Modern door locks are electromechanical assemblies that combine a conventional mechanical latch with a motor-driven actuator and, on many vehicles, central locking logic. The complete door lock mechanism controls not only whether the door opens from outside, but also the child-lock function and, in newer systems, integration with keyless entry modules. Failure typically announces itself gradually — a door that no longer unlocks remotely despite the central locking activating elsewhere, a handle that requires increasingly heavy pressure to release the latch, or a child-lock lever that has snapped off inside the door card. Water ingress from a degraded door seal is a common accelerant: moisture corrodes the actuator contacts and causes the motor to jam in a partially engaged position, leaving the door either permanently locked or unable to latch securely. Because door lock geometry is unique to each chassis, the OE reference is the only reliable way to confirm that mounting holes, rod connection points, and actuator travel all align correctly with the door skin. VEMO and MEAT & DORIA are two established suppliers in this space, covering the large Volkswagen Group platform range including Audi, BMW, and Škoda, where locking modules differ between body variants of the same model generation.
Door lock mechanisms are highly specific to each body variant — a four-door saloon and a five-door estate on the same platform often use different locking assemblies because the door skin depth and rod routing differ. Use the vehicle selector on this page to filter by your exact make, model, year, and door position (front-left, rear-right, etc.). You can also check the part number on the existing lock body — usually accessible after removing the inner door card — and match it against the OE numbers listed to confirm compatibility before ordering.
OEM door locks are produced to the vehicle manufacturer's original drawings, covering precise actuator travel, connector pinout, and rod geometry. Quality aftermarket equivalents from suppliers such as VEMO or MEAT & DORIA replicate the same specifications and include the same connector housings. Lower-cost alternatives sometimes use motors wound to different specifications, which can result in slower or weaker actuation — particularly in cold temperatures — or connectors that require adaptor plugs and are prone to moisture ingress over time.
Unlike braking components, door locks do not need to be replaced in complete sets. Each lock is independent, and replacing only the failed unit is the standard approach. That said, if the car is older and shows signs of corrosion inside several doors, it may be cost-effective to address multiple locks in one workshop visit to avoid repeated door card removal. Waterproofing the door membrane with fresh butyl tape after any lock replacement is strongly recommended to prevent moisture reaccumulating around the new actuator.
The most common symptom is intermittent or complete failure of remote central locking on one door while others respond normally. Other signs include a clicking or buzzing sound from inside the door when locking is activated — indicating the motor is running but not completing its travel — a door that requires unusually firm exterior handle pressure to open, or a warning light for an open door that activates even when the door is closed, caused by the lock position sensor reading incorrectly due to a sticking mechanism.
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