The 2000 Honda S2000 has 6 recalls, the most serious being multiple seatbelt issues that can leave occupants unrestrained in a crash, either because the retractor jams and the belt cannot be pulled out at all, or because the belt develops excessive slack and fails to hold the occupant firmly.
The seatbelt concerns break down into two related problems. In one, the retractor mechanism can deform and lock up entirely, making the belt impossible to extend and effectively unusable before you even buckle in. In the other, which is specific to the convertible configuration, the seatbelt can develop slack when the top is down and the seat is pushed fully rearward, because the belt does not retract cleanly due to interference between the seat and the convertible top cover. A belt with that much slack offers significantly less protection in a collision, since it cannot pull tight against the occupant quickly enough. Prior repair attempts did not fully resolve the retractor deformation issue, which is why multiple filings address what is essentially the same underlying defect.
On the lighting side, the side marker lamp lenses in the tail lamp assembly were made with the wrong dye, which makes them more vulnerable to fading from UV exposure and heat over time. The red color can wash out, reducing the visibility of the vehicle's rear and side markings to other drivers.