Nissan Almera - one of the most popular foreign cars on the Russian market, especially in generations N16 (2000–2006), N17 (2006–2012) And G15 (2012–2019). Despite the simplicity of the design, even such an “unpretentious” unit as a bypass belt can become a source of serious problems if you do not pay attention to its condition in time. This element, it would seem, performs a secondary function - it transmits torque from the crankshaft to auxiliary units (generator, power steering, air conditioning), but its breakage or slippage leads to loss of battery charge, engine overheating and even pump jamming on some modifications.
In this article we will analyze all the nuances: from signs of wear And replacement frequency to step by step instructions to install a new belt. We will pay special attention original articles, proven analogues and typical mistakes that owners make when replacing them themselves. If you hear a whistle from under the hood or notice cracks on the belt, this information will help you save at the service station and avoid costly repairs.
Functions of the bypass belt in Nissan Almera: why is it important
Bypass (also known as drive or service) belt in Almera is responsible for the operation of engine auxiliary systems. Depending on the configuration and year of manufacture, it can drive:
- 🔋 Generator — without it, the battery will be discharged in 30–60 minutes, and the car’s electronics will turn off.
- 💨 Power steering pump — when the belt breaks, the steering wheel becomes “tight”, especially at low speeds.
- ❄️ Air conditioning compressor — without a drive, climate control stops working.
- 🔥 Coolant pump (on some versions) - stopping it leads to engine overheating.
On Almera N16 with engines QG15DE And QG18DE the belt drives the generator and power steering, and G15 with motor HR16DE — also an air conditioning compressor. Structurally, the belt is a closed ring made of rubber with reinforcing threads (usually polyester or Kevlar). Over time, the material loses its elasticity, cracks appear, and the strength of the threads decreases - this inevitably leads to breakage.
It is important to understand that the bypass belt does not synchronize the operation of valves and pistons (this is the task of the timing belt), but its breakage is still critical. For example, if on Almera G15 if the belt breaks with the air conditioner, then in addition to losing the charge, you risk damaging the compressor bearing - its repair will cost 15–20 thousand rubles.
- QG15DE (1.5 l)
- QG18DE (1.8 l)
- HR16DE (1.6 l)
- Other
Signs of wear: when is it time to change the belt?
The manufacturer recommends checking the condition of the idler belt every 15–20 thousand km, and replacement should be carried out through 60–80 thousand km or every 4–5 years (whichever comes first). However, the actual service life depends on operating conditions: in hot weather, with frequent slipping or oil getting on the belt, it wears out 2-3 times faster.
The following symptoms indicate the need for replacement:
- 🔊 Whistling or squeaking from under the hood when starting the engine or when turning on the air conditioning/power steering. The sound may disappear after warming up - this indicates belt slippage.
- 🔍 Visible cracks or delaminations on the inside or outside of the belt. Even small cracks (1–2 mm deep) are a reason for replacement.
- 📉 Tension sag — the belt sags, it can be easily turned by hand more than 90°.
- 🚨 Extraneous noise from rollers — a hum or knocking noise when the engine is running often means wear on the tension or idler roller.
- ⚡ Charging problems — the battery indicator on the dashboard is on, the voltage is below 13.5 V.
On Almera N16/N17 With a mileage of more than 100 thousand km, belt whistling is often confused with a generator malfunction. To accurately diagnose the problem, it is enough Spray the belt with water from a spray bottle - if the sound temporarily disappears, it is he who is to blame. If the whistle persists, check the roller bearings or alternator.
⚠️ Attention! On Almera G15 with engine HR16DE a broken belt can cause the pump to jam (if it is driven by a belt and not a separate drive). In this case, the engine will overheat in 10–15 minutes, which can lead to cylinder head deformation. Always check the coolant level after replacing the belt!
Original articles and analogues: what to choose
When purchasing a bypass belt for Nissan Almera the main thing is to select the part according to exact catalog number, since the length and profile of the belt depend on the vehicle equipment. Below is a table with original articles and proven analogues:
| Model and engine | Original article | Length (mm) | Analogs (brand + article) |
|---|---|---|---|
| Almera N16 (QG15DE, QG18DE) | 11920-4M000 | 1745 | Gates 6PK1745, Contitech 6PK1745, Dayco 6PK1745 |
| Almera N17 (QG15DE, QG18DE) | 11920-4M010 | 1745 | Bosch 1987949684, SKF VKM 33027 |
| Almera G15 (HR16DE, without air conditioning) | 11920-ED000 | 1875 | Gates 6PK1875, Contitech 6PK1875 |
| Almera G15 (HR16DE, with air conditioning) | 11920-ED010 | 2135 | Dayco 6PK2135, Bosch 1987949700 |
When choosing an analogue, pay attention to belt profile - for Almera used 6PK (6 streams, profile K). Cheap belts without reinforcement (for example, from no-name brands) last 2–3 times less than the original. The optimal choice in terms of price/quality ratio - Gates or Contitech.
In addition to the belt, it is recommended to replace tension roller (if it is in the design). Its articles:
- For N16/N17: original
11950-4M000, analogues - SKF VKM 33028, Gates T42042. - For G15: original
11950-ED000, analogues - NTN 16V1901, Koyo 6202-2RS.
Before buying a belt, measure its length with a tape measure (along the outer contour) - sometimes even original parts from different batches may differ by 5-10 mm. This is critical for tension!
Step-by-step instructions for replacing the bypass belt
Replacing the belt with Nissan Almera does not require special tools, but will require care. It is more convenient to carry out work on pit or overpass, since on some modifications you need to remove the right front wheel. Below are universal instructions for all generations, with clarifications for specific models.
Disconnect the battery (remove the negative terminal)|
Jack up the right front wheel (to access the pulley)|
Prepare keys: 10, 12, 14 mm and a 17 mm head |
Prepare a new belt, roller (if needed) and mounting blade -->
Step 1: Free access to the belt
On Almera N16/N17 remove plastic casing engine (4 clips) and the right front wheel. On G15 Simply unscrew the air filter and move it to the side. For convenience, you can remove alternator belt (if it is separate).
Step 2: Release the belt tension
On most modifications Almera used automatic tensioner with a roller. To loosen the belt:
- Insert the 17 mm socket into the groove of the tension roller.
- Rotate the roller counterclockwise (on G15 - clockwise) until the belt loosens.
- Secure the roller in this position using a spatula or screwdriver.
Step 3: Remove the old belt
Carefully remove the belt from the pulleys, remembering its route (You can take a photo). On Almera G15 with air conditioning, the belt goes through 4-5 pulleys, so it is important not to mix up the order. If the belt is stuck to the pulleys, spray it with WD-40 and wait 5-10 minutes.
Step 4: Install a new belt
Place the belt on the pulleys in reverse order, starting with crankshaft. Make sure it lies in the pulley streams without distortions. After installation, release the tension roller - it will automatically tension the belt. Check the tension: when you press with your finger in the middle between the pulleys, the belt should bend by 8–12 mm.
Step 5. Check and launch
Before starting the engine Turn the crankshaft 2–3 times with a wrench (by the pulley bolt) - this will help the belt “settle” into place. Start the engine and check:
- 🔊 No whistling or extraneous noise.
- ⚡ Stable battery voltage (13.8–14.4 V).
- 💨 Operation of power steering and air conditioning (if any).
⚠️ Attention! On Almera N16 with engine QG18DE When replacing the belt it is easy to damage crankshaft position sensor, which is located next to the pulley. Be careful when using the mounting blade!
If after replacement the belt continues to whistle, check the alignment of the pulleys - the generator or pump bearings may be worn out.
Typical replacement mistakes and how to avoid them
Even experienced car owners make mistakes when replacing the idler belt with Nissan Almera. Here are the most common ones and how to prevent them:
- Incorrect belt tension
Weak tension leads to slipping and whistling, and excessive tension leads to accelerated wear of the belt and roller bearings. On Almera G15 check the tension with a dynamometer (the norm is 80–100 N for a new belt).
- Ignoring cutscenes
If the tensioner or idler pulley is not replaced, its worn bearing will quickly destroy the new belt. On N16/N17 rollers serve ~100 thousand km, for G15 - up to 150 thousand km.
- Mixed up belt route
On Almera with air conditioning, the belt goes through 4-5 pulleys. An error in the routing results in skewed and rapid wear. Always check the diagram (it can be found on a sticker under the hood or in the manual).
- Dirt or oil on the belt
Oil corrodes rubber, and sand acts as an abrasive. Clean the pulleys before installing a new belt.
white spiritand check the tightness of the seals.
Another typical problem is buying the wrong size belt. For example, on Almera G15 with air conditioning, sometimes by mistake a belt is installed with a length of 1875 mm instead of 2135 mm. This leads to the impossibility of proper tension and rapid breakage.
What to do if the belt breaks on the road?
If the bypass belt breaks on the way, and there is no spare one, you can temporarily go to a service station by removing the belt completely. However, please note:
- Without a generator, the battery will be discharged in 30–60 minutes (turn off all consumers: lights, stove, music).
- Without power steering, the steering will be heavy, especially at low speeds.
- You can drive without air conditioning, but do not turn it on so as not to damage the compressor.
Drive at minimum speed (1500–2000 rpm) and monitor the engine temperature!
Replacement cost: service station vs self-repair
Cost of replacing the bypass belt Nissan Almera in the service depends on the region and complexity of the work. Below are the average prices for Russia (as of June 2026):
| Service | STO (rub.) | On your own (RUB) |
|---|---|---|
| Belt replacement (without roller) | 1 200–2 000 | 500–1,500 (cost of belt) |
| Replacing the belt + tension roller | 2 500–3 500 | 1,500–2,500 (belt + roller) |
| Whistle/noise diagnostics | 500–1 000 | Free |
The savings when replacing yourself are obvious, but it is important to consider risks:
- 🔧 Incorrect installation may result in belt breakage after 1–2 thousand km.
- ⚡ Damage to the crankshaft sensor (on N16/N17) will entail additional costs for diagnostics.
- 🕒 Self-replacement takes time 1.5–3 hours (depending on experience), whereas at a service station this is done in 40–60 minutes.
If you have never changed the belt yourself, we recommend that you do it the first time under the supervision of an experienced technician, or at least by looking video instructions for your model Almera.
Frequently asked questions (FAQ)
Is it possible to drive with a whistling belt if it is intact?
Brief driving is possible, but a whistle indicates slippage, which leads to accelerated wear of the belt and pulleys. In addition, slippage reduces the efficiency of the generator - the battery may be discharged. If the whistle only appears in wet weather, try cleaning the belt and pulleys of dirt. If the sound is constant, the belt needs to be replaced.
Which belt is better: original or analogue?
Original belts Nissan (production Gates or Mitsuboshi) last longer, but cost 1.5–2 times more than analogues. If your budget is limited, choose proven brands: Gates, Contitech, Dayco or Bosch. Avoid cheap belts without reinforcement - they stretch after 10-15 thousand km.
Do I need to change the rollers when replacing the belt?
Yes, especially if the car's mileage exceeds 100 thousand km. A worn roller may:
- 🔊 Cause a hum or vibration.
- 🔄 Wear the new belt unevenly.
- 🚨 Get jammed, which will lead to belt breakage.
The cost of the video is 800–1,500 rubles, which is not commensurate with the risks.
What happens if the bypass belt breaks while driving?
The consequences depend on the configuration:
- 🔋 The generator will turn off - the battery will run out and the engine will stall.
- 💨 Power steering fails — the steering wheel will become heavy.
- ❄️ The air conditioner stops working.
- 🔥 On some Almera G15 the pump may stop and the engine will overheat.
If the belt breaks, immediately disconnect all consumers (headlights, heater) and move to the service station in a tow or tow truck.
How often should the condition of the belt be checked?
Recommended inspection interval - every 15–20 thousand km or once a year. Pay special attention to the belt:
- 🌡️ After a hot summer or frosty winter (rubber loses elasticity).
- 💧 If there were oil or antifreeze leaks under the hood.
- 🚗 After off-road driving (sand and dirt accelerate wear).