Baldwin B143 vs MAHLE OC 47: Oil Filter Compatibility
Compare Baldwin B143 and MAHLE OC 47 oil filters by compatibility, dimensions, thread size, gasket fit, bypass valve, anti-drainback valve status, and match confidence. Use this comparison as a fitment review, not as an automatic substitution guarantee. Both use a 3/4-16 thread.
Quick verdict
Both use a 3/4-16 thread.
- Thread size is the first hard-fit check for any comparison of spin-on filters.
- Gasket OD and gasket ID are the most important seal-related dimensions.
- Height differences can matter for clearance even when thread and gasket fit appear close.
- Bypass and anti-drainback differences may be important, depending on the application.
Baldwin B143 and MAHLE OC 47 specifications
How matching is scored| Specification | Baldwin B143 | MAHLE OC 47 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 71.98 mm | 72 mm |
| Gasket ID | 62.53 mm | 62 mm |
| Can OD | 76.2 mm | 76 mm |
| Height | 129.4 mm | 119.5 mm |
| Internal bypass valve | No | Yes |
| Bypass PSID | Not applicable | 32 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD is identical at 71.98 mm.
Gasket ID differs by 0.5 mm (Baldwin B143: 62.53 mm, MAHLE OC 47: 62 mm).
Baldwin B143 is 9.9 mm taller (Baldwin B143: 129.4 mm, MAHLE OC 47: 119.5 mm) -- check clearance before substituting.
Can OD differs by 0.2 mm (Baldwin B143: 76.2 mm, MAHLE OC 47: 76 mm).
Bypass valve presence differs: MAHLE OC 47 has one, Baldwin B143 does not.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.