What does an air conditioning compressor do?

The AC compressor pumps and pressurises the refrigerant through the air conditioning system, feeding cold air into your car. The compressor is powered by your car’s engine.

How often should a compressor need replacing?

A well-maintained and properly serviced compressor could last as long as your car does. However, as with all vehicle components, they’re prone to wear and tear. Leakage and blockage can create irreparable damage.

The law, vehicle regulations and your MOT

A **faulty air compressor **won’t affect your car’s MOT, but it can affect the comfort of you and your passengers. It’s worth keeping your air conditioning running correctly as the impact it can have on your vehicle’s fuel efficiency could affect the day-to-day cost of your motoring.

What happens when we replace your AC compressor?

Our efficient and fully qualified mechanics will check for possible fault codes relating to your air conditioning that could lead them directly to a compressor fault.

The air conditioning system will be checked thoroughly, including electric and pressure components.

Wherever required your compressor will be replaced, and you’ll be advised of any other connected or associated problems arising from its malfunction. Important associated parts will also be removed and cleaned.

You will be advised of any other parts that may need to be replaced for the best operation and health of your vehicle. This includes replacement of refrigerant and possibly the orifice tube and receiver dryer.

Once the faulty compressor has been replaced, our mechanics will test it thoroughly to ensure the correct running of the new part and make any adjustments required for its premium operation.

What causes an AC compressor to stop working correctly?

Over time, the internal components of a compressor can wear or fail, including the seals that cannot be replaced independently. In other cases, the valves, pistons, bearings or clutch may need replacing, and it could be a cheaper option to replace the complete unit rather than each of the individual parts. Your compressor may have stopped working properly due to infiltration by dirt and debris, or from being affected by other faulty parts in the system.

Symptoms of a malfunctioning AC compressor

Your air con doesn’t work

If the air conditioning in your car doesn’t function as it normally would then it could be down to a faulty compressor.

There is no cool air

If your air vents aren’t producing cool air when your AC is operational, it could be your compressor that’s malfunctioning.

Your fuel consumption isn’t as good as normal

A malfunctioning compressor could also affect your fuel consumption, so if you notice that you’re not achieving your usual mpg, it could be time to have your compressor checked.

Unusual noises in the engine bay

If you hear a ticking noise coming from your engine, then this could be a sign that your compressor is damaged. The AC unit is damp If there are patches of fluid around the AC unit, this could also be a sign of a faulty compressor.

BMW

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.