Alfa Romeo have been manufacturing stylish and sporty automobiles since their beginnings in 1910, they have made everything from successful Formula one cars to city hatchbacks and everything in between. 

Whilst the general perception of Alfa Romeos is that of style and performance, they are also known for their tendency to be unreliable. However, more recent models such as the Giulia and Giulietta have shown similar reliability ratings to brands such as BMW or Audi.

In this article we’ll discuss some typical repair items you might encounter whilst owning any car, and compare the costs of repairing an Alfa Romeo, to the average car.

The repair costs of Alfa Romeos are generally higher than the average vehicle, in line with premium or luxury brands such as BMW, Audi and Mercedes. 

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Whilst modern models such as the Stelvio and Giulia are on par with many of their rivals such as cars made by BMW and Audi, overall Alfa Romeo places below average on most reliability charts.

However, this will be taking into account all the older models, such as the 159, 156 and Mito, so may not represent an accurate picture if you’re considering a newer car.

There are a number of common faults listed by reliability reviews and on online forums:

Most sources state the Giulia model, made after 2018 is the most reliable Alfa Romeo to buy. Its reliability scores are comparable to that of most other models in the same market segment.

This model is available with a 2.0L 4 cylinder or 6 cylinder 2.9L petrol engine, and is firmly in the luxury saloon category. Its competitors are the BMW 3 series, Mercedes C-Class and others.

Are Alfa Romeos more reliable than BMW or Audi?

Since 2020, the published reliability scores place Alfa Romeo incredibly close to BMW and Audi. This is due to the relatively high reliability scores of the later Guilia and Stelvio models, and the decline in reliability of many of the German brands.

In the past, most people would have said this was impossible, as BMW, Audi and other brands in the segment were well known for their high quality engineering, and Alfa purely for their style. 

But the increase in complexity in luxury brands, alongside the drive to compete with non-EU brands has meant many manufacturers have had to cut costs, which unfortunately reduces long term reliability. 

Whether you drive an Alfa, BMW, Audi or Ford, Bumper’s zero-percent interest 

 can help, especially if you have a big service coming up or are in need of repairs.

Choose from one of hundreds of participating garages across the country, to spread out expensive car repairs into manageable monthly payments.

How much does it cost to repair an Alfa Romeo?

Alfa Romeo Repair Costs

As the name suggests, an exhaust backbox is mounted at the back of the car and is the last component in the system. Like all exhaust components, they are subject to lots of road salt, moisture and debris, so they often rust out over time. 

Read on for more information on how much they are likely to cost, and how to know if your car's exhaust backbox needs replacing.

How much is an exhaust backbox to repair?

The cost of an exhaust backbox repair will range from £150 to £1,500, depending on the type of car. Other factors, such as system configuration (some cars don’t have a separate back box) and parts availability, affect the cost.

Below are the prices across some ranges of vehicle types:

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The back box is generally the very last silencer in the exhaust system; its job is to quieten down the exhaust noise before it exits the vehicle at the back.

Exhaust silencers work by absorbing the energy of the pressure (sound) waves caused by the engine's combustion. They do this by forcing the gases through packing material such as metal or mineral wools. 

Another technique is to cause the sound waves to diffuse by routing them through chambers and perforated tubes that slow down and modify the pressure pulses, reducing the overall volume. 

How to tell if my backbox needs replacing

The first sign of any damaged exhaust component is likely to be the noise. If your car is suddenly much louder than normal, or you can hear a slight puffing or chugging noise when walking around it whilst idling, it’s likely your exhaust is leaking somewhere.

Without getting under the car, it’s going to be very difficult to tell where the leak is coming from exactly, but the most common places to go are the joints between the piping and a silencer, such as the back box. 

For a quick and simple check of your back box, have a peek under the rear of the car (with the engine off) and look for obvious signs of rust, which will show as a light or dark orange colour. 

Pay close attention to the front of the back box - which is likely to be roughly inline with the rear wheels. Note any damage or separation of the metal skin of the back box – these are all signs the part needs to be replaced. 

You should not drive with a leaking exhaust, regardless of where the leak is, it should be repaired as soon as possible to avoid more damage occurring.

Not only is the noise likely to be distracting and anti-social, the exhaust fumes could easily enter the vehicle, which can cause dizziness, nausea and loss of consciousness. It can also cause error messages from erroneous sensor readings. 

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How Much Does an Exhaust Backbox Repair Cost?

Exhaust black box repair cost

Airbags use electrical signals from various crash sensors around the car to trigger an explosive reaction that inflates the airbag. Therefore, any issues with the car's wiring to the airbags will cause them not to work when needed. 

In this article, we’ll discuss the potential costs of airbag wiring repairs and why they occur. 

Repairing airbag wiring can cost anywhere from £60 to £500+, depending on the cause of the problem. In some cases, a simple reset, fuse replacement or plug clean up can sort airbag wiring issues, but it could also be a much more extensive repair needed.

If wiring is severely damaged by water ingress, physical damage or a defect, large sections of wiring loom may need to be replaced, which can take multiple hours to diagnose and repair.

Another factor is the type of garage you take the car to; a main dealer is likely to charge far higher prices than an independent garage, but on more modern or specialised cars, the main dealer may be the only place with the software needed to diagnose the problem.

First invented in the 1970s, airbags use a textile sack that rapidly inflates in the event of an accident to protect the car's occupants. It does this by way of an explosive charge igniting inside the assembly. This charge is triggered by an electronic signal, typically sent from the airbag ECU.

Airbags inflate in around 10 milliseconds, but are not fully sealed; they have flaps to allow the air inside to escape upon impact with a driver or passenger. This helps to dissipate energy, reducing the deceleration the person experiences, thus reducing the likelihood of injury.

Modern cars have airbags not only in the dashboard and steering wheel, but in the seats, roof lining and even doors too. Any one of these airbags developing a fault will signal an airbag warning to the driver.

Wiring in a car is different to that in a house or building, it is under constant vibration when the car is being driven, and harsh heat cycling. Some wiring components also have to account for moving or rotating components, such as those going to the seats or steering wheel.

Common sources for airbag wiring related issues are:

The first indication of an airbag issue should be an error light or message on the dashboard. If you suspect an airbag issue, check that this light illuminates when starting the car, to ensure it has not been tampered with. 

Airbag systems are very highly tuned to detect electrical issues, the airbag ECU constantly scans the wiring for incorrect resistance values, which indicate a break, short circuit or bad component.

Airbags are a vital safety component of any car. They protect occupants from head on, side impact and rollover accidents, the car should not be driven if an airbag issue is detected or suspected. 

Get the car to an approved mechanic, with the correct software to diagnose and check the airbag systems fully. 

Warning lights on your dashboard should not be ignored, especially ones pertaining to vital safety features such as the airbags. If you are suspecting a large repair bill, consider taking your car to a garage that offers Bumper's 

How much does it cost to repair airbag wiring?

Airbag Wire Repair Cost

In order to run correctly, your car’s ECU needs to know exactly how much air is entering the engine at any given time. This is achieved by a special sensor, known as either a mass air flow meter (MAF) or simply the air flow meter.

Air flow meters can cause numerous engine running issues when they become old, clogged or worn out. This article will explore the likely costs to replace a MAF and what symptoms to look out for.

How much is a mass air flow meter (MAF) repair?

Repairing or replacing a mass air flow meter can cost between £170 and £350, depending on the make and model of the car. Main dealership labour rates could sometimes push this figure higher still.

Typically, car models that are more premium or performance-oriented will have costlier parts prices. Certain cars, such as those with V6 or V8 engines, may even have two MAF meters.

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A mass air flow meter is a device that measures how much air is entering the engine. This information is sent to the ECU, which then tells the injectors exactly how much fuel to spray into the cylinders.

MAF meters work by heating a wire with a small amount of electricity, then monitoring how much this wire cools as more air passes it. This gives an accurate reading, without needing any moving parts, something that is very good for reliability.

A faulty MAF can cause all sorts of issues, all related to how the engine runs. These can include:

Can you drive with a mass air flow meter issue?

Whilst your car may still run, it is highly recommended to have it repaired before making unnecessary trips. Not only will poor engine running use far more fuel and cause pollution, but it is also likely to foul up spark plugs and could even destroy your catalytic converter. 

What’s more, if the ECU decides the MAF is causing too severe running issues, it may put the car into limp mode, which can be potentially dangerous depending on where it happens. 

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How much does it cost to repair a mass air flow meter?

Mass Air Flow Meter Repair Cost

The air intake on your car’s engine is a finely tuned component designed to increase efficiency by both improving the amount of air that can flow into the engine and by precisely monitoring the air volume and speed. 

Any issues with this system, such as leaks in the intake components, can negatively affect the performance of the vehicle, as well as reduce fuel efficiency.

Repairing an air intake that’s leaking can cost between £60 and £350, depending on the cause of the problem and the type of car you drive. 

Basic rubber hoses that connect the air filter to the intake manifold are often available cheaply and don’t usually take long to repair.

If the leak is coming from a cracked or otherwise damaged air intake manifold, expect to pay nearer £300+, depending on the type of car. Simple city cars and family hatchbacks will be cheaper than performance or luxury cars with complex engine bays and expensive parts. 

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There are a number of components in the air intake system, including hoses, seals and connectors that can all develop leaks over time. Here are some of the common areas:

An engine's air intake typically consists of an intake duct, usually behind the grille in the bumper, a series of tubes or hoses, an air filter, sensors, and the intake manifold. Turbocharged cars also incorporate a turbo and an intercooler. 

An engine needs both fuel and air to run. In order to run efficiently, the incoming air flow’s volume and temperature are measured precisely by the MAF (Mass Air Flow meter) and IAT (Intake Air Temp sensor). Both of these sensors are built into the air intake system. 

In addition to this, engines run better when the air is cold, as it is more dense. Intake systems therefore channel air from the front of the engine bay, near to the bumper, to avoid it being warmed by the engine. 

Will a broken air intake damage the engine?

There are few circumstances where a damaged air intake can affect your engine, the main ones are if the air filter is being bypassed, or the MAF or IAT sensors are not able to read correctly. 

An air leak after the air filter, will allow unfiltered air into the engine, which could contain dust, debris or moisture. This can damage the engine over time. If the intake is allowing unmetered air into the engine, it’s likely there will be higher air flow than the ECU thinks, potentially damaging the engine.

Can I drive with a broken air intake hose?

You should avoid driving if your air intake is leaking after the air filter, MAF and IAT sensors, as it could cause damage to the engine. 

If other parts are damaged or missing, such as the intake duct that attaches on or near to the bumper, that isn’t as much of a problem, just make sure the parts aren’t likely to fall off whilst driving. 

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How much does it cost to repair an air intake leak?

Air Intake Leak Repair Cost 2026

Air conditioning is a great but complex system, now fitted to almost all modern cars. A key component of any air conditioning system is the compressor, also known as the pump.

In this article we’ll discuss what happens when an air conditioning compressor needs replacing, including what symptoms to look out for and how much it’s likely to cost to replace. 

How much does it cost to repair an AC compressor?

Budget to pay between £250 and £630 to have an AC compressor/pump replaced. The cost will depend on the make and model of your car, as well as if other items need doing at the same time. 

In general, luxury cra brands such as Mercedes and BMW cost more than less expensive cars such as those made by Ford, Vauxhall etc. However an even bigger factor is where you have the work done, as main dealer garages will typically charge a much higher hourly rate for labour.

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What does an air conditioning compressor do?

Any air conditioning system works on the principle of condensing and then evaporating a refrigerant. In order to do this and remove heat energy, a compressor is needed to increase the pressure in the system.

In a typical AC system, the refrigerant moves to the compressor after leaving the evaporator coil inside the car (and passing through an expansion valve), where it has absorbed heat energy. 

After the refrigerant is compressed, it condenses in the AC condenser unit in the engine bay, releasing heat to the atmosphere.

AC compressors are generally driven from the engine via the auxiliary belt, often sitting near the alternator and power steering pump (if fitted).

The first thing you’re likely to notice with any AC issue is the lack of cold air from the vents, this can be a symptom of a bad AC compressor, but could be caused by a number of other things, such as:

How long does it take to replace an air conditioning compressor?

In most cars, an AC compressor can be replaced within a day, this does assume that the garage has diagnosed and bought in the new part in advance, or the part is readily available. 

Depending how busy and/or well organised the garage is, expect to leave your car for 1-3 days on average. 

Some cars, particularly sports or high end cars, can take more time to repair, as there may be other components in the way. 

What causes air conditioning compressors to fail?

Whilst relatively simple components, AC compressors are running at high pressure, heat and RPM all the time the air conditioning is being used. They are also sometimes subject to water ingress and road dirt that can affect seals and bearings. 

Typically there a three failure modes for the average car air conditioning compressor:

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How much is a car AC compressor repair?

AC Compressor Repair Cost 2026

Air conditioning systems use a refrigerant to move heat from the inside of the car to the outside. To do this, the system needs to be sealed, keeping all the gas inside. In this article, we’ll discuss possible causes of AC gas leaks and how much they cost to repair. 

How much does it cost to repair an AC gas leak?

Repairing an AC leak can cost between £120 and £550+, depending on the cause of the leak. In some cases, a simple seal or o-ring needs to be replaced; other causes, however, could require a new AC compressor, radiator or coil.

With how complex an AC system is, it’s very hard to tell without diagnostics where the leak is coming from. In many cases, it can take an hour or so of labour to find the source, before repairing it can begin.

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The air conditioning in your car uses a closed-loop system with a pressurised refrigerant. The smallest of pinholes or cracks in any one of the components can cause the gas to escape. 

Some common locations for AC gas leaks include:

Car air conditioning systems use a sealed loop of refrigerant to remove heat energy from the interior of the vehicle. They do this by continually condensing and then evaporating the refrigerant, forcing it between a liquid and gaseous state.

Without sufficient pressure in the system, the pump cannot do its job of turning the refrigerant from a gas to a liquid, thus preventing any cold air from being created. 

Repairing an AC system can take anything from a few hours to a week or more. Initially the mechanic will need to take some time to find the source of the issue. Certain parts, such as the evaporator coil behind the dash, can take two solid days of work, or more, to repair. 

Other problems such as needing replacement AC hose or valves, can be done in an afternoon, providing the parts are easy to access, and new parts availability is good.

If your car’s AC system has a leak, it is actually illegal to re-gas it. This is because the refrigerant used is a very potent greenhouse gas. For this reason you should only regas an AC system when all known faults have been fixed, and the system has been leak tested. 

 allows you to spread the cost of car repairs, anything from minor AC fixes to engine rebuilds. 

, and have your car fixed with easy to manage monthly payments. 

How much does it cost to repair an AC leak?

AC Gas Leak Repair Cost 2026

Obviously, an accelerator cable is an essential component to driving any car, but a cable that is faulty or sticky can be extremely dangerous. In this article, we take a look at the potential causes for a faulty accelerator cable and how much it’s likely to cost. 

Repairing or replacing an accelerator cable should typically cost between £230 and £450, depending on the cost of the parts and how difficult the job is to complete. 

Often, premium brands such as BMW, Mercedes and others have higher parts costs than brands like Ford and Vauxhall.

However, most modern cars don’t have a physical accelerator cable and instead use a drive-by-wire system with an accelerator position sensor, more on this below.

Replacing an accelerator position sensor typically costs between £100 and £300, depending on the make and model of the vehicle. Labour times are generally low, as the part is usually easy to access. 

Things that can affect the cost to repair an accelerator position sensor include:

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Petrol and diesel cars both use a valve to control the amount of fuel and air entering the engine, to enable control of this from the driving seat, a cable is connected to the accelerator pedal. 

Visually, accelerator cables are similar to those of brake or gear cables on a bicycle; they comprise a thin metal wire, encased in a firm but flexible outer housing.

Almost all modern cars don’t actually use a physical accelerator cable, but utilise an electronic system, consisting of a throttle position sensor attached to the pedal inside the car, and an actuator in the engine bay that opens and closes the throttle.

Electronic controls such as this are often referred to as “drive-by-wire” systems, and are used for many reasons, including ease of install, cost, and enabling features such as traction control and cruise control to be added.

Symptoms of a failing accelerator cable or pedal

Accelerator cables tend to either break, or become stiff/sticky. The former will be evident if the pedal no longer affects the engine RPM, and feels very light. 

A sticking accelerator cable can be extremely dangerous, a key indicator this is happening is if the pedal does not spring back to its original position. 

Symptoms of a broken or faulty accelerator position sensor can be harder to pinpoint, as they can cause anything from erratic acceleration to causing the car to not start at all.

Can you use your car with a faulty accelerator pedal sensor, or cable?

No, any issues with key controls such as this render the car undrivable until they are fixed. Regardless of how it fails, a faulty accelerator cable can cause a loss of control or a serious accident. 

If your car needs urgent work, you can split the cost with Bumper's 

. Available from hundreds of garages nationwide, it allows you to get the repairs you need within your monthly budget.

Joseph Law

Bumper Content Writer