How do front brake discs work?
The brake disc is a metal plate mounted on the wheel hub that is clamped between **2 brake pads **when braking is applied; this causes friction and slows the vehicle down.
How often should brake discs need replacing?
As a rough guide, your brake discs should last between 50k and 70k miles, but there are many variables that could affect this, including driver behaviour, the weight you carry and the speed you travel.
The law, vehicle regulations and your MOT
Incorrect brake function, damaged or excessively worn discs or pads are considered unsafe for your vehicle performance and will cause your car to fail its MOT. Nearly 20% of MOT failures are caused by faulty brakes.
What causes brake discs to stop working correctly?
Brake discs wear out over time from continual use. The friction applied by the brake pads, and the intense heat generated, will eventually deform the disc, causing it to become thinner and less effective when performing its job.
Extended use can also cause brake discs to crack, rendering them ineffective. Scars and rust on the disc can be caused by debris thrown from the road and poor weather conditions; this is also effective in reducing the operation of your brake discs.
Symptoms of malfunctioning brakes discs
Braking causes unusual noises
Loud screeching or grinding noises from your brakes is an indication that there is a problem with either your brake discs or pads.
When your car pulls to one side under braking
If only one brake is working correctly, it can cause your car to pull in the direction of the functioning brake.
The car vibrates under braking
Your brake pads or discs could be warped if the pedal vibrates when you press down on it.
The front brake disc shows signs of damage
Look through the wheel for a visual check—if the disc’s surface isn’t smooth, or it displays cracks, grooves, spots or a blue colourisation, then the disc is quite likely damaged.
Your brake warning light on the dashboard is illuminated
If any of your dashboard warning lights are illuminated, the sensor that detects problems or worn out parts and components has identified an issue and activated the system.
BMW AG is a German automobile and motorcycle manufacturer that was established over 100 years ago in March 1916. They also own Mini and Rolls Royce, after taking over the two British marques in 2000 and 1998 respectively.
How popular is BMW in the United Kingdom?
BMW makes luxury vehicles and is possibly most famous for its sports saloon models. In 2018, BMW had 1.9m vehicles on the roads in the UK, a number that has been steadily increasing each year for the past decade.
As one of the ‘big 3’ German marques, along with Audi and Mercedes, BMW carries a strong reputation for making high-quality stylish vehicles, and have captured a large section of the UK market.
Luxury family and business models for every driver
Probably most popular for the 3 Series and 5 Series saloon models, BMW has got every possible angle covered for the more discerning drivers.
The full range includes everything from the 1 Series city car to the full-size saloons and sports coupes of the 7 and 8 Series models.
To provide everything you’d ever need for family motoring there’s a seven-seat MPV, their range of X model SUVs, and since 2014, the introduction of their plug-in electric i models. Top it all off with their M model high-performance supercars, the Z4 convertible and the i8 Roadster—and you’ve got the full package.
BMW: High performance on and off the track
BMW has a successful history in a range of motorsports.
They have been significant performers in touring car racing and rally driving, enjoyed success in Formula One with the BMW Sauber team, and BMW cars have been regular competitors and winners at Le Mans since the race’s early years.
BMW’s reliability and reputation
BMW ranked 16th place out of 30 car brands in the What Car? Reliability Survey in 2018. BMW hasn’t always had the best reputation for reliability but to rank alongside marques such as Honda, Volkswagen and Fiat they’re holding their own alongside plenty of the other big names.
Recent BMW recalls and reliability issues
Various recalls have been made on BMW models throughout their motoring history. The following are a list of the most recent in the UK and Europe.
22/03/2019 – BMW X5 (2018)
Incorrect tightening torque of left front seat fixing bolts
22/03/2019 – BMW X5, 5 Series (2000–2003)
Potential rupture of driver front airbag inflator
04/03/2019 – BMW X1 (2018–2019)
Rear lights may be fixed with incorrect securing units
01/03/2019 – BMW X5, X6, 7 Series, 6 Series and 5 Series (2009–2011)
Auxiliary water pump’s electronics could lead to a short circuit
01/02/2019 – BMW X5 and X6 (2007–2010)
The idler pulley bolt could become loosened
21/01/2019 – BMW M3, M4 and M4 convertible (2016)
The flange of the propshaft may become detached
27/12/2018 – BMW X6 (2014–2015)
EGR module cooler could leak
27/12/2018 – BMW 4 Series (2013–2015)
Exhaust gas recirculation module cooler could leak
All recall information sourced from gov.co.uk data.