Sylvie Willis
The Mini Cooper is a unique and delightful car, but what do you do if your fuel filler flap won't unlock? It turns out there are a few different ways to manually open the fuel tank in a Mini Cooper. One way is to locate the access panel inside the boot, remove it, and slide a small white lever towards the rear of the car to manually unlock the filler flap. Another method is to use a small screwdriver to press and release the clips behind the filler door, or to drill two small holes where the dimples are in the ring and insert a screwdriver to pop the clips free. If you're looking to replace the chrome cap on an S model Mini Cooper, you can simply open the door and press in with a small screwdriver to release the tab.
| Characteristics | Values |
|---|---|
| Fuel tank capacity | 11.6 gallons |
| Driving range | 382 miles |
| Engine | 1.5-liter TwinPower Turbo 3-Cylinder |
| Horsepower | 134 |
| Method to open the fuel tank | Manual release or automatic release |
| Steps to manually open the fuel tank | Open the boot, remove the access panel on the left, slide the white lever towards the rear of the car |
| Steps to open the fuel tank with a manual release | Jack the right rear lift point, unclip the upper portion of the splash guard, access the body panel cavity to unmount and loosen the assembly |
| Steps to replace the fuel door | Open the door, press in with a small screwdriver and release the tab, undo the inner plastic fender, get access to the inside of the fender and the fuel filler neck, remove the stock gas lid, unbolt the fuel filler neck, replace the chrome cap |
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What You'll Learn
Manually opening the fuel filler flap
If your Mini Cooper's fuel filler flap won't unlock, there are a few methods you can try to manually open it.
Firstly, check if your Mini Cooper has a manual release for the fuel door. The fuelling compartment is located in the right rear body panel cavity and is not accessible from the trunk area. If you do have a manual release, you can use a jack to lift the right rear lift point and then unclip the upper portion of the splash guard. This will give you access to the body panel cavity, where you can unmount and loosen the assembly (fuelling compartment and door) from the body panel. Ensure that the fuel hoses remain attached during this process.
Another method involves accessing the inside of the boot and locating the access panel on the left, where you usually keep your tools or first aid kit. Remove this access panel, and you should see a small white lever set quite far into the body. By sliding this lever towards the rear of the car, you can manually unlock the filler flap.
If you need to replace the fuel door, the process is relatively straightforward. First, open the door and use a small screwdriver to press in and release the tab. The chrome part should come off easily. If you are replacing it with a different type of cap, you can skip this step. Next, remove the stock gas lid by undoing the inner plastic fender and accessing the inside of the fender and the fuel filler neck. The inner fender is held in place by plastic rivets and Phillips screws, so you will need to pry out the rivets and remove the screws until the inner fender can be pulled free. Then, unbolt the fuel filler neck where it attaches to the fender and the tank. You only need to manipulate the rubber seal between the inner filler door and the filler neck, so there is no need to completely remove the neck. Finally, tighten the bolts and clamps on the filler neck and the fuel tank, and replace the inner fender.
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Replacing the fuel door
If your Mini Cooper's fuel filler flap won't unlock, first check if you have a manual release option. If not, you can try to break the plastic door lock pin by twisting and pulling on the locking mechanism. You can then replace the locking mechanism or refit and reconnect the old one until you can find a replacement.
If you need to replace the fuel door, you will first need to remove the old filler door assembly. To do this, undo the inner plastic fender and remove the rivets and screws holding it in place until you can pull it free. Next, unbolt the fuel filler neck where it attaches to the fender and the tank. You don't need to remove the wheel, but it may be easier if you do.
With the old assembly removed, you now have space to work on installing the new one. First, pull the filler neck partially out of the tank. Press the filler neck into the housing and work the rubber ring into the corresponding groove—you can use WD-40 to make this easier. Once the filler neck is in the correct place, check that the locking latch is still in its place in the fender. Press the filler housing into the fender until the clips click, then push the lock latch back through and check that it lines up properly. Finally, tighten the bolts and clamps on the filler neck and the fuel tank, then replace the inner fender.
If you are just looking to replace the chrome cap on an S model Mini Cooper, this is a five-minute job. Open the door, press in with a small screwdriver, and release the tab. The chrome part should now be removable.
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Accessing the fuel filler neck
To access the fuel filler neck of a Mini Cooper, you may first need to open the fuel filler flap/door. If your Mini Cooper has a manual release, you can do this by locating the access panel inside the boot on the left. Remove this panel, and you should see a small white lever set into the body. Slide this towards the rear of the car to manually unlock the filler flap.
If your Mini Cooper does not have a manual release, you will need to follow a different process. First, jack up the right rear lift point and unclip the upper portion of the splash guard. Then, gain access to the body panel cavity to unmount and loosen the assembly (fuelling compartment and door) from the body panel. Ensure you leave the fuel hoses attached.
Once the fuel filler flap is open, you can access the fuel filler neck. To do this, you will first need to undo the inner plastic fender to access the inside of the fender and the fuel filler neck. The inner fender is held in place by plastic rivets and Phillips screws, so you will need to pry out the rivets and remove the screws until you can pull the inner fender free.
Next, you will need to unbolt the fuel filler neck where it attaches to the fender and where it is clamped to the tank. You do not need to remove it completely, but you should ensure you have enough access to manipulate the rubber seal between the inner filler door and the filler neck. Finally, tighten the bolts and clamps on the filler neck and the fuel tank, and replace the inner fender.
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Breaking the plastic door lock pin
If you are unable to open the fuel tank of your Mini Cooper, it may be because the locking mechanism is faulty. In this case, you will need to break the plastic door lock pin to open the fuel door. This can be done by twisting and pulling the locking mechanism.
Locate the Locking Mechanism: The first step is to locate the locking mechanism on your Mini Cooper's fuel door. It is usually located on the right rear body panel cavity, not accessible from the trunk area.
Prepare the Tools: You will need a flat-head screwdriver and possibly a hammer. A small, thin, or skinny flat-head screwdriver is ideal for this task.
Insert the Screwdriver: Insert the flat-head screwdriver into the locking mechanism. You may need to apply some force to wedge the screwdriver into the mechanism.
Twist and Turn: Once the screwdriver is in place, twist and turn it while applying pressure. This will create leverage and force on the plastic door lock pin.
Break the Pin: Continue twisting and turning the screwdriver until you feel the plastic door lock pin break. You may need to apply more force or try different angles to find the best leverage point.
Open the Fuel Door: Once the plastic door lock pin is broken, you should be able to pull or twist the locking mechanism to open the fuel door.
It is important to note that breaking the plastic door lock pin is a temporary solution. It is recommended to replace the locking mechanism with a new one or refit and reconnect the broken part until a replacement is available.
Additionally, there are other methods to unlock doors that may be applicable in this scenario. For example, using a credit card, a bobby pin, or a paperclip, although these methods may not be as effective on a car door as they are on residential doors.
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Locating the manual release
The Mini Cooper's fuel filler flap has a manual release option, which can be used if the flap does not unlock. This manual release can be accessed by opening the boot and locating the access panel on the left. Inside, you will find a small white lever set into the body. Slide this lever towards the rear of the car to manually unlock the filler flap.
It is worth noting that not all Mini Coopers have a manual release option. For those that do not, the fuelling compartment is located in the right rear body panel cavity and is not accessible from the trunk area. In this case, you would need to jack up the right rear lift point and unclip the upper portion of the splash guard to gain access to the body panel cavity. Once inside, you would need to unmount and loosen the assembly to access the fuel hoses and filler compartment.
If your Mini Cooper has a locking mechanism with a broken door lock pin, you may need to replace it. The locking mechanism can be found by searching for the supplier part number, which may be different from the BMW/MINI part number.
Additionally, if you are looking to replace the chrome cap on an S model Mini Cooper, you can do so by opening the door and pressing in with a small screwdriver to release the tab. The chrome part can then be pulled off.
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Frequently asked questions
If your Mini Cooper has a manual release, you can open the fuel tank by locating the access panel on the left inside the boot. Remove the access panel and look inside to find a small white lever. Slide this towards the rear of the car to manually unlock the filler flap.
If your Mini Cooper doesn't have a manual release, you can try using a small screwdriver to press in and release the two clips that are hidden behind the filler door assembly.
If your fuel tank is stuck, you can try to break the plastic door lock pin by twisting and pulling the locking mechanism. You can then replace it with a new locking mechanism or refit and reconnect the old one pending replacement.
To replace the fuel door on a Mini Cooper, first open the door and press in with a small screwdriver to release the tab. Remove the stock gas lid and the inner plastic fender by prying out the rivets and taking out the screws. Then, unbolt the fuel filler neck where it attaches to the fender and the tank. Finally, install the new fuel door assembly by pressing the filler neck into the housing and working the rubber ring into the corresponding groove.
The Mini Cooper S has an old-school chrome filler cap, similar to the surface-mounted fillers of the past.
