Hey, if your '98 to 2000 Nissan Altima is acting up—maybe rough idling, hesitation, or weird acceleration—it might be the throttle position sensor. This aftermarket replacement is a direct fit for those models. The part numbers match: A22-658N00 and 22620-31U16. It's a 6-pin sensor, black housing, with a hole size of about 11.5x4.5mm. Overall dimensions are roughly 2.64 by 2.28 by 1.26 inches. It's brand new, made from a mix of plastic and metal, so it's lightweight but built to last. Installation is pretty straightforward if you're comfortable with basic tools—just swap out the old one. Keep in mind this is an aftermarket part, not OEM, but it meets the specs and should work just fine. Comes as one sensor, no extra hardware needed. A solid, affordable fix to get your Altima running smoothly again without the dealership price tag. Always double-check your vehicle year and model before ordering, though!