In this article we will try to help you resolve a issue that can be annoying, and if not handled in time become a financial drain. In reality, distinguishing a leak on your car is never reassuring, and it is even less calming when it’s a gearbox leak on your BMW 3 Series . In this article, we’re going to help you ensure that it’s in fact a gearbox leak, then, how to fix a gearbox or transmission leak, then, give you some prevention suggestions, and, at last, give you an idea of the price of the gearbox of a BMW 3 Series.
Gearbox leak on BMW 3 Series, source and symptom
If you have identified an oil stain on the ground, you will need to validate that this leak is in fact caused by the gearbox of your BMW 3 Series. To achieve this, you will need to go under your car and follow the oil leak. If it is transmission oil, it must be caused by your gearbox sump or an adjacent room. Once established, here are the possible sources of this transmission leak:
- A gearbox cap: If it’s improperly screwed on…
- Defective torque converter: Only present on automatic gearboxes.
- From the transmission oil sump: In the event that it is cracked or damaged
- One of your seals damaged
How to repair a gearbox leak on BMW 3 Series?
After discovering the different sources of a gearbox or transmission oil leak on your BMW 3 Series, we will try to explain to you what are your options to fix this oil leak. Take note that in any case, after having distinguished a leak, you must go to a mechanic to distinguish the exact source of the leak, otherwise your gearbox might be irreparably damaged. Nevertheless, here is how the service of the mechanic and the solutions that will be offered to you:
- Very often to distinguish the leak, the auto mechanic will have to take apart your gearbox, which will involve a high labour cost.
- If you’re lucky and it’s just a gasket, your auto mechanic will replace it and reassemble the gearbox of your BMW 3 Series, otherwise you’ll have to replace the whole gearbox
- Finally, for the do-it-yourselfers, it is possible to use a sealing kit which is just effective in the case of small leaks, this kit is worth around 40 euros
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Prevention: How to avoid gearbox leaks on your BMW 3 Series?
There aren’t many alternatives to avoid gearbox leaks on your BMW 3 Series , nevertheless here are the three most effective:
- Regular oil changes on your gearbox deck.
- Drain your gearbox and put new oil in it. If you want to know everything about this action, please go through our content on this subject.
- Use a specific additive for routine service of gearbox seals, these additives will restore flexibility and allow to plug slight leaks, you will discover some for a few dozen euros at Oscaro.
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Price of a BMW 3 Series gearbox
Finally, we would like to give you an idea of how much it costs to replace the gearbox of a BMW 3 Series. As you have understood, gearbox problems generally lead to a whole replace of this part. It is difficult to give you a precise price because based on the mechanic the labour can vary a lot and based on your engine the part will as well have a different price, nevertheless, we estimate that the repair, labour included will cost you between 800 and 2000 euros , knowing that the part alone costs between 400 and 1000 euros.
If you need more guides on the BMW 3 Series, go to our BMW 3 Series category.
