Bypass belt in Nissan Almera - this is a critical element that ensures the operation of auxiliary units: generator, power steering (power steering), air conditioning and pump. Its breakage or improper tension can lead to electronic failure, engine overheating or loss of control. In this article we will look at exact belt layout diagrams for different generations Almera (G15, N16, Classic), we’ll tell you how to check its condition yourself, select an analogue according to the article numbers and avoid typical mistakes when replacing.

Feature Almera - in the design of drive belts, which differs depending on the configuration and year of manufacture. For example, in models with air conditioning, the circuit includes an additional pulley, while in basic versions the belt can only drive the generator and pump. We have collected current data on sizes, tensioners and spare parts compatibility, which will help save on service costs and extend the service life of units.

Bypass belt diagrams for different generations of Nissan Almera

Drive belt design Nissan Almera depended on the generation and type of engine. Below are official schemes for the most common modifications. Please note: even within the same generation, the location of the pulleys may differ due to options (for example, the presence of power steering or air conditioning).

To accurately identify your circuit, check:

  • 🔧 Year of manufacture and body (G15, N16, Classic).
  • 📋 Engine type (For example, QG15DE, HR16DE).
  • ⚙️ Availability of auxiliary units: Power steering, air conditioning, compressor.

If your modification is not listed, use universal method: Take a photo of the location of the pulleys before removing the old belt or contact VIN code to clarify the configuration.

📊 What generation of Nissan Almera do you have?
  • G15 (2012–2019)
  • N16 (2000–2006)
  • Classic (2006–2012)
  • Other

1. Nissan Almera G15 (2012–2019, HR16DE, K4M engines)

This generation uses serpentine belt with 6 streams (6PK). The scheme depends on the configuration:

  • 🔄 Without air conditioning: The belt covers the crankshaft, generator and pump pulleys.
  • ❄️ With air conditioning: A compressor pulley is added and the belt length increases.
Belt diagram for Nissan Almera G15 with air conditioning Diagram for G15 with air conditioning (HR16DE). Source: Nissan service manual
Equipment Belt length(mm) Original article number Analogues
Without air conditioning 1720 11920-4M000 Contitech 6PK1720, Gates 6PK1723
With air conditioning 2130 11920-4M010 Dayco 6PK2130, Bosch 1987949680

2. Nissan Almera N16 (2000–2006, QG15DE, QG18DE engines)

The belt used here is a 5-way belt (5PK). Main feature - no automatic tensioner in earlier versions (before 2003). The tension is adjusted by moving the generator.

In models with power steering and air conditioning, the scheme becomes more complicated: the belt passes through the pulleys:

  1. Crankshaft → generator → power steering → air conditioning → pump.
⚠️ Attention: B Almera N16 with engine QG18DE (1.8 L) belt length used 1885 mm, whereas in QG15DE (1.5 l) — 1745 mm. You cannot confuse them: this will lead to slippage or breakage.

3. Nissan Almera Classic (2006–2012, QG15DE engine)

This generation inherited the pattern from N16, but with minor changes:

  • 🔧 Added automatic tensioner (article 11950-4M000).
  • 📏 Belt length — 1745 mm (5PK) for basic version, 2000 mm for versions with air conditioning.

Scheme for Classic with air conditioning:

Almera Classic belt diagram with power steering and air conditioning

How to check the condition of a bypass belt: 5 signs of wear

Bypass belt in Nissan Almera does not have a clear replacement schedule (unlike the timing belt), but its condition must be monitored every 20–30 thousand km. Here are the key signs that the belt needs replacing:

  • 🔊 Whistle when starting engine or when turning on the air conditioning/power steering - indicates slippage due to weak tension or wear.
  • 🕳️ Cracks or delaminations on the inside of the belt (visible upon visual inspection).
  • 💨 Loss of elasticity: the belt becomes stiff or, conversely, stretches.
  • 🔄 Uneven wear of streams - indicates pulley misalignment.
  • 🚨 Extraneous noise from under the hood when the engine is idling.

To check the tension, use dynamometer tester or manual method:

  1. Press the belt between the generator and crankshaft pulleys firmly 10 kgf.
  2. The deflection should be 8–12 mm for a new belt and up to 15 mm for worn out.
⚠️ Attention: B Almera G15 With an automatic tensioner, the deflection cannot be checked - this can damage the mechanism. Focus only on visual signs of wear.
💡

If the belt squeals only in wet weather, the problem may be water getting on the pulleys. Treat the belt and rollers with silicone lubricant (for example, Liqui Moly Silicon-Spray).

Step-by-step instructions for replacing the bypass belt

Replacing the belt in Nissan Almera does not require special tools, but it is important to observe sequence of actions and take into account the nuances of a particular model. Below are universal instructions suitable for most modifications.

Required tools and materials

  • 🔧 Set of sockets and keys (10, 12, 14 mm).
  • 🔨 Screwdriver with a flat blade (for fixing the tensioner).
  • 📏 New belt (see the article number in the table above).
  • 🛠️ Lubricant for rollers (Molykote G-4500 or equivalent).
  • 🧴 Degreaser (for example, WD-40).

Remove the negative terminal from the battery |

Fix the crankshaft (use 4th speed and handbrake)|

Take a photo of the belt layout|

Prepare a new belt and tools -->

Replacement process (using the example of Almera G15 with air conditioning)

  1. Loosen the tensioner:

    • Turn the tension roller bolt counterclockwise (14 mm wrench).
    • Secure the roller in the loose position with a screwdriver.

  • Remove the old belt:

    Carefully slide the belt off the pulleys, starting at the alternator. If the belt is stuck, use a flathead screwdriver to pry it open (but do not damage the pulley grooves!).

  • Install a new belt:

    Follow the diagram (see section above). Start with the crankshaft pulley, then cover the alternator, air conditioning compressor, and water pump. The last thing to put on is the tensioner pulley.

  • Pull the belt:

    Turn the tensioner clockwise until the marks (on the roller and bracket) match. For Almera G15 Normal tension is when the tensioner arrow is in the green zone.

  • Check your work:

    Start the engine and turn on the maximum load (air conditioning, headlights, heated windows). Listen for whistling or vibrations.

    • What should I do if the belt slips after replacement?

    If the new belt squeals, check:

    1. **Pulley alignment** - even a slight misalignment leads to accelerated wear.

    2. **Condition of the rollers** - worn bearings create additional resistance.

    3. **Belt quality** - cheap analogues (for example, without markings EPDM) lose elasticity after 5–10 thousand km.

    4. **Tension** - in manual tensioners (as in N16) often requires a tightening after 500 km.

    Typical replacement mistakes and how to avoid them

    Even experienced car owners make mistakes when working with the idler belt. Nissan Almera. Here are the most common ones and ways to prevent them:

    Error Consequences How to avoid
    Using a belt of the wrong length Slippage, breakage, damage to pulleys Check the article by VIN or visually compare with the old belt
    Incorrect installation (belt twist) Accelerated wear of streams, whistling Follow the direction of rotation marks (arrows on the belt)
    Ignoring roller checks Roller bearings can jam, breaking the belt. Scroll the rollers by hand - they should rotate without play or noise
    Excessive tension Overloading of generator and pump bearings Use a torque wrench or refer to the tensioner marks

    Pay special attention tensioner: in Almera Classic And N16 it often fails due to spring corrosion. When replacing the belt, it is recommended to lubricate the tensioner mechanism lithium grease.

    💡

    If a hum appears after replacing the belt, most likely the problem is in the tension or deflection pulley. Don't ignore this sound: a worn pulley can jam and break the belt while in motion.

    How to choose an analogue: articles and brands

    Original belts Nissan They are of high quality, but their price is often inflated. There are worthy analogues on the market that are not inferior in terms of resource. The main thing is to choose belts with markings EPDM (resistant to high temperatures and oil).

    Here are the verified brands and articles for Almera:

    Model Almera Original article Recommended analogues Notes
    G15 (HR16DE, with air conditioning) 11920-4M010 Gates 6PK2130, Contitech 6PK2130, Dayco 6PK2130 Gates - the best choice in terms of price/quality ratio
    N16 (QG15DE, without air conditioning) 11920-4M005 Bosch 1987949670, SKF VKM 33015 SKF is cheaper, but the service life is 20% lower than the original
    Classic (QG15DE, with power steering) 11920-4M00A Optibelt 6PK1885, Bando 6PK1883 Optibelt is suitable for extreme temperatures

    When purchasing, pay attention to:

    • 📌 Number of streams (5PK or 6PK).
    • 📏 Exact length (tolerance ±5 mm).
    • 🏷️ Marking: The original has a logo Nissan and catalog number.
    ⚠️ Attention: Counterfeit brands are often found in online stores Gates or Contitech. Check the packaging: the original is sealed, with a hologram.

    Frequently asked questions about the Nissan Almera bypass belt

    Is it possible to drive with a squealing belt?

    For a short time - yes, but this is a signal that replacement is necessary. A whistle indicates slippage, which leads to:

    • The battery is undercharged (if the belt drives the generator).
    • Engine overheating (if the belt turns the pump).
    • Increased wear of the belt and pulleys.

    B Almera G15 The whistle may appear after rain - this is normal if it disappears after 5-10 minutes of driving.

    How often should I change the bypass belt?

    Official regulations Nissan - every 60 thousand km or 4 years. However, in practice, the period depends on the operating conditions:

    • 🌡️ In hot climates or with frequent short trips - every 40–50 thousand km.
    • ❄️ In regions with cold winters, the belt lasts longer (up to 80 thousand km).
    • 🚗 If you have an aggressive driving style (high revs), check every 20 thousand km.
    What is the difference between a timing belt and a timing belt?

    These are two different elements:

    • Bypass belt drives auxiliary units (generator, power steering, air conditioning). Its breakage does not lead to engine failure, but makes the car uncontrollable.
    • Timing belt synchronizes the operation of the crankshaft and camshafts. Its cliff on Almera with engines QG15DE/QG18DE leads to bending of valves and major repairs.

    On Almera G15 with engine HR16DE a timing chain is used, so it is impossible to confuse the belts.

    Can I install a belt from another Nissan model?

    Theoretically yes, if they match:

    • 📏 Length and number of streams.
    • 🔧 Tensioner type (automatic or manual).
    • ⚙️ Pulley layout diagram.

    For example, a belt from Nissan Note (E11) with engine HR16DE suitable for Almera G15, since they have an identical circuit. But it is better to use the articles listed in our table.

    What happens if the bypass belt breaks?

    The consequences depend on what aggregates it brings:

    • 🔋 Without generator: The battery will be discharged, the electric power steering and on-board electronics will be disabled.
    • 💦 Without pomp: The engine will overheat (risk of seizure).
    • ❄️ Without air conditioning compressor: Only the climate control will turn off.
    • 🚗 Without power steering: The steering wheel will become stiff but manageable.

    B Almera N16 With a manual tensioner, the belt may fly off the pulleys - in this case, it will wrap around the crankshaft and break.