Audi A5 — service and repair in Espoo

The first-generation Audi A5 appeared in 2007 and marked Audi’s return to the midsize coupe segment. Later the range was expanded with the five-door Sportback and Cabriolet.

The first generation is usually designated as A5 8T. It is technically related to the Audi A4 B8 and uses a longitudinal engine layout.

The second-generation A5 appeared in 2016. It received the F5 designation, a new platform, a lighter body, modern electronics and updated TFSI and TDI engines.

In 2024 Audi changed the model range structure and introduced a new A5 as the successor to the A4 family with internal-combustion engines. When searching for information on the current A5, the model year is especially important.

When repairing, it is always necessary to identify the exact generation, engine, gearbox and drive system from the VIN. Main generations:

The first A5 is still widely represented on the Finnish used market. Cars from this period may have 1.8 TFSI, 2.0 TFSI, V6 FSI/TFSI, 2.0 TDI, 2.7 TDI, 3.0 TDI, a manual gearbox, Multitronic on selected front-wheel-drive versions, S tronic, Tiptronic and quattro.

On an ageing A5 it is especially worth checking:

The second-generation A5 received more modern engines and electronic architecture. The car became more technologically advanced, so when a fault appears it is important to carry out a full scan of control units rather than limiting diagnostics to the engine alone.

The most common service focus areas:

In the new generation Audi uses the A5 name for the model line that replaced the previous A4 with internal-combustion engines. This means the new A5 differs substantially from A5 Coupe and Sportback models of earlier years.

Parts and repair procedures from the previous A5 cannot therefore be applied automatically to the new model. For servicing it is especially important to consider:

Audi A5 is often fitted with more powerful engines than compact Audi models, and many cars have quattro and an automatic gearbox.

In Finland, cold starts, winter road salt and large temperature swings create extra load. Even a car with low annual mileage should ideally be checked every year. Items worth checking regularly include:

Petrol turbocharged TFSI engines were widely used on the A5. On the used market you often see 1.8 TFSI, 2.0 TFSI and 3.0 TFSI on powerful versions.

For TFSI it is especially important to monitor oil consumption, crankcase ventilation, the turbocharger, spark plugs, coils, the cooling system and the timing drive. Book diagnostics if:

Some first-generation petrol TFSI engines may have elevated engine oil consumption. However, the engine should not be assessed by the 1.8 or 2.0 TFSI name alone: there are different generations and revisions of these engines.

Constantly topping up oil without diagnosing the cause is not advisable. If oil consumption has become high, check:

Many petrol engines on the A5 use a timing chain. The problem may relate to the chain, tensioner or variable valve timing mechanism.

If the chain jumps, serious engine damage is possible. A pronounced metallic noise on start-up should therefore not be ignored. On older cars, reasons for diagnostics include:

Audi A5 was widely offered with diesel engines. On the used market 2.0 TDI, 2.7 TDI and 3.0 TDI are common.

Diesel suits long motorway mileage well, but with city use the exhaust aftertreatment system and EGR need attention. Book diagnostics if:

The DPF particulate filter gradually accumulates soot and ash. Soot can burn off during regeneration, while ash remains in the filter.

If the engine produces excessive soot, cleaning the DPF without fixing the cause will only give a temporary result. During diagnostics it is worth checking calculated soot load, ash quantity, differential pressure, temperature sensors, EGR operation and injector condition.

Signs of a problem:

The EGR system can become contaminated over time. On some diesel engines the EGR cooler should also be checked, especially if coolant level is dropping at the same time.

Possible symptoms:

Modern diesel A5 models use SCR and AdBlue. A fault may relate to more than just a low fluid level.

If a message appears that the engine cannot be started again after a certain distance, diagnostics must not be postponed. Possible causes:

Audi A5 is widely fitted with the dual-clutch S tronic gearbox. Different generations may use different transmission versions. During diagnostics the exact gearbox code must be identified.

If regular oil changes are specified for a particular S tronic, they must be carried out as scheduled. Book service if:

Some powerful A5 versions, S5 models and cars with certain all-wheel-drive types use Tiptronic. This is a classic automatic gearbox with a torque converter.

It differs from S tronic and requires a different diagnostic approach. On a high-mileage car, transmission fluid condition and service history should be considered. Reasons to check include:

Some early front-wheel-drive Audi A5 models were fitted with the Multitronic CVT. It differs substantially from S tronic and Tiptronic in design.

When buying such a car, service history is especially important. Multitronic requires the correct fluid and service procedure. Signs of a possible problem:

Quattro all-wheel drive is very common on the Audi A5. On cars with a longitudinal engine layout the design differs from compact A1/A3 models.

Depending on the generation, either classic permanent all-wheel drive or the more modern quattro ultra system is used. For quattro it is advisable to use tyres of the same size and similar wear.

Transmission fluids, the propshaft, differentials, CV joints and electronic control should be monitored. Diagnostics are needed if:

An all-wheel-drive A5 has additional transmission components. Similar vibration can come from the wheels or driveshafts, so the source must be identified before repair.

Possible signs of a fault:

Audi A5 uses a complex multilink suspension designed to combine handling and comfort. On cars with large wheels and low-profile tyres suspension loads are higher.

Before wheel alignment, mechanical play must be eliminated first. Diagnostics are recommended if:

Some A5 models are fitted with electronically adjustable suspension. If the car changes stiffness depending on driving mode, the condition of electronic dampers and sensors must be considered.

Before replacing a damper it is worth checking the wiring and stored faults. Signs of a problem:

The main symptom of a worn hub bearing is a hum that increases with speed. On quattro such a sound can sometimes be hard to distinguish from transmission noise.

Before replacement it is necessary to identify the exact wheel or component creating the noise.

The A5 may have a fairly powerful engine and considerable weight, so brake condition is especially important. In Finland, road salt promotes corrosion of discs and mechanisms.

For S5 and RS 5, brake component costs are noticeably higher, so their condition is especially important to assess before purchase. Book an inspection if:

The TFSI and TDI cooling system includes a large number of plastic housings, pumps, valves and heat exchangers.

If coolant level is gradually dropping, the cause must be found. Regular topping up alone is not enough. Fluid loss may come from:

A modern A5 has a large number of control units. It is especially important to check the battery before a Finnish winter.

After replacement, some versions require registration of the new battery in the vehicle energy management system. A weak battery can cause:

The MMI multimedia system is an important part of the A5. Before replacing the MMI unit, check the power supply, fuses and diagnostic faults.

Depending on the generation, problems may appear as:

A modern Audi A5 may be fitted with adaptive cruise control, Audi pre sense, Lane Assist, blind-spot monitoring, cameras and parking sensors.

Systems may temporarily switch off because of snow or dirt. If a fault remains after cleaning the sensors, diagnostics are needed. After windscreen replacement, suspension repair or body repair, some systems may require calibration.

The A5 often uses multi-zone climate control. Causes can include refrigerant leak, compressor, valve, sensor or flap actuator.

Inspection is needed if:

Sportback is one of the most practical A5 variants. The five-door body and large tailgate allow the car to be used almost like an estate while keeping a sporty profile.

If water appears in the spare-wheel well, the source of the leak must be found. It is also worth monitoring:

The A5 Cabriolet requires additional checks of the folding roof. Blocked drains can lead to water entering the cabin and damaging electronics.

The roof mechanism, hydraulics or electric drive, position sensors, seals and drains must be monitored. Diagnostics are needed if:

The S5 is the higher-performance version of the family. Depending on the generation, various powerful powertrains were used.

It is also important to consider possible chip tuning. If the car was used with increased power, load on the gearbox and engine may have been substantially higher than factory levels.

S5 servicing requires extra attention to:

The RS 5 is the most powerful version of the A5 family. The cost of a mistake when buying an RS 5 is substantially higher than with a regular A5 2.0 TFSI.

Such a car requires especially thorough diagnostics before purchase. Worth checking:

Before buying a used Audi A5, a comprehensive inspection is recommended.

For a Cabriolet, the roof mechanism and absence of water in the cabin should be checked additionally. For S5 and RS 5 it is especially important to establish whether previous tuning was carried out.

Worth checking:

At Volkkarihuolto Espoo you can book:

Book diagnostics if:

Need Audi A5 repair or servicing? Contact Volkkarihuolto Espoo at Ruukinmestarintie 7, 02330 Espoo.

We can diagnose petrol TFSI and diesel TDI engines, S tronic, Tiptronic, Multitronic, quattro, DPF, EGR, AdBlue, turbocharging, the timing drive, brakes, suspension, the cooling system, MMI and other electronic equipment.

When servicing an Audi A5 it is especially important to consider the generation and exact technical configuration. An early A5 2.0 TFSI, a diesel A5 3.0 TDI quattro and the new-generation A5 have substantially different designs and require different approaches to diagnostics and preventive repair.