how is this item installed?

This is a sensor to send rotation speed of the front axle to the cruise control. A magnet (supplied with this item) is mounted to the axle rotates. This sensor/ coil is attached with a bolt thru the the center of the coil to the bracket short part of the 'L'. Then the 'L' bracket is attached to a housing bolt near the magnet. The the bracket is bent as needed to fit your vehicle so you may need a vise and good pliers or vise grip to custom fit.

Can it make a 4000ppm vss signal ?

I don't know the answer but you can contact Rostra Accessories at 800 782-3379 as they make after market cruise controls

is the pulse gen. that's currently on my van, at fault..?? Does anyone know what the resistance value of this component is..?? or continuity ??

I don't own that vehicle anymore so can't measure but all it is is a coil of wire. I'd suggest, unless it is visibly beat up or corroded, if it has continuity /under 1K (1000 ohms) it is likely ok. Be sure to check so you include the wire connection themselves. That would most likely place to corrode and open. Best wishes!

How many magnets go on the drive shaft? Is therw a better way to secure them than a zip tie?

One magnet goes on the driveshaft (although my kit came with three). If you use more than one, the controller will think you're going twice as fast. It is very small, so balance is not an issue. The zip tie it comes with is pretty good quality, but I agree; something other than plastic would be nice. If I lose mine, I will find some non-magnetic wire, and secure it with that. (Maybe that's why they send 3!) A blob of epoxy on a spot that's been sanded clean might work well, too (along with the zip tie).

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🚀 Upgrade your ride with precision speed control—because every mile should feel effortless!

PLUG PLAY UPGRADE - Easily add cruise control functionality to your ride—cruise unit sold separately
VERSATILE VEHICLE FIT - Ideal for street rods, custom cars, motorcycles, and more—no VSS wire needed
DRIVE TYPE FLEXIBILITY - Supports both front and rear wheel drive vehicles plus motorcycles
PRECISION SPEED SIGNAL - Generates accurate speed pulses for flawless cruise control performance
UNIVERSAL COMPATIBILITY - Works seamlessly with Audiovox, Rostra, and SMS cruise control systems

The Rostra 250-4165 Magnetic VSS Speed Pulse Generator Kit delivers precise speed signals essential for cruise control systems. Compatible with select Audiovox, Rostra, and SMS models, it’s perfect for custom vehicles and motorcycles lacking a VSS wire. Supporting both front and rear wheel drive setups, this kit enables seamless cruise control integration, sold separately.

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Manufacturer	Rostra Precision Controls
Brand	Rostra
Item Weight	12 ounces
Product Dimensions	2 x 12 x 9 inches
Item model number	250-4165
Manufacturer Part Number	250-4165

Rostra 250-4165 Magnetic VSS Speed Pulse Generator Kit for and Audiovox Cruise Control

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