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How to Repair an Ignition Lock Cylinder If your car key will not turn, it's time change the ignition lock cylinder. The lock cylinder is a tumbler made of mechanical that your key slides into, in contrast to the switch that is an electrical component of the ignition system. Over time, “wafers” can break or become worn out. WD-40 and graphite may temporarily resolve the issue but replacing the tumblers is the only option. Removal of the Steering Column Modern cars don't have steering column locks. They make use of keys to start the car by pressing and rotating the switch on the dash panel. This modern system is simpler and more effective than the old lock cylinder method. Some older cars still use the traditional lock cylinder. If this part fails, you might need to replace it in order to start the vehicle. This is a job that should be left to professionals. Remove the trim panels that cover the lower and upper columns of the steering using the help of a screwdriver. This will allow access to the area around the steering column. You will see an Allen head bolt on the side of the steering wheel that is closest to the driver that holds the unit for the wiper/signal unit in position. Take this bolt off and set it away. Based on the year of your car you might see 3 or 4 small screws with flat heads, which hold the plastic on top of the turn-signal switch in place. Unscrew them and put them aside. To access the lock cylinder you will have to remove the wiper/signal unit. You can make use of a specific tool to do this or ghetto it with an object of metal, such as a cold-chisel. fix car ignition will also be equipped with a shear bolt removal kit. If you can't insert the key into the ignition switch, the lock cylinder may be stuck. You can either call locksmiths or insert the key into the ignition switch, then move it to the ACC to depress the pin on the lock cylinder. A locksmith can employ a shear tool to remove the lock cylinder. They can make use of a torch to cut the pin and then shave the pin to remove it. They can also re-key your ignition cylinder so that it matches the keys you already have. This will save you money on an entirely new ignition. Replace the Ignition Cylinder The ignition Cylinder is the cylindrical mechanical component which houses and locks your car's key. The cylinder is fitted to the key and “reads” the anti-theft code to allow or denial of the starting of your vehicle. As time passes the cylinder will wear out. It could also break or become bent. In this case you'll need to replace the cylinder to get your car started. A worn or broken cylinder could cause issues turning the key, or the ignition switch not moving into the ACC position or RUN, or a warning light to appear on the dashboard. If you have a spare, try using it in the lock. You might be able smooth the cylinder using graphite or WD-40, however this method is only effective for a limited time. If you have a brand new key you can replace the ignition cylinder, and follow the steps above to install it. When installing the new ignition cylinder ensure it is placed within the flange of the steering column tube and is properly aligned with the keyway on the shroud of the steering column. If you're unsure about the proper alignment of the cylinder, refer to your vehicle's repair manual or an automotive expert. Once the cylinder has been installed then turn the ignition key to ACC or RUN. Listen for a click that indicates that the ignition switch is fully set within the cylinder. If your vehicle has an anti-theft system, you will need to perform the anti-theft relearn process for the new ignition cylinder to program it to your key. Some experts suggest hiring a professional to replace your ignition cylinder. This is because it's often necessary to disable the airbag on the steering column in order for access to the cylinder. The replacement process will likely require removing the steering wheel and ignition covers. Because of this, it is a job best left to a skilled mechanic. They will be able remove the cover on your steering wheel and install a brand new ignition locking cylinder into your car. They'll also verify that the ignition lock cylinder is programmed using your key and that it starts properly when you insert it. Installing the Ignition Cylinder Although ignition lock cylinders are no longer as important in modern vehicles because of remote start and push-tostart systems older cars still use them. If your car's ignition switch or key seems to be stuck, or if you're having trouble starting the vehicle, a defective ignition lock cylinder could be the reason. It's simple to fix your car's issue by replacing the cylinder for your ignition lock. The ignition cylinder is the mechanical part of the system that slides into the ignition switch of your car and sends power to the rest of the engine. The ignition switch as well as the ignition cylinder are two separate components. The switch is an electronic component that connects to your car's computer system to send signals to start the engine when you turn the ignition key. The pins on cylinders for ignition locks move upwards and downwards, which allows your key to move and rotate within the cylinder. Each movement of the cylinder and key creates friction that keeps the key in place. However, over time, the wafer tumblers can wear out. When the tumblers are worn down, the key of your car won't be able slide into or rotate the cylinder. A damaged ignition cylinder is typically the first sign of trouble in the majority of vehicles. However, the key can become stuck and become difficult to remove or insert from the ignition cylinder. These are indications that you should replace your ignition lock cylinder as fast as possible. Replacing your ignition cylinder isn't difficult, but it is an undertaking that should be completed by a trained DIYer only if you're able to follow the correct procedure for your specific brand and model of vehicle. You can complete the task quickly and accurately with a complete repair guide for your vehicle. If you are not comfortable installing the ignition cylinder on your own it is possible to have one of our ASE-certified mobile mechanics perform the work for you at a time and place. Test the Ignition Cylinder The ignition lock cylinder, also referred to as the ignition lock cylinder, is a mechanical device that fits your key to permit it to turn and start your car. It's mounted inside the ignition switch, which locks the ignition and reads the anti-theft code to allow the key to turn. The cylinder for the ignition lock is prone to wear and may eventually fail, leading to problems with the power supply to your vehicle or making it difficult to remove and insert the key. The most obvious indications that a car's lock cylinder is about to be damaged is having trouble getting your car started or locating locations where the key is stuck when you attempt to turn it. These problems usually mean that the cylinder is worn out and requires replacement. In some instances you may even see a warning light on your dashboard that signals an imminent failure. As the cylinder ages it may be damaged by corrosion or wear and tear. This could cause the pins and tumblers to wear out and break, preventing the ignition of your car from working. In some cases the ignition may work if you jostle it around, but this is a dangerous indicator that something is wrong. You can examine your ignition cylinder and see whether the cylinder or key is damaged or worn out. You can test with a multimeter whether there's a voltage connection between the red wire connection of the module and the battery terminal of the ignition coil. If you do not find any voltage, then the module and switch are likely to require replacement. Replacing the ignition cylinder typically costs $200 to $300, and it's generally recommended to let a professional mechanic perform the job. The process is complicated by the fact that you may need to remove other components to access the cylinder for ignition, such as the steering column. Depending on your vehicle the procedure for replacing it may also require disabling the airbag system, and you'll have change the programming of your key to work with the new cylinder. It's usually done by an authorized dealer. However, you can do it yourself if you have the right tools and instructions.