Clamp upper — a genuine BMW part, number 18 31 1 404 478. The number stamped on the part is 18311404478; BMW's catalog files it under the short number 1404478. You will find it on our Exhaust shelf, under Other Exhaust system parts.
It fits the E36 sedan, coupe and convertible (M3, 1995), with the S50 engine.
BMW draws it on the Catalyst/Lambda Probe (18_1129) diagram. It weighs about 179 g (0.4 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.
Every used part is inspected and graded before listing. Condition grades:
Good — minimal wear, fully functional.
Fair — normal wear, fully functional.
Acceptable — visible wear, still functional.
Returns: 30 days if a part arrives damaged or isn't what the listing described. Full policy.
Shipping: Ships within the US. Orders ship within 1–2 business days; small parcels ship free on orders of $75.00 or more. Oversize items ship at a flat $49.99 each — free shipping does not cover them.
