CBS SYMBOL INDEX - WHAT DO THEY MEAN AND WHAT'S CHECKED?

Which areas of your vehicle need attention?

In the new 5, 6 and 7 Series models, the instrument cluster will send the sorted data to the Central Information Display (CID). There, the data can be selected for display in the Service menu using the 'I Drive', which will alert to you what areas of the vehicle need attention via the following symbols:

The symbols: What do they mean?

The following checks are undertaken when the following symbols are illuminated when your BMW is serviced at a BMW Service Authorised Workshop.

Engine oil

CBS models: What's checked or changed when this symbol appears?

  • The engine oil and oil filter are changed because keeping the oil at the right level and clean is vital to the protection and longevity of the life of movable engine parts. Also, if you do a lot of short journeys, your oil filter will be more susceptible to blockages caused by the condensation of water in the oil.
  • The handbrake is checked - unlike the foot brakes, the handbrake is a mechanical function and therefore has to be checked for any necessary adjustment as standard.
  • With every 3rd oil change:
    • Intake silencer: replace air filter element - this can reduce your fuel consumption by up to 10% as the engine can breathe more easily.
    • Fuel filter: replace main fuel filter (only if diesel) - this will ensure a higher purification level of your fuel.

Micro-filters

CBS models: What's checked or changed when this symbol appears?

  • Heating, air conditioning or automatic air conditioning: replace micro filter/carbon canister - this is important because micro filters trap 80% of the pollen and traffic fumes before it gets into the cabin, helps keep drivers and passengers alert and helps demist windows quickly even on a rainy winter's day.
  • Reset indicator.

Front brakes

CBS models: What's checked or changed when this symbol appears?

  • Brake pads are changed, and the brake caliper cavities are cleaned. Failure to get your brake pads replaced will result in a reduction in braking performance, and if the callipers are cleaned, any squeaking in the brakes should be diminished.
  • Brake discs:
    • Surface and thickness - the importance of having a safe level of thickness in your brake discs is paramount to your driving safety; if necessary, the brake discs will be replaced.
  • Reset indicator.

Rear brakes

CBS models: What's checked or changed when this symbol appears?

  • Brake pads are changed, and the brake caliper cavities are cleaned. Failure to get your brake pads matched correctly will result in a brake imbalance front to rear on your vehicle, and if the callipers are cleaned, any squeaking in the brakes should be diminished.
  • Brake discs:- Surface and thickness - the importance of having a safe level of thickness in your brake discs is paramount to your driving safety; if necessary, the brake discs will be replaced.
  • Handbrake:
    • Condition, brake lining thickness and function - unlike the foot brakes, the handbrake is a mechanical function and therefore has to be checked for any necessary adjustment. As the handbrake is connected to the rear brake shoes, over time these shoes wear and therefore these will also require inspection to ensure a serviceable condition. (The brake shoes when applied by the handbrake clamps the drums of the rear brake disc, therefore securing the rear wheels in a locked position, the mating surfaces have to be in good order).
    • If necessary, the handbrake or any of its other components will be replaced.
  • Reset indicator.

Brake fluid

CBS models: What's checked or changed when this symbol appears?

  • Brake fluid is changed. The problem with brake fluid is that it absorbs moisture from the air quickly. This is important because the amount of moisture in your brake fluid affects your vehicle's performance. As water content in brake fluid increases over time, the boiling point decreases. Fluid with a reduced boiling point (or high water content) can create vapour by boiling in the caliper, or wheel cylinder. Potentially, this could reduce braking performance significantly, and can also contribute to corrosion of parts, such as steel pistons and ABS modulators.
  • Reset indicator.

Diesel filter

CBS models: What's checked or changed when this symbol appears? (Only on diesel models)

  • Diesel filter is changed. This filter is important to the general efficiency of diesel engines. As the fuel passes through this filter, unwanted particles and residue will become trapped, so that the fuel is passing to the engine is 'clean'. Therefore, this filter has to be replaced when indicated to ensure that your engine is running at optimum performance.
  • Reset indicator.

MOT

CBS models:

  • Statutory inspection for vehicles 3 years and older.
  • Annual check comprising of over 150 safety related items and exhaust emission system test.
  • Checked items, for example include lights, steering, brakes, suspension and fuel system.
  • Government regulated inspection.

Spark plugs

CBS models: What's checked or changed when this symbol appears? (Only on petrol models)

  • Spark plugs are replaced. When it comes to fuel efficiently, spark plugs are one of the most critical parts of a petrol car's engine. Defective spark plugs can result in worsening emissions and increased fuel consumption, and can even result in misfires if not replaced. Replacing these worn spark plugs will improve the performance of the engine.
  • Reset indicator.

Vehicle check

CBS models: What's checked or changed when this symbol appears?

  • Diagnosis test.
  • Horn, headlight flasher and hazard warning lights.
  • Instrument and indication field lighting, check heater blower.
  • Windscreen wash/wipe system.
  • Body: checked for corrosion.
  • Tyres: tread depths, tread pattern and external condition, check inflation pressures and correct if necessary (spare wheel checked also).
  • Battery: display checked, and if necessary, replaced. - If your car is a few years old it is worth getting your battery checked prior to the onset of cold and damp weather, as these conditions can contribute to deterioration in the battery.
  • Steering fluid reservoir: fluid level checked.
  • Coolant level and refill if necessary: if there's too little water and anti-freeze in the cooling system, then the engine can overheat and cause potentially serious damage.
  • Windscreen washer system: check fluid level, top up if necessary.
  • Brake lines and connections: checked for leaks, damage, and correct position.
  • Under-body including all visible parts: checked for damage, leaks and corrosion.
  • Steering components: checked for clearance, leaks, damage and wear.
  • Check for roadworthiness
    • Brakes
    • Steering
    • Shock absorbers; and
    • Clutch / automatic transmission

ADDITIONALLY: A Standard Scope inspection is carried out on your BMW when it is brought in for a service. This inspection includes:

  • Check of control messages.
  • Check of telltale and warning lights flagged in the LCD display.

Call, click or visit us today at Marshall BMW in Grimsby, Scunthorpe, Bournemouth, Hampshire or Salisbury for more information and to find out about our latest service offers.

MARSHALL BMW OF GRIMSBY 01472 728348
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