Pre catalyst / Before catalyst O2 sensor.Select sensor location from the menu.Made by Bosch.
Part# 11 78 7 523 434 = Before catalyst in front exhaust manifold.
Part# 11 78 7 523 435 = Before catalyst in rear exhaust manifold.
All orders $69 and over will qualify for free shipping (Lower 48 states only) Orders under $69 will have a low cost shipping option available at checkout.
All parts are covered by their respective manufacturer's warranties. Warranties are for 2 year or 24,000 miles, Oembimmerparts.com, LLC warrants that at the time of shipment the products sold will be free from defects in material and workmanship. For complete warranty & returns details Click Here
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.