Door handle & window regulator internals - reproduction & small batches
The metal parts of door and window mechanisms outlive the car; the hidden plastic gears, guides and bushes inside them do not. When a regulator guide crumbles or a handle's internal cam wears, the assembly is NLA and the visible parts are all perfect. We reverse-engineer the failed internal component - often from fragments - and reproduce it in wear-suited polymers, saving the assembly instead of hunting a replacement that carries the same tired plastic.
How we make them
Fragments reconstructed in CAD using the mechanism's geometry and travel, produced in tough, low-friction engineering polymers appropriate to sliding and rotating duty. Function checked against the mechanism's movement.
Typical work: window regulator guides and sliders, door handle internal cams and bushes for 70s-90s European cars.
We reproduce door handle & window regulator internals to order - send photos of any part.
Request a quoteFrequently asked questions
The broken gear is in pieces - is that enough to copy?
Usually yes: tooth geometry can be reconstructed from surviving sections and the mating gear, and travel limits come from the mechanism itself.
Which process will you use?
Whichever suits the part: MJF nylon for tough functional plastics, high-detail resin for fine features, CNC for metal or high-load parts, vacuum casting for small series.
One part or a batch - how does pricing work?
The engineering is a one-time cost; per-unit price drops with quantity. We quote both so you can decide.
Your project stays yours.
Every part we reverse-engineer and produce is confidential and exclusive to the client. We do not resell, share or reproduce a client's parts for anyone else unless the client explicitly authorises it. NDAs available on request.
Have a door part to remake?
Request a quoteRelated
Part numbers, vehicle names and model designations are manufacturer references used only to identify components. Replique Labs is an independent manufacturer and is not affiliated with, sponsored by or endorsed by any vehicle manufacturer.