Car Model History

Two-door removable-top 4x4 SUV · 4.0L High Output inline-six

1991 Jeep Wrangler — 4.0L High Output inline-six, AX-15 5-speed manual (4.0L)

The 1991 factory powertrain material identifies this two-door removable-top 4x4 suv 4.0L High Output inline-six and AX-15 5-speed manual (4.0L) pairing.

1991 Jeep Wrangler YJ in silver, front three-quarter view
Exact 1991 Wrangler reference photograph; exact configuration not verified ·

Photo: “1991 Jeep YJ in Silver Star, Front Left, 06-12-2022.jpg” by Elise240SX / Wikimedia Commons, licensed under CC BY-SA 4.0. Cropped to 16:9.

Factory configuration

What this model is

Trim
Wrangler
Body style
Two-door removable-top 4x4 SUV
Engine
4.0L High Output inline-six
Transmission
AX-15 5-speed manual (4.0L)

United States factory powertrain/body pairing. Appearance and equipment packages that do not change this identity are not duplicated here.

Configuration-specific ownership

Maintenance for this exact configuration

These items are filtered to the engine, transmission, trim, and model-year applicability recorded for this configuration. Broad Amazon category searches are suppressed here; shopping links appear only beside catalog-backed part numbers.

Service desk

What this car needs & when

Use this as a service-planning checklist for 1991 Jeep Wrangler — 4.0L High Output inline-six, AX-15 5-speed manual (4.0L). Start with the interval, confirm which engine or configuration you have, then use an exact ordering reference when one is verified.

Service topics
3
Factory intervals
0
Fitment-scoped
3
Exact references
3

Before orderingIdentify your engine, options and build date.Part numbers and sizes can change within one model year. Shopping links appear only for catalog-backed references; still verify the listing against your vehicle before ordering.

  • Engine oil and filter

    Exact reference available

    4.0L High Output inline-six — cataloged oil-filter fitment

    Baldwin lists B34 for the cataloged 4.0L High Output inline-six Wrangler row; this establishes fitment only, not a service interval.

    Applies to: 1991 · 4.0L High Output inline-six · United States · 4.0L High Output inline-six application only.

    Source: Baldwin Filters — 2017 Automotive Applications catalog · Printed catalog page 347, Jeep 1991 Wrangler 4.0L High Output inline-six row — Lube — B34 · checked

    Verified ordering references

    • Validated equivalentBaldwin B34

      Qty. 1 · Spin-on engine lubricating-oil filter · catalog-listed

      Cataloged for the 1991 Wrangler 4.0L High Output inline-six; confirm VIN and installed engine before ordering.

      Catalog: Baldwin Filters — 2017 Automotive Applications catalog · Printed catalog page 347, Jeep 1991 Wrangler 4.0L High Output inline-six row — Lube — B34 · checked

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  • Engine air filter

    Exact reference available

    4.0L High Output inline-six — cataloged air-filter fitment

    Baldwin lists PA2101A for the cataloged 4.0L High Output inline-six Wrangler row; this establishes fitment only, not a service interval.

    Applies to: 1991 · 4.0L High Output inline-six · United States · 4.0L High Output inline-six application only.

    Source: Baldwin Filters — 2017 Automotive Applications catalog · Printed catalog page 347, Jeep 1991 Wrangler 4.0L High Output inline-six row — Air — PA2101A · checked

    Verified ordering references

    • Validated equivalentBaldwin PA2101A

      Qty. 1 · Engine air-filter element · catalog-listed

      Cataloged for the 1991 Wrangler 4.0L High Output inline-six; confirm VIN and installed engine before ordering.

      Catalog: Baldwin Filters — 2017 Automotive Applications catalog · Printed catalog page 347, Jeep 1991 Wrangler 4.0L High Output inline-six row — Air — PA2101A · checked

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  • Fuel filter

    Exact reference available

    4.0L High Output inline-six — cataloged fuel-filter fitment

    Baldwin lists BF890 for the cataloged 4.0L High Output inline-six Wrangler row; this establishes fitment only, not a service interval.

    Applies to: 1991 · 4.0L High Output inline-six · United States · 4.0L High Output inline-six application only.

    Source: Baldwin Filters — 2017 Automotive Applications catalog · Printed catalog page 347, Jeep 1991 Wrangler 4.0L High Output inline-six row — Fuel — BF890 · checked

    Verified ordering references

Sources

  1. Mopar Owner's Information — select 1991 Jeep Wrangler

Other 1991 configurations

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