CO2 replacement sensor kit with board (requires factory installation) CO2 replacement sensor kit with board Call us for a quote SKU: 0390 00891 Category: Testo Sensors Parts & Accessories Tag: Testo Sensors Parts & Accessories Related products Self service replacement O2 sensor – 305/325M & XL0 out of 5 $90.00 Add to cart 3.9′ with 13′ stainless braided TC lead, 8 pin connector0 out of 5 Read more Telescopic handle for plug in vane probes0 out of 5 $396.00 Add to cart