A bus is a high-risk vehicle, and its braking system must work flawlessly. Even the slightest malfunction can lead to tragedy, especially when it comes to passenger transportation. According to Traffic rules of the Russian Federation (clause 2.3.1), the driver is obliged to stop driving when detecting critical brake defects, which make operating the bus impossible. But what kind of faults fall under this ban? And what threatens the driver or carrier if the requirements are ignored?

In this article we will analyze all cases when further movement of the bus is prohibited, and we will also tell you how to act correctly if problems are detected. You will learn about fines for driving with faulty brakes, diagnostic methods and legal nuances. Information is current on 2026 and is based on the latest changes in legislation.

We will pay special attention passenger buses of categories D and D1, since they are subject to the most stringent requirements. If you are a driver, dispatcher or fleet owner, this article will help you avoid fines and save the lives of passengers.

1. List of brake system malfunctions that prohibit the movement of the bus

According to Appendix No. 1 to the Russian Federation Traffic Regulations (List of faults), the movement of the bus is prohibited if the brake system has the following defects:

  • 🚨 Service brake system failure — complete or partial loss of braking efficiency.
  • 🔧 Brake fluid leak from the main or working cylinders, leading to a drop in pressure.
  • ⚠️ Parking brake malfunction — the bus cannot be maintained on a slope of 16% or more.
  • 🔄 Brake failure on one axle (for example, only the front or only the rear wheels brake).
  • 🛑 Brake jamming — the wheels do not rotate freely when the pedal is released.

These faults relate to critical, as they directly affect safety. For example, if a bus fails to brake on a descent or during an emergency maneuver, the consequences can be catastrophic.

Important: even if the fault appears periodically (for example, the brakes “disappear” when heated), this is already a reason to stop moving. Traffic regulations do not make exceptions for “temporary” breakdowns.

📊 How often do you check your bus brakes before a trip?
Every day
Once a week
Only before inspection
As needed

2. Why are buses with faulty brakes especially dangerous?

A bus is not a car. Its weight, dimensions and number of passengers make any brake malfunction extremely risky. Here's why:

  • 🚍 Great inertia — even at low speeds, a bus requires a significantly longer distance to stop than a passenger car.
  • 👥 Passengers without seat belts — in most buses, seat belts are provided only for the driver, so sudden braking can lead to injury.
  • 🛣️ Difficulty of maneuver — on a slippery road or downhill, faulty brakes make the bus almost uncontrollable.

According to statistics traffic police, more than 30% of bus accidents occur due to faulty brake systems. Moreover, in 70% of cases the driver knew about the problem, but continued moving.

⚠️ Attention! If the bus carries children, the requirements for brakes are even stricter. According to Federal Law No. 196-FZ, the children's bus must pass pre-trip brake control with recording in the journal.

3. How to check the bus brakes before leaving: step-by-step instructions

To avoid fines and accidents, the driver is obliged to carry out pre-trip control of the brake system. Here's what to do:

Visual inspection of brake hoses and tubes for cracks and leaks

Checking the brake fluid level in the reservoir (must be between MIN and MAX)

Test of the working brake system: press the pedal - it should not “fail”

Checking the parking brake: the bus must be held on a slope of 16% (approximately 1:6)

Control of free play of the brake pedal (for a pneumatic system - 5–10 mm)

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If at least one of the points is not fulfilled, movement prohibited. For example, if the brake pedal becomes soft, this may indicate air entering the system or fluid leak.

For buses with pneumatic brake drive (for example, MAZ, LiAZ, PAZ) additionally check:

  • 🔹 Pressure in the pneumatic system (must be at least 6.5–7.5 kg/cm²).
  • 🔹 Compressor operation (it should pump air to operating pressure in 2-3 minutes).
  • 🔹 Tightness of highways (listening to hissing is a sign of a leak).

On modern buses (eg Mercedes-Benz Sprinter, Scania, MAN) many parameters are displayed on the dashboard. If the indicator lights up ABS or ESP, this is a reason for immediate diagnosis.

4. Fines for driving with faulty brakes in 2026

If the traffic police inspector identifies malfunctions in the brake system that prohibit movement, the driver and carrier face the following sanctions:

Violation Driver fine Fine for a legal entity Additional measures
Driving with faulty brakes (Part 2 of Article 12.5 of the Administrative Code) 500 ₽ From 30,000 to 50,000 ₽ Detention of the vehicle until the fault is eliminated
Repeated violation within a year 5,000 ₽ or deprivation of rights for 3–6 months From 100,000 to 150,000 ₽ Suspension of the carrier's activities for 90 days
Failure to pass inspection due to brakes 2 000 ₽ From 50,000 to 100,000 ₽ Prohibition on operation until repair
Accident due to faulty brakes Up to 30,000 ₽ or deprivation of rights for 1.5–2 years Up to 500,000 ₽ + criminal liability in case of death Withdrawal of a transportation license

In addition to fines, the inspector has the right evacuate the bus to the impound lotif the fault cannot be repaired on site. The cost of evacuation and storage is borne by the vehicle owner.

⚠️ Attention! If the bus carries children, fines are doubled (part 5 of article 12.5 of the Administrative Code). For example, for faulty brakes the driver faces 25 000 ₽ instead of 500 ₽.

5. What to do if the brakes fail on the road?

If a brake system malfunction occurs while driving, the driver must act according to the following algorithm:

  1. Keep calm - Panic will make the situation worse.
  2. Turn on the hazard lights and try to pull over to the side of the road.
  3. Use engine braking:
    • For manual transmission: shift to lower gears (4→3→2).
    • On automatic transmission: move the selector to mode L or 1.
  • Apply the parking brake (but not sharply, so as not to block the wheels).
  • Stop the bus and call a tow truck or technical assistance.

    • It is strictly prohibited:

    • 🚫 Continue driving “to the nearest service station.”
    • 🚫 Pull the handbrake sharply at high speed (risk of skidding).
    • 🚫 Turn off the engine (the brake booster and power steering will stop working).
    💡

    If the bus is equipped spare brake system (for example, retarder or electromagnetic brake), use it to smoothly reduce speed.

    6. How often should the bus brakes be checked?

    The timing of checking the brake system of a bus is regulated by several documents:

    • 📅 Daily control — before each departure (clause 18 Order of the Ministry of Transport No. 208).
    • 🔧 Maintenance — every 10,000–15,000 km or once every 6 months.
    • 🛠️ Diagnostic card — once every 6 months for buses older than 5 years.
    • 🚍 Seasonal check - before the winter and summer periods (especially for pneumatic systems).

    For buses operating in mountainous area or with increased loads (for example, intercity flights), checks are carried out more often - every 5,000 km.

    Modern buses (eg Volvo 9700, Neoplan Tourliner) equipped self-diagnosis systems, which indicate malfunctions on the instrument panel. However, this does not cancel manual check!

    What is checked during a bus brake inspection?

    During technical inspection, the brake system of the bus passes bench tests:

    1. Measurement braking distance (must be no more than 12.2 m at a speed of 40 km/h for M3 category buses).
    2. Check uniformity of braking wheels (the difference is no more than 20%).
    3. Control pedal effort (for a hydraulic system - 50–70 kgf).
    4. Test parking brake on a slope.
    5. Check tightness pneumatic or hydraulic systems.

    If at least one parameter does not correspond to the norm, the bus not allowed for use.

    If a bus with faulty brakes gets into an accident, responsibility will fall not only on the driver, but also on:

    • 🏢 Legal entity (vehicle fleet, transport company).
    • 👔 Official (director, mechanic responsible for technical condition).
    • 📋 The person who carried out the inspection (if the fault was missed).

    By Art. 268 of the Criminal Code of the Russian Federation, if people die due to faulty brakes, those responsible face:

    • 🔹 Imprisonment for up to 7 years (if 2 or more people die).
    • 🔹Fine up to 500 000 ₽ or forced labor.
    • 🔹 Deprivation of the right to hold positions in the transportation sector.

    In 2023, 12 bus accidents were recorded in Russia due to faulty brakes, in which 47 people died. In all cases, the perpetrators received real sentences.

    ⚠️ Attention! If the bus is rented, the responsibility lies with tenant, not the owner. This is stated in Art. 640 Civil Code of the Russian Federation.
    💡

    Even if the driver is not to blame for the breakdown (for example, the brake hose burst suddenly), the carrier still bears administrative responsibility for releasing a faulty vehicle onto the line.

    FAQ: Frequently asked questions about bus brake malfunctions

    Is it possible to get to the service station if the brakes are a little “sticky”?

    No. Even slight jamming of the brake pads leads to:

    • 🔥 Overheating of brake discs and drums.
    • 🛞 Uneven tire wear.
    • ⚠️ Risk of complete brake failure when heated.

    According to traffic rules, any violation of the free rotation of the wheels - a reason for a traffic ban.

    What is the punishment if the brakes fail but no accident occurs?

    If the traffic police inspector detects a malfunction:

    • To the driver - fine 500 ₽ (Part 2 of Article 12.5 of the Administrative Code).
    • Legal entity - up to 50,000 ₽.
    • Bus evacuate to the impound lot.

    If a malfunction is detected the driver himself and call a tow truck, a fine can be avoided.

    What should I do if the brake fluid is dark but the brakes work?

    Darkening of the liquid indicates:

    • 💧 Moisture ingress (reduces boiling point).
    • 🔧 Wear of rubber seals.
    • ⚠️ Risk of corrosion of brake cylinders.

    Even if the brakes are still working, the fluid needs to be replaced urgently. According to the regulations, it is updated every 2 years or 40,000 km.

    Is it possible to operate a bus if the ABS light is on?

    If it catches fire ABS indicator, but the main brakes work:

    • ✅ Movement allowed, but with caution (ABS helps with emergency braking).
    • ⚠️ If it lights up along with ABS brake system light (red exclamation point) - movement prohibited.

    The reason may be:

    • 🔌 ABS sensor breakage.
    • 🛠️ Damage to the ring gear on the hub.
    • 🔋 Control unit malfunction.
    What brake pads are best for a bus?

    The following pads are recommended for buses:

    • 🚍 Low-metallic — for difficult conditions (they last longer, but the discs wear out more).
    • 🌿 Ceramic — less dusty, suitable for city buses.
    • 🔥 Semi-metallic — the best option in terms of price/quality.

    For buses MAZ, LiAZ, PAZ pads are often used Ferodo, Textar, TRW. The main thing is that they are certified for a specific model.