Denso O2 Sensors

Brand: Denso | Part #EXH-8B77D3

Category: Exhaust > O2 Sensors

The Denso O2 Sensors (P/N EXH-8B77D3) is a direct-fit O2 Sensors for the vehicles listed in the fitment section. Engineered to maintain backpressure inside the range the engine controller was tuned for — no driveability changes. Sourced from Denso, a recognized supplier in the aftermarket auto parts channel. Part number EXH-8B77D3 is the manufacturer reference — match it against your old part or VIN-based lookup to confirm you have the right unit. Confirmed fitment on 2012–2022 Mazda including CX-90, CX-5, Mazda3. Use the year/make/model selector above to verify your exact configuration before checkout. Same- or next-business-day handling on in-stock orders. Free US shipping over $75 — no surprise oversized fees on this item. Backed by a 90-day return window — if the part doesn't fit or the wrong unit was shipped, send it back for a full refund.

Price: $106.99 | In stock — ships within 1-2 business days. Free shipping.