What each repair involves on the A4 / S4, and what our invoices say it costs
Gearbox oil changes on the Audi A4 / S4
21% of the A4 / S4 registrations in our records had at least one invoice involving this work (37 of 176, 46 invoices in all). Those visits typically cost about $800 (middle half $600 to $1,400, 44 priced visits since 2023, whole invoice including GST).
Gearbox oil lubricates moving parts and carries hydraulic pressure for smooth shifts. Worn or contaminated fluid can show up as hesitant changes, shuddering or harsh engagement. Leaving it can increase heat and wear inside the gearbox.
We read gearbox data with ODIS, check the fluid condition and inspect for leaks before deciding whether the car needs a fluid service or a targeted fault repair. We document the evidence and provide an honest quote before work starts.
More on this repair at 1 Car
Aircon compressor faults on the Audi A4 / S4
19% of the A4 / S4 registrations in our records had at least one invoice involving this work (34 of 176, 34 invoices in all). Those visits typically cost about $950 (middle half $850 to $1,400, 29 priced visits since 2023, whole invoice including GST).
The compressor moves refrigerant through the aircon system so the cabin can cool. A failing compressor may cause warm air, intermittent cooling or unusual noise when the aircon runs. Continued use can spread debris and damage related aircon parts.
We use ODIS commands alongside pressure, temperature and leak checks to confirm whether the compressor or a related control part is at fault. The test results are documented, and you receive an honest quote before work starts.
This aircon repair is covered by a warranty of at least 6 months.
More on this repair at 1 Car
Spark plugs and ignition coils on the Audi A4 / S4
16% of the A4 / S4 registrations in our records had at least one invoice involving this work (29 of 176, 35 invoices in all). Those visits typically cost about $950 (middle half $750 to $2,050, 30 priced visits since 2023, whole invoice including GST).
Spark plugs ignite the fuel mixture, while ignition coils provide the voltage they need. A fault can cause rough running, hesitation, poor response or an engine warning light. Unburnt fuel can overheat exhaust components and turn a focused repair into broader damage.
We read misfire data through ODIS, inspect the plugs and test the coils under load. This identifies the affected parts, with documented findings and an honest quote before work starts.
Cooling-system repairs on the Audi A4 / S4
15% of the A4 / S4 registrations in our records had at least one invoice involving this work (27 of 176, 30 invoices in all). Those visits typically cost about $1,750 (middle half $1,100 to $2,950, 26 priced visits since 2023, whole invoice including GST).
The water pump circulates coolant, the thermostat controls its flow and the radiator releases heat. A leak or failed part may cause a coolant warning, visible staining, a sweet smell or rising engine temperature. Coolant loss can lead to overheating and serious engine damage.
We pressure-test the system, review ODIS temperature data and use dye when needed, tracing any leak from the highest wet point. We replace the pump, thermostat, radiator, hose or seal identified by the evidence, then document it and quote honestly before work starts.
More on this repair at 1 Car
Suspension repairs on the Audi A4 / S4
12% of the A4 / S4 registrations in our records had at least one invoice involving this work (21 of 176, 22 invoices in all). Those visits typically cost about $2,900 (middle half $2,150 to $4,300, 19 priced visits since 2023, whole invoice including GST).
Suspension parts control wheel movement and keep the tyres planted on the road. Wear may cause knocking, loose steering, uneven tyre wear or a harsh ride. Delaying repairs can affect handling and place extra strain on nearby joints and tyres.
We road-test the car, inspect mountings and joints for play, and check ODIS for relevant chassis faults. We identify the worn absorber, arm, bush or link, record the findings and give you an honest quote before work starts.
More on this repair at 1 Car
Brake pads, discs and wear sensors on the Audi A4 / S4
11% of the A4 / S4 registrations in our records had at least one invoice involving this work (20 of 176, 22 invoices in all). Those visits typically cost about $1,950 (middle half $1,000 to $2,550, 19 priced visits since 2023, whole invoice including GST).
Brake pads press against the discs to slow the car, while wear sensors alert you when attention is due. Squealing, vibration, reduced braking response or a dashboard warning can signal a problem. Waiting can damage the discs or calipers and reduce braking performance.
We measure the pad material and disc condition, inspect the calipers and sensors, and verify relevant warnings with ODIS. We specify only the worn brake parts, document every measurement and present an honest quote before work starts.
More on this repair at 1 Car
Battery replacement on the Audi A4 / S4
11% of the A4 / S4 registrations in our records had at least one invoice involving this work (19 of 176, 19 invoices in all). Those visits typically cost about $1,050 (middle half $550 to $2,350, 18 priced visits since 2023, whole invoice including GST).
The battery starts the engine and helps keep the car's electrical supply stable. Slow cranking, repeated warning messages or unavailable electrical functions can point to low battery health. Weak voltage can strain the starting and charging systems while creating misleading electronic faults.
We perform battery-health and charging-system tests, then check ODIS energy data and registration status. Replacement is recommended only when testing supports it, with the readings documented and an honest quote provided before work starts.
More on this repair at 1 Car
Oil leak repairs on the Audi A4 / S4
10% of the A4 / S4 registrations in our records had at least one invoice involving this work (17 of 176, 18 invoices in all). Those visits typically cost about $2,700 (middle half $1,150 to $4,200, 17 priced visits since 2023, whole invoice including GST).
Engine oil forms a protective film between moving parts. A leak may leave spots under the car, create a burning smell or cause visible smoke and a low-level warning. Letting the oil level fall can damage the engine, while escaping oil may harm nearby belts and hoses.
We clean the suspect area, trace oil from the highest wet point and use dye where needed, while reviewing relevant ODIS warning data. We pinpoint the leaking gasket, seal, cover or housing, document the source and issue an honest quote before work starts.
More on this repair at 1 Car
Sensor, switch and control-module faults on the Audi A4 / S4
8% of the A4 / S4 registrations in our records had at least one invoice involving this work (14 of 176, 15 invoices in all). Those visits typically cost about $1,650 (middle half $1,000 to $4,450, 13 priced visits since 2023, whole invoice including GST).
Sensors report operating conditions, switches send commands and control modules coordinate vehicle functions. A fault may cause warning lights, intermittent features, battery drain or unexpected behaviour. Replacing parts without testing can leave the real cause untouched and introduce further faults.
We run a full ODIS scan, study live data and perform wiring, voltage or actuation tests as the fault requires. We repair the proven sensor, switch, wiring fault or module, then share documented evidence and an honest quote before work starts.
Wheel bearing and hub repairs on the Audi A4 / S4
6% of the A4 / S4 registrations in our records had at least one invoice involving this work (10 of 176, 11 invoices in all). Those visits typically cost about $750 (middle half $550 to $1,050, 10 priced visits since 2023, whole invoice including GST).
A wheel bearing supports the hub and lets the wheel rotate smoothly. Wear can produce humming or growling that changes with road speed or steering load, sometimes with vibration or wheel play. Continued driving can affect the tyre, hub and nearby braking or wheel-speed components.
We road-test for load-related noise, check the raised wheel for play and roughness, and compare ODIS wheel-speed data where relevant. We confirm whether the bearing or hub needs replacement, document the result and give you an honest quote before work starts.
