Product Description
Full-size Broncos went through several tank revisions in just a few years, and this one is specific to 1979: 33-gallon capacity, vent pipe toward the front, with an emission/rollover valve hole on top. Getting the vent pipe direction and EMS hole right matters here — MTS builds four different variants of this same basic tank across 1978-1986 (SKUs 4251A-D, plus 4251E/L/S for later years).
A pinhole rust leak in an old steel tank rarely stays a pinhole for long, and by the time it's obvious, the surrounding metal is usually too thin to weld safely. This polyethylene replacement sidesteps rust entirely, so the installation notes below are what actually determines whether this swap goes smoothly.
Technical Specifications
- Capacity: 33 Gallons
- Material: High-Density Cross-Linked Polyethylene
- Dimensions: 21" x 31" x 15"
- Installation Type: Lock Ring, front vent pipe, with EMS valve hole
- Includes new lock ring and gasket
- Replaces OEM part number D9TZ-9002-B
Fitment
- Ford Bronco (Full-Size, 33-Gal, Front Vent, With EMS) | 1979
⚠ Compatibility Note: Front vent pipe, with emission/rollover valve hole, specific to 1979. Confirm your vent pipe direction and EMS hole before ordering — three other 1978-1979 variants exist (SKUs 4251B/C/D).
✓ Appearance Note: Because each tank is custom molded, you may occasionally notice minor cosmetic surface bubbles left over from the molding process. This is purely cosmetic, has no effect on performance or durability, and doesn't occur on every unit — every tank is individually pressure-tested before it ships to confirm a leak-free seal.
⚠ Order Notice: MTS builds each fuel tank to order rather than pulling from mass-produced stock. Please allow a 7–10 business day lead time for manufacturing and individual pressure testing before your tank ships.
Product Videos
Custom Field
Make FORD
Model FULL SIZE BRONCO 33-GAL
mpn 4251A
Fitment Ford Bronco (Full-Size, 33-Gal, Front Vent, With EMS) | 1979
