What each repair involves on the S90, when to inspect or replace, and what our invoices say it costs
The figures are from our invoices. Scheduled maintenance follows the requirements for your car's engine, gearbox and model year; other repairs are assessed from symptoms, inspection and diagnostic results rather than a universal age or mileage. The notes under each repair are general guidance for cars driven in Singapore, not statistics.
Aircon cooling coil repairs on the S90
This is among the repair work our S90 invoices record most often. On the bill, this item typically came to about $1,350 (middle half $1,300 to $1,700, GST included; other work on the same bill is not counted).
The evaporator absorbs heat from cabin air so the aircon can blow cold. A leak may cause weak cooling, musty smells or mist from the vents. Waiting can make the compressor work harder and allow moisture into the system, increasing the repair scope.
We read the climate system with VIDA, pressure-test the circuit and use dye to trace any leak. We document the finding and give you an honest quote for the failed part before work starts.
When repair may be needed: Coil replacement follows a confirmed leak or blockage found on a pressure or dye test, not age. Reduced cooling has several possible causes, so the coil is condemned only once the test points to it.
Maintenance and early warning signs: Change the cabin filter on schedule and keep the aircon drain clear. Owners often tell us about a musty smell at start-up; in our experience it comes from the coil staying wet after the engine is cut, and basement parking makes it worse. Switching the compressor off shortly before you park and letting the fan run until the air is no longer cold helps the coil dry out. Early signs: that smell, water in the passenger footwell, cooling that fades over weeks.
This aircon repair is covered by a warranty of at least 6 months.
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Battery replacement on the S90
This is among the repair work our S90 invoices record most often. On the bill, this item typically came to about $400 (middle half $400 to $600, GST included; other work on the same bill is not counted).
The battery supplies power for starting and supports the car's electrical systems. A weak battery may cause slow cranking, warning messages or electronics that behave oddly. Leaving it can trigger further electrical faults and place extra strain on the charging system.
We combine a VIDA fault scan with a battery load test and charging-system test. If the battery is the cause, we replace and register it, document the readings and give you an honest quote before work starts.
When to inspect or replace: The starter battery is tested at every service and replaced on the test result rather than at a set age. Cars with a separate auxiliary battery for the stop-start system or the electronics have that battery tested and replaced the same way, and it is counted in this row. Hybrid drive batteries are a separate matter.
Maintenance and early warning signs: Short trips and daily aircon use are hard on a battery in Singapore; give the car a longer run where you can, switch accessories off before the engine, and park in shade. Early signs: slow cranking, lights dimming at idle, stop-start no longer working, a warning about the auxiliary battery, electrical warnings that come and go.
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Gearbox oil changes on the S90
This is among the repair work our S90 invoices record most often. On the bill, this item typically came to about $250 (GST included; other work on the same bill is not counted).
Gearbox oil lubricates, cools and carries hydraulic pressure inside the transmission. Worn or contaminated fluid may show up as hesitant changes, shuddering or noise. Leaving it can accelerate internal wear and turn maintenance into a deeper repair.
We review VIDA transmission data, inspect the fluid condition and check for leaks before carrying out a road test. We recommend the correct oil service only when the evidence supports it, document the checks and confirm an honest quote before work starts.
Service interval: Follow the interval and fluid specification for your gearbox and model year; they differ between gearbox types even within one model, and we confirm them for your car. Where the maker lists no change for the life of the car, ask us whether a preventive change makes sense for your gearbox and driving.
Maintenance and early warning signs: Use the specified fluid and fill procedure, with the filter where your gearbox has a serviceable one, and avoid hard launches while the gearbox is cold. Fresh fluid is maintenance, not a cure for a gearbox that is already faulty. Early signs: a burnt smell, dark fluid, shifts that have become rough.
More on this repair at 1 Car
Spark plug and ignition coil repairs on the S90
This is among the repair work our S90 invoices record most often. On the bill, this item typically came to about $200 (GST included; other work on the same bill is not counted).
Spark plugs ignite the mixture, while ignition coils provide the voltage they need. A fault may cause a rough idle, hesitation, poor response or an engine warning light. Continued misfiring can harm the catalytic converter and place extra strain on related parts.
We use VIDA misfire data, inspect the plugs and coils, and perform a swap test where appropriate. We replace only the affected components, record what we found and provide an honest quote before work starts.
Service interval: Spark plugs have a scheduled interval that depends on the engine and plug type, and we confirm it for your car. Ignition coils are replaced on diagnosis, not on a schedule, and a misfire does not by itself mean a coil has failed.
Maintenance and early warning signs: Keep to the plug interval and have misfires checked early, because unburnt fuel can damage the catalytic converter. Early signs: rough idle, hesitation, a flashing engine light.
Brake hydraulic and ABS repairs on the S90
This is among the repair work our S90 invoices record most often. On the bill, this item typically came to about $600 (middle half $500 to $750, GST included; other work on the same bill is not counted).
The calipers apply the pads, hoses carry brake pressure, and the ABS pump and sensors help maintain controlled braking. A driver may notice pulling, a soft pedal, a hot wheel, uneven braking or an ABS warning. Waiting can worsen pad and disc wear or reduce braking confidence.
We scan the ABS system with VIDA, compare wheel-speed signals and inspect hydraulic pressure. We identify whether the fault sits with a sensor, hose, caliper or pump, document it and set out an honest quote before work starts.
When to inspect or replace: Calipers, hoses and ABS parts are diagnosed and replaced on a confirmed fault. Brake fluid is changed on the time schedule for your car, because it absorbs moisture.
Maintenance and early warning signs: Change brake fluid on schedule, have the caliper sliders serviced at pad changes, and act on a pulling or dragging brake at once. Early signs: a soft or long pedal, pulling to one side, a hot wheel after driving, an ABS warning.
Repair cost moves with access, part choice, fault severity and any related damage uncovered during diagnosis. The statistic shown for each repair is a useful guide, not a quote for your S90. We inspect the car and confirm the price before work starts.
