In 2014, BMW surprised the automotive world by launching the unclassifiable BMW i8, a futuristic 2+2 coupe with the aim of being as aerodynamic as possible. And with good reason: the little "i" in the car's name indicates that it's a plug-in hybrid.
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Gearbox broken? We help you identify and order your model
Fortunately, there are solutions available. How do you repair the gearbox on a BMW i8? EDEN BOITES has the answers!
Back to the description of the BMW i8 engine and gearbox
The BMW i8's petrol engine is located in the rear mid-engine position, a unique technical feature. Another striking feature of this engine is its compact, lightweight 1.5-liter 3-cylinder design, delivering 231 hp and maximum torque of 320 Nm. Power is transmitted to both wheels via a 6-speed automatic gearbox.
And if that's not enough, an auxiliary 131 hp electric motor is also available. With a maximum torque of 250 Nm, it acts almost from start-up to drive the front wheels, thanks to a 2-speed automatic gearbox. The combined power of the two motors is 362 hp, and the 0 to 100 km/h time is 4.2 seconds.
How can I tell if the gearbox on a BMW i8 is malfunctioning?
If there's a problem, the gearbox in your BMW i8 will let you know. So it's important to recognize the symptoms of malfunction it may be sending you.
First of all, when the Check-Engine light comes on, it indicates a problem with the engine components or with the general operation of the vehicle.
Then there are symptoms specific to automatic transmission malfunction, usually appearing simultaneously. Here are the most common:
- Strange grinding-like noises: this may be caused by metal-to-metal friction between gear parts;
- A gearshift that jumps automatically: this problem can cause serious engine damage;
- Hesitations when changing gears: the gears have difficulty locking and the gearshift struggles to get into the right position;
- Burning smells: these are generally due to contamination of the gearbox oil, which can lead to leaks and the appearance of black spots in the fluid.
Repairing the gearbox on a BMW i8
The automatic transmission is a complex system, especially when it comes to a hybrid car with 2 engines. That's why you need to have your BMW i8's gearbox repaired by a professional, as soon as you notice the slightest sign of failure. The expert will then follow two essential steps to solve the problem.
1. Troubleshooting the gearbox on a BMW i8
To pinpoint the source of the problem, the expert uses a diagnostic scanner, which detects error codes and sensor faults. He also carries out pressure tests to check that the transmission is operating correctly. In some cases, he may have to dismantle the automatic gear box to identify the cause of the fault.
2. Repairing the gearbox on a BMW i8
Depending on the diagnosis of the fault, the mechanic may decide to replace certain defective gearbox components (clutches, seals, solenoids, etc.). Transmission fluid can also be changed. New oil should be suitable for an automatic gearbox, and of a viscosity in line with the manufacturer's instructions.
Finally, the mechanic adjusts the transmission pressure and, consequently, the pressure regulatingvalves.
When to change the gearbox on the BMW i8?
This decision depends on a number of parameters, and requires expertise as well as a detailed inspection of the transmission. For this reason, it can only be made by an expert with the right tools.
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