The Bosch 71039 fuel filter (also cataloged under Bosch manufacturing number 0450905601) is a heavily utilized inline filter for vintage European vehicles from the 1980s through the late 1990s. Its primary and most extensive application is for classic Volvo models, but it also crosses over to select vintage Audi, Volkswagen, Saab, and high-end European platforms. (gar2-Y2)
Primary Vehicle Fitment
- Volvo: Fits a massive range of rear-wheel-drive classics including the 240, 242, 244, 245, 260, 740, 760, 780, 940, 960, and V90.
- Saab: Fits older 900, 9000, as well as early 9-3 and 9-5 variants.
- Volkswagen: Vintage applications such as the Scirocco (specifically 1986–1989 models).
- Audi: Found on specific older trims like the A6 Quattro (select 1997–1998, 2000 models).
- Exotics: Historically cross-referenced for select vintage Ferrari and Rolls-Royce fueling systems.
Physical Specifications for Verification - If you are physically checking the filter against what is on your vehicle, the Bosch 71039 uses distinct threaded fittings rather than quick-disconnect lines:
- Outer Diameter: 80 mm
- Total Height: 155 mm
- Inlet Thread Size: M14 x 1.5
- Outlet Thread Size: M12 x 1.5
Ferrari - The Bosch 71039 fuel filter (Bosch part number 0450905601) crosses directly over to Ferrari factory part number 117792. It was utilized during the K-Jetronic / Motronic fuel-injection eras of the mid-1980s through the 1990s. It is a direct catalog fit for the following classic Ferrari models:
Important Technical Note - Ferrari later updated its factory catalog recommendations to a smaller Bosch filter variant (0450905203). If your vehicle has been converted to the newer, smaller filter supersession, using the original, larger Bosch 71039 will require you to revert to the larger vintage mounting bracket and original M14/M12 fuel line banjo fittings. Many collectors prefer sticking to the 71039 because it offers a larger internal volume capacity (0.6L vs 0.4L).
