All the right side speakers on my 05 Estate have stopped working.
Ones on the left continue to work just fine.
Any suggestions?
The first thing I would look at is the wiring between the door and body.
X400 loudspeakers have a habit of failing and coil becomes OPEN CIRCUIT.
Sometimes the coil wires can be soldered back on the connector tab where the harness plugs in.
Sometimes you just need new ones?