Shop our range of Mila replacement gearboxes for uPVC, composite and timber door multipoint locking systems. A replacement gearbox is often the ideal solution when the central lock case has failed but the existing locking strip, hooks, rollers or bolts are still in good condition.
Our Mila gearbox range includes replacement lock cases suitable for repairing worn, damaged or jammed door locks. Common signs of gearbox failure include a loose or stiff door handle, difficulty turning the key, the locking points failing to engage or the door no longer locking correctly.
Before ordering, compare your existing gearbox carefully. Important measurements include the backset, centres, faceplate design, spindle position and the location of the fixing screws. You should also check any identifying numbers or markings stamped onto the original lock case.
Replacing only the gearbox can be a practical and cost-effective alternative to replacing the complete multipoint locking mechanism. Browse the available Mila gearbox options and select the model that matches your existing door lock.
Collection is also available from our store in Denton, Manchester, making it easier for local customers to collect their replacement gearbox without waiting for delivery.
Need help identifying the correct replacement? Send us clear photographs of the original gearbox and locking strip, along with the main measurements, and our team at Nigel Waters Hardware will help you check compatibility.

