85 2+2 seat belt

It's probably twisted inside the panel or has goop on it. Take the panel off and see if it's twisted or use an approved cleaner on the belt. I've never seen the spring being the problem.

Thanks Steve, as I have said, the belts on this car has always (since 1990) had very weak retractors. I wonder why the 86 seatbelts are covered by an extended warranty, but not the 85. I talked to Nissan and they are looking at the problem. I was told Nissan has been moving the warranty issues on seatbelts around quite a bit. From lifetime to 10 years, etc.

The new 1986 seatbelt (date of manufacture 2005) works wonderfully in my 85 ZX, even though the parts guys say it would not fit. A small amount of fileing was required to the small upper screw mounting hole on the retraction mechanism. What a difference, my dealer sold me the belt with a steep discount at under $72. If It was an 86, the belts would still be under warranty. What a difference. The old belt would only spool in 3 inches of belt, no goo, no twists, just defective I guess. It was a very easy job to replace the front belt.