The boxy Haval Cool Dog — exported in several markets as the GWM Haval H3 — has a tall, near vertical rear door that is heavy at the top of its arc. This electric trunk kit gives that door powered operation: the original gas struts make way for motor driven units, a controller handles travel and safety, and the door can be raised from the key remote, the rear handle switch or a button fitted in the cabin. The retrofit keeps the factory hinge points, latch and locking system, so the body is never modified and the car stays road legal in markets that inspect structural changes.

Because the Cool Dog hatch is squared off rather than curved, air pressure resists the final part of the closing stroke. Our controller compensates with a two stage soft close profile, letting the door settle onto the seal instead of slamming it.

Key remote

A long press on the original fob lifts or lowers the door from a distance, no extra transmitter required.

Rear handle switch

The factory handle is converted into an electric trigger so the car behaves the way passengers already expect.

Cabin button

An illuminated dash switch allows operation from the driver seat, useful in rain, at tolls or on a busy kerb.

Programmable height

Store a lower limit for underground car parks, then clear it whenever full travel is needed again.

• Hall sensor load detection reverses the door immediately when something blocks the closing edge.
• Powered travel is inhibited unless the transmission is in park, so the door cannot move in traffic.
• Motor current is capped to protect the gear set when the door is obstructed.
• An inline fuse isolates the retrofit circuit, keeping the factory loom intact.
• Manual release remains functional if the battery is flat or disconnected.

Prop the rear door, release the original struts from their ball studs, mount the supplied brackets and fit the motorised units. Route the harness next to the factory loom to the module, then install the cabin button in a blank panel. Store the stop height, run two complete cycles and confirm that the pinch guard reverses. A wiring diagram and photo sheet travel in the carton, and our technical team can join a video call for a first time installation.

Struts are cradled in moulded foam inside a printed carton, and fastener bags are labelled by mounting position. Every set is bench tested before dispatch — motor current, harness continuity and pinch guard response. Distributors can order neutral packing, private label printing, custom part numbers or translated manuals, and we hold struts, modules and switches in stock so service parts ship without waiting for a production run.

Send the model year or VIN and we will confirm Cool Dog or H3 specification, the wholesale price band and the next shipment date within one working day.