BMW throttle body replacement, made easy

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How much does a throttle body replacement cost for BMW cars?

A typical BMW throttle body replacement in the UK costs around £249 - £659. Depending on your BMW model and engine, and whether you live in a big city or a small one, the price of a throttle body replacement on your vehicle can be higher or lower. We computed prices for some of the best-selling BMW cars in the UK in order to give you an idea of how much a throttle body replacement costs.
Car modelFixter price range
Throttle body replacement for BMW 3 Series£270 - £425
Throttle body replacement for BMW 1 Series£249 - £391
Throttle body replacement for BMW 5 Series£256 - £402
Throttle body replacement for BMW X1£256 - £402
Throttle body replacement for BMW X3£270 - £425
Throttle body replacement for BMW X5£419 - £659
Throttle body replacement for BMW 4 Series Coupe£249 - £391

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Our expert insights

What does a throttle body do?

The throttle body is a critical piece of the air intake system that controls the amount of air flowing into the engine. It consists of a pivoting flat valve and is located between the air intake and engine manifold where fresh air is pulled into the engine for the combustion process.

What are the symptoms of a bad throttle body?

Below are the top three symptoms that could indicate you need to replace your throttle body:

  • A very poor or rough idle

  • Poor or unreliable acceleration

  • Excess fuel consumption

What happens when we do a throttle body repair on your car?

Our certified mechanics will:

  • Analyse the ECU to see if there are any related fault codes.

  • Inspect the throttle body and air intake system.

  • Replace the throttle body if there are issues with it.

  • Clean the air intake system of dirt and residue.

  • Advise if any other parts need to be replaced.

  • Finally they will run the engine and test drive the car.

Daniel, from LondonDaniel, from London

Hey Fixter, can I drive with a bad throttle body?

I wouldn’t recommend driving with a failing throttle body. Your car could be very difficult to handle, it could break down whilst driving, or it could even accelerate unpredictably and uncontrollably - which is a very dangerous situation to be in on the roads.

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Want to learn more about BMW throttle body replacement?

What does a throttle body do?

In today's modern fuel injected cars, the throttle body is a critical piece of the air intake system that controls the amount of air flowing into the engine. It sits between the air intake and engine manifold where fresh air is pulled into the engine for the combustion process.

The throttle body itself consists of a tube containing a pivoting flat valve (butterfly). When the driver presses the acceleration pedal the butterfly in the throttle body pivots to let more air flow into the manifold. When this happens, the throttle position sensor reports to the ECU that you have pressed the accelerator. The airflow sensor then detects more air and sends a message to the car’s computer to boost the amount of fuel being supplied by the injectors. This whole process is what enables your car to accelerate.

A good air filter is absolutely critical to the healthy operation of the throttle body, because dirt buildup on its surface over time can cause the butterfly valve to stick, causing a rough idle and drivability issues. It is therefore important that both the air filter and the throttle body are well maintained and kept clean.

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.

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.

How often should a throttle body need replacing?

In today's modern fuel injected cars, the throttle body is a critical piece of the air intake system that controls the amount of air flowing into the engine. Because it is crucial to the healthy running of your vehicle, the throttle body should be well maintained and cleaned at least every 75,000 miles.

If you begin to notice any signs that your throttle body might be failing, such as a rough idle, frequent stalling or unreliable acceleration, you should book your car in to have the air flow system and the throttle body inspected as soon as possible. When the throttle body begins to fail it will get progressively worse (and more dangerous!) over time.

What happens during a throttle body replacement?

Our certified mechanics will:

  • Analyse the ECU to see if there are any related fault codes.

  • Inspect the throttle body and air intake system.

  • Replace the throttle body if there are issues with it.

  • Clean the air intake system of dirt and residue.

  • Advise if any other parts need to be replaced.

  • Finally they will run the engine and test drive the car.

What causes a throttle body to break?

Like most car parts, over time the throttle body will experience wear and may begin to fail. Another common issue is caused by the filth, carbon, and dirt that can build up in the throttle body housing and air intake system, creating problems with air flow. This interrupts the perfect mixture of air and fuel and can cause the butterfly valve to get stuck. Therefore regular cleaning and maintenance of the system and throttle body is crucial for a healthy and reliable car.

What are the symptoms of a bad throttle body?

Usually, there a few signs you can look for:

  • A very poor or rough idle

  • Poor or unreliable acceleration

  • Excess fuel consumption

  • Car misfiring

  • A delay from when you step on the acceleration until the car responds

  • A visibly dirty throttle body

  • Stalling more frequently

  • Check engine light comes on

How often should you replace your throttle body?

There is no set lifespan when it comes to the throttle body, however it is suggested that you clean it thoroughly at about 75,000 miles. Cleaning the throttle body and air intake system allows your car to operate more smoothly and it helps prolong its life.

What happens during a throttle body replacement?

Our certified mechanics will:

  • Analyse the ECU to see if there are any related fault codes.

  • Inspect the throttle body and air intake system.

  • Replace the throttle body if there are issues with it.

  • Clean the air intake system of dirt and residue.

  • Advise if any other parts need to be replaced.

  • Finally they will run the engine and test drive the car.

What is the average life of a throttle body?

There is no set lifespan when it comes to the throttle body, however it is suggested that you clean it thoroughly at about 75,000 miles. Cleaning the throttle body and air intake system allows your car to operate more smoothly and it helps prolong its life. Like with many car components, if the throttle body is well serviced and properly maintained it should last a while.

Can you drive with a bad throttle body?

Driving with a bad throttle body is not recommended. Your car could be very difficult to handle, it could break down whilst driving, or it could even accelerate unpredictably and uncontrollably - which is a very dangerous situation to be in on the roads. When the throttle body begins to fail it will get progressively worse (and more dangerous!) over time. You should book your car inn to be looked at as soon as you suspect there may be a problem.

Does the throttle body deteriorate with age?

Like most car parts, over time the throttle body will experience wear and may begin to fail. Filth, carbon, and dirt can also build up in the throttle body housing and air intake system over time, creating problems with air flow. This interrupts the perfect mixture of air and fuel and can cause the butterfly valve to get stuck. Therefore regular cleaning and maintenance of the system and throttle body is crucial for a healthy and reliable car.

The law, vehicle regulations and your MOT

If your throttle body is failing it could be affecting your fuel consumption and emissions. Because there are strict regulations around car emissions in the UK, excess fuel consumption and emissions could result in a fine or an MOT failure. It's important to keep your car well maintained to avoid unnecessary costs and harmful emissions.

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