendations, you can increase its service life by 1.5–2 times:

• 🚿 Rear axle washing — after off-roading, clean the axle shaft from dirt and sand that gets under the boot and destroys the bearing.
• 🔧 Checking the backlash — every 20 thousand km, jack up the rear wheel and check the play in the horizontal plane.
• 🛢️ Gearbox oil control - on Navara 4WD The oil in the rear axle needs to be changed every 60 thousand km (use Nissan Differential Gear Oil 80W-90).
• 🚛 Load limit - avoid constant overload (maximum trailer weight for D40 — 3.5 t, for NP300 - 3.3 t).

On Navara with all-wheel drive (4WD) axle bearings wear out faster due to the constant load on the rear axle. If you often drive off-road, reduce the inspection interval to 15 thousand km.

Another important point - correct running-in after replacing the bearing. Avoid the first 500 km:

• Sudden starts and braking.
• Driving through deep puddles (risk of water getting under the boot).
• Towing trailers or overloading.

If any abnormal noise occurs after replacement, stop immediately and check:

1. Tighten the axle nut (it could have become loose).
2. The integrity of the boot (perhaps it was torn during installation).
3. No bearing misalignment (the wheel should rotate without force).

FAQ: Frequently asked questions about replacing axle bearings

Is it possible to drive with a humming axle bearing?

It’s possible for a short time (1-2 days), but it’s not worth the risk. On Navara Bearing failure often leads to wheel seizure. If the hum appears suddenly, reduce the speed to 60 km/h and contact service.

Which bearing is better - original or NTN?

Original bearing (Nissan 40520-ED00A) is produced by the same NTN, but undergoes additional quality control. There is no difference in resource, but the original has better packaging and a warranty from the dealer.

Do I need to change the axle shaft seal when replacing the bearing?

Definitely! Oil seal (Nissan 40516-ED000) is inexpensive (about 500 rubles), but its wear leads to oil getting on the brake pads. On NP300 The oil seal is integrated into the boot - replace it as a set.

Is it possible to replace a bearing without a puller?

Theoretically, yes, but the risk of damaging the axle shaft or new bearing is extremely high. Without a puller, pressing will be uneven, which will reduce the life of the part by 2–3 times. An alternative is to use a press in a car service center (costs 500–1000 rubles).

Why did the hum remain after replacing the bearing?

The reasons may be the following:

1. The axle nut is not tightened enough (check the torque with a torque wrench).
2. The oil seal or boot is damaged (disassemble and inspect).
3. The bearing is defective (this happens with cheap analogues).
4. The rear axle gearbox is worn out (needs diagnostics).