What to Do When the Trunk of an Old Passat Won't Open?
4 Answers
If you have been using the remote control to open the trunk lid, it might be due to dirt or rust in the lock cylinder. Spraying rust remover into the lock cylinder a few times should help open it. If you haven't used the remote key to unlock it, it can be difficult to open. Before attempting to open it, it's best to press the unlock button on the key or check if the key battery is dead.
I've encountered the issue of the old Passat's trunk not opening many times. The simplest solution is to try using the mechanical key—the keyhole is usually hidden under the rear emblem or next to the license plate light. When turning the key, don't be too gentle, as the lock cylinder in older cars tends to get stuck. If the electric remote fails, it's likely that the key battery is dead; just replace the battery and press the unlock button to re-sync. Humid weather can also cause the trunk's rubber seal and lock mechanism to stick together—a few firm punches near the lock area often pop it open. If it still won't budge, avoid forcing it, as plastic parts in older cars are brittle. Instead, fold down the rear seats and climb into the trunk; there's an emergency release cord on the right-side interior panel—pull it hard to unlock. Oh, and remember to spray some WD-40 on the lock mechanism periodically to prevent rust.
As a classic car enthusiast, trunk issues with the Passat B5 generation are all too common. First, check if the remote control indicator light is on—if not, it's likely out of battery. If the mechanical key won't turn either, the lock cylinder is probably rusted shut. In that case, you'll need to crawl through the rear seats to access the trunk, lift the right-side lining, and locate the release cable. But the most troublesome issue is a broken linkage mechanism—this requires removing interior trim panels to diagnose. Here's a lesser-known tip: when unlocking with the key, if the trunk's hydraulic struts lack tension, the lid can suddenly slam down, so always prop it securely before working. The plastic clips on older cars are especially fragile, so keep spare clips on hand before disassembling trim panels.
I've repaired dozens of old Passats with this issue. Priority check: Inspect the electrical circuit first - open the front door and check if the trunk open icon flashes on the instrument panel. If it does, it indicates a blown fuse. Locate the 15A marked fuse in the driver's footwell fuse box. For mechanical failures, the most common issue is a detached linkage joint, which requires removing the trunk lining for repair. DIYers will need a T20 screwdriver and pry tools. Emergency workaround: Use a screwdriver to press the small square hole near the keyhole (on some models it's between the license plate lights) - hitting the exact lock mechanism position can release it. In winter, pay special attention to frozen locks; pouring warm water usually solves it.
