How do you adjust the gear linkage on a 2003 vauxhall corsa

All the queries regarding to the gear linkage adjustment of Corsa D can be found here

https://youtu.be/Dji08G2etME

https://youtu.be/UbY5xb_6JTI

Corsa gear linkage upgrade
https://youtu.be/H_PHxaXMY2A

If its 2 gears sounds like a clutch problem especially if it crunches going into reverse.

The linkage may be out of adjustment preventing the shifter from moving into reverse or park.
One way to test this is to disconnect the linkage and manually move the lever on the transmision making sure that it can be set into park. Also try moving the lever counting each click from park to low gear to make sure it is clicking into each gear. If this works then the linkage is probably out of adjustment.
On the link cable there is typically a bolt in an oval shaped metal near the transmission shift lever.
1)Detach the shift cable from the transmission shift lever
2)Put the transmision shift lever in the park position, and also the shifter in the cab
3)Loosen the adjustment bolt
4)Reattach the cable to the lever
5)Tighten the adjustment bolt in place
6)Confirm that you can shift through all of the gears
Hope this helps

Check the gear lever linkage adjustment, and the gear lever stick foundation.

check the linkage adjustment try and pull the lever back and hold it between gears or the trans could be shot

yes linkage is a common problem and a quick fix good luck

I'd venture to say your linkage is out of adjustment - don't mess with the bands if the transmission worked before. Move the shift lever all the way to the lowest gear detent (farthest away from Park), then tighten the linkage cable adjustment until the shifter on the transmission is right at its stop on the transmission. The shift indicator needle should be centered on the letter. (If the transmission is now working properly and the needle is still off, you can adjust the needle inside the shifter housing by sliding its clip on the bracket attached to the shift lever. I didn't say it would be easy to get at it...)

worn gearbox or engine mounts allowing the gearbox to move and unlatch the shift linkage from its position, or the shift linkage is mal-adjusted and not properly engaged in 5th gear at all.

There may be a knuckle joint that can be adjusted to give correct shifter operation, it may be out of adjustment. GM cars are prone to this after reversing uphill in a manual car, your Nissan may be similar. The engine moves away from the area of the shift lever and pulls the knuckle joint out further than it is supposed to be and causes the gears not to enage securely any more.

It`s the reverse light switch under the bonnet had to replace it on my 16v t reg corsa costs about 8-£10 and comes off easily because it`s just a bolt with electricals leading to the back lighting. This happens on every Corsa. Let me guess Your Heater control lights and fan swich lights have gone too on the interior. Any problem corsa related, been there done it.