peugeot 306 boot lock - MarkBD
I've got a strange problem with a 306XSi (1995). No matter what I do, the boot won't lock (with either the central locking or the key itself).

Anyone else had this problem or know of how to fix it? I really don't want to take it to my Peugeot dealer as I can't afford a second mortgage....

peugeot 306 boot lock - Andrew-T
I can't remember whether the Mk.1 306 has a key-operated tailgate lock (the Mk.2 doesn't). Assuming not, the fault is either failed wiring or a failed lock-motor. Wiring may be a haystack job; it's fairly easy to replace a motor, but fiddly. If you need one, go to the scrapyard.
peugeot 306 boot lock - DL
Does the key insert into the lock itself?

I've had similar problems with N3 (Early) 306's
peugeot 306 boot lock - MarkBD
The key goes in ok but doesn't turn beyond about 45 degrees.
peugeot 306 boot lock - DL
Might be worth flooding the lock assembly with WD40 - otherwise remove the tailgate inner panel and see what is/isn't happening.

It doesn't sound similar to the problem I encountered.