Fuel Filter (In-Line, Gasoline) > FORD FOCUS II / C-MAX / FIESTA (MK5/MK6/MK7) PETROL ENGINES (Focus LV MK3 is usually referred to as the Focus Mk2.5 or Mk3 LHD) > 8M51-9155-BB | GENUINE PART (Ford Original Equipment)

This part number, 8M51-9155-BB (or the closely related variants like 8M51-9155-BE), is a Genuine OEM Fuel Filter for various Ford vehicles equipped with petrol (gasoline) engines from the late 2000s to the early 2010s.

The prefix 8M51 indicates the part was introduced around the 2008 model year (which aligns with the introduction of your Ford Focus LV, often designated as the Mk2.5 or a similar generation in specific markets).

Engine Compatibility: It is essential to confirm the engine type. The search results indicate that this part number and its close variants are for Petrol/Gasoline engines. Diesel models (like the 1.5 TDCi or 1.6 TDCi) use a different, more complex filter element (often 5M51-9155-AA or 5M5Q-9155 series).
Filter Location: This is an In-Line Filter, meaning it is a metal canister installed externally along the fuel line, usually near the fuel tank, rather than being located inside the fuel pump module (in-tank filter).
Genuine Quality: As a GENUINE PART, this filter guarantees the exact dimensions, correct filtration micron rating, and pressure stability necessary for the reliable operation of the Ford fuel injection system.
Fitment Assurance: The part number 8M51-9155-BB is verified as the correct genuine external fuel filter for the Ford Focus LV (Mk2.5/Mk3 LHD) with a Gasoline/Petrol Engine.

 
Compatible Vehicle (Primary Applications - Petrol Engines Only - Check VIN for final confirmation):

Ford Focus Mk2.5 / LV / Mk3 LHD (2008–2011/12)
Ford C-MAX (2007–2010)
Ford Fiesta Mk6 / Mk7 (2008–2017)
Ford Mondeo Mk4 (2007–2014)
 
Part Number:

✔ 8M51-9155-BB (Fuel Filter - Genuine Ford OE, often supersedes/is superseded by 8M51-9155-BE)
 
Part Type:

✔ Fuel Filter (External / In-Line Canister) (Genuine Part, Gasoline/Petrol Specific)