WIX 51843 vs Baldwin BT126: Oil Filter Compatibility
Compare WIX 51843 and Baldwin BT126 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 7/8-14 thread.
Quick verdict
Closest known dimensional difference: height +3.5 mm. Verify application-specific requirements before substituting.
- 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.
WIX 51843 and Baldwin BT126 specifications
How matching is scored| Specification | WIX 51843 | Baldwin BT126 |
|---|---|---|
| Thread size | 7/8-14 | 7/8-14 |
| Gasket OD | 69.32 mm | 71.4 mm |
| Gasket ID | 61.34 mm | 62.7 mm |
| Can OD | 93.04 mm | 93.7 mm |
| Height | 177.5 mm | 181 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 8 - 11 | 8 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 7/8-14.
Gasket OD differs by 2.1 mm (WIX 51843: 69.32 mm, Baldwin BT126: 71.4 mm).
Gasket ID differs by 1.4 mm (WIX 51843: 61.34 mm, Baldwin BT126: 62.7 mm).
Baldwin BT126 is 3.5 mm taller (WIX 51843: 177.5 mm, Baldwin BT126: 181 mm) -- check clearance before substituting.
Can OD differs by 0.7 mm (WIX 51843: 93.04 mm, Baldwin BT126: 93.7 mm).
Both open their bypass valve in a comparable range: WIX 51843 at 8-11 psi, Baldwin BT126 at 8-8 psi.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.