Bosch 3421 Oil Filter Cross Reference
Use this page to compare the Bosch 3421 with potentially compatible oil filters from other brands. Review thread size, gasket dimensions, overall height, and fitment notes before substituting. A cross reference is a research tool, not an automatic guarantee of fitment.
Before substituting: verify filter style, thread size or cartridge dimensions, gasket dimensions, height, clearance, bypass behavior, and application-specific requirements.
Also searched as
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Best equivalent matches
Select up to 4 filters, then click Compare to view their specs next to the searched filter.
8 compatible options
| Specification | Searched filter Bosch 3421 Reference filter | MAHLE OC 47Best Match Score: 92 SAFE | Score: 92 SAFE | Score: 91 SAFE | Score: 91 SAFE |
|---|---|---|---|---|---|
| Thread size | 3/4-16 | 3/4-16 | 3/4-16 | 3/4-16 | 3/4-16 |
| Gasket OD | 70 mm | 72 mm | 71.5 mm | 69.9 mm | 71 mm |
| Gasket ID | 61 mm | 62 mm | 62.5 mm | 60.9 mm | 62 mm |
| Can OD | 75.01 mm | 76 mm | 76.71 mm | 76.2 mm | 76 mm |
| Height | 120.4 mm | 119.5 mm | 122.43 mm | 130.2 mm | 131 mm |
| Internal bypass valve | Yes | Yes | Yes | Yes | Yes |
| Bypass PSID | 25 - 35 | 32 | 30 | 30 | 27 - 35 |
| Anti-drainback valve | Yes | Yes | Yes | Yes | Yes |
| ID top | Unknown | Unknown | Unknown | Unknown | Unknown |
| ID bottom | Unknown | Unknown | Unknown | Unknown | Unknown |
Other suitable matches
90
score
SAFELarge gasket OD variation · Large gasket ID variation
Large bypass PSI mismatch: 14 psi
Related compatible filter pages
Frequently asked questions
What replaces Bosch 3421?
Several oil filter alternatives may be compatible with Bosch 3421, but you should always verify thread dimensions, gasket sealing dimensions, bypass behavior, anti-drainback valve requirements, and installation clearance before substituting.
How do I confirm a cross reference for Bosch 3421?
Compare thread size, thread pitch, gasket outside diameter, gasket inside diameter, can height, bypass pressure range, and anti-drainback valve requirements before using a substitute.
Can I use a different-size oil filter instead of Bosch 3421?
Sometimes, but only if thread compatibility, gasket seating, bypass behavior, and physical clearance are all acceptable for the application.