Car Model History

Two-door removable-top 4x4 SUV · 2.5L AMC inline-four

1991 Jeep Wrangler — 2.5L AMC inline-four, AX-5-speed manual (2.5L)

The 1991 factory powertrain material identifies this two-door removable-top 4x4 suv 2.5L AMC inline-four and AX-5 5-speed manual (2.5L) 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
2.5L AMC inline-four
Transmission
AX-5 5-speed manual (2.5L)

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 — 2.5L AMC inline-four, AX-5-speed manual (2.5L). Start with the interval, confirm which engine or configuration you have, then use an exact ordering reference when one is verified.

Service topics
4
Factory intervals
4
Fitment-scoped
4
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

    Published service schedule

    Applies to: 1991 · 2.5L AMC inline-four · United States · This recovered schedule is intentionally scoped to the cited four-cylinder record; six-cylinder and California-specific requirements are not claimed.

    Published interval: 7,500 mi · Normal-service mileage interval; the archive instructs annual oil-filter replacement at each oil change when yearly mileage is below the stated interval.

    Source: Operation CHARM — 1991 Jeep Wrangler L4-150 2.5L VIN P MFI normal-service schedule · 7,500-mile normal-service row and its repeating mileage rows · checked

    2.5L AMC inline-four — cataloged oil-filter fitment

    Baldwin lists B34 for the cataloged 2.5L AMC inline-four Wrangler row; this establishes fitment only, not a service interval.

    Applies to: 1991 · 2.5L AMC inline-four · United States · 2.5L AMC inline-four application only.

    Source: Baldwin Filters — 2017 Automotive Applications catalog · Printed catalog page 347, Jeep 1991 Wrangler 2.5L AMC inline-four row — Lube — B34 · checked

    Verified ordering references

  • Spark plugs

    Sourced interval available

    Applies to: 1991 · 2.5L AMC inline-four · United States · This recovered schedule is intentionally scoped to the cited four-cylinder record; six-cylinder and California-specific requirements are not claimed.

    Published interval: 30,000 mi · Normal-service replacement interval in the cited engine schedule.

    Source: Operation CHARM — 1991 Jeep Wrangler L4-150 2.5L VIN P MFI normal-service schedule · 30,000-mile normal-service row and repeating replacement rows · checked

  • Engine air filter

    Exact reference available

    Published service schedule

    Applies to: 1991 · 2.5L AMC inline-four · United States · This recovered schedule is intentionally scoped to the cited four-cylinder record; six-cylinder and California-specific requirements are not claimed.

    Published interval: 30,000 mi · Normal-service replacement interval in the cited engine schedule.

    Source: Operation CHARM — 1991 Jeep Wrangler L4-150 2.5L VIN P MFI normal-service schedule · 30,000-mile normal-service row and repeating replacement rows · checked

    2.5L AMC inline-four — cataloged air-filter fitment

    Baldwin lists PA2163 for the cataloged 2.5L AMC inline-four Wrangler row; this establishes fitment only, not a service interval.

    Applies to: 1991 · 2.5L AMC inline-four · United States · 2.5L AMC inline-four application only.

    Source: Baldwin Filters — 2017 Automotive Applications catalog · Printed catalog page 347, Jeep 1991 Wrangler 2.5L AMC inline-four row — Air — PA2163 · checked

    Verified ordering references

  • Fuel filter

    Exact reference available

    Published service schedule

    Applies to: 1991 · 2.5L AMC inline-four · United States · This recovered schedule is intentionally scoped to the cited four-cylinder record; six-cylinder and California-specific requirements are not claimed.

    Published interval: 30,000 mi · Normal-service replacement interval.

    Source: Operation CHARM — 1991 Jeep Wrangler L4-150 2.5L VIN P MFI normal-service schedule · 30,000-mile normal-service row and repeating replacement rows · checked

    2.5L AMC inline-four — cataloged fuel-filter fitment

    Baldwin lists BF890 for the cataloged 2.5L AMC inline-four Wrangler row; this establishes fitment only, not a service interval.

    Applies to: 1991 · 2.5L AMC inline-four · United States · 2.5L AMC inline-four application only.

    Source: Baldwin Filters — 2017 Automotive Applications catalog · Printed catalog page 347, Jeep 1991 Wrangler 2.5L AMC inline-four row — Fuel — BF890 · checked

    Verified ordering references

Sources

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

Other 1991 configurations

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