Launched in 2012, the Kia K900 marked the Korean manufacturer's entry into the prestigious large luxury saloon segment. A refined interior, a powerful engine, and premium equipment: it has everything you'd expect from an exceptional grand tourer. But even the most carefully engineered mechanicals age, and the gearbox in your Kia may, one day, need attention. EDEN BOITES is here to help.
Gearboxes fitted to the Kia K900
True to its luxury saloon calling, the K900 prioritises the comfort of automatic transmission. It is offered primarily with two gearbox options:
- the 8-speed automatic gearbox, the standard transmission, which strikes a good balance between performance and fuel efficiency;
- the 10-speed automatic gearbox, introduced as an evolution, whose wider ratio spread optimises both driving pleasure and energy efficiency.
Manual gearboxes are absent from this type of model, where refinement of the driving experience takes precedence. To understand what sets these systems apart, our guide on the differences between a manual and automatic gearbox is well worth a read.
Spotting a transmission fault
In a saloon as hushed as this, even the slightest change in behaviour should raise the alarm. Watch out for:
- resistance, vibrations or a delay when engaging gears;
- unusual noises, grinding or clunking, while driving;
- transmission fluid spots on the ground, indicating a leak;
- engine overheating or the transmission warning light illuminating on the dashboard.
If you notice any of these signs, it is vital to act quickly to avoid more serious damage.
Repairing the K900's gearbox
Restoring a gearbox as sophisticated as this requires specialist expertise. Following a thorough diagnosis, the professional sources the appropriate parts, strips the gearbox by removing the necessary components, then replaces any faulty elements — seals, bushes, synchronisers or gears. The transmission is then refitted to the manufacturer's specifications, before a full test and fluid level check. On this type of vehicle, precision throughout the process is paramount.
Preventing wear on an automatic gearbox
The longevity of an automatic transmission depends largely on the quality of its maintenance. On the K900, make sure you follow the recommended fluid change intervals and use only the specified fluid, as degraded lubricant loses its properties and causes the transmission to overheat. Allow the gearbox to reach operating temperature before pushing the engine hard, and avoid switching abruptly between drive and reverse. Regular checks by a professional will also help identify a leak or a faulty sensor before it affects the smooth, refined driving experience that defines this saloon.
Which replacement solution should you choose?
When repair is no longer a viable option, several routes are available. An exchange gearbox, assembled with original parts and rigorously tested, is perfectly suited to a saloon used regularly, particularly on long journeys. Reconditioning, which rebuilds your own gearbox using original components, is the right choice when the reference you need is difficult to source. In all cases, compatibility with your engine remains the priority: on the K900, the electronics associated with the transmission make this check essential. Our advisers will help you identify the correct reference before you make any decision.
To compare with other models, our guides on the Kia Forte and the Kia Cerato provide useful additional reference points.
Frequently asked questions
Can a luxury automatic gearbox actually be repaired?
Yes, in many cases. A leak, a seal or a synchroniser can all be addressed. Only severe internal damage makes a full replacement necessary.
The transmission warning light is on — can I keep driving?
It is best to stop and have the vehicle diagnosed. This warning light signals a fault that should not be left unattended.
Should the fitting be entrusted to a professional?
Absolutely. Removing and setting up an automatic gearbox involves numerous sensitive steps that require a properly equipped workshop.
How do I find the exact reference for my gearbox?
It is stamped on the transmission. Pass it on to our advisers, who will confirm compatibility with your K900 before any purchase is made.
Why choose EDEN BOITES?
EDEN BOITES strips, tests and rebuilds every Kia gearbox using original components. Our exchange gearboxes are covered by a warranty of up to 24 months and can be paid for in instalments — in up to 10 instalments if you wish. Delivery is available throughout France and the European Union, with lead times confirmed on quote, and every exchange gearbox comes with a satisfaction-or-money-back guarantee, subject to our Terms and Conditions. Request your personalised quote for your K900.
