1988 BMW 325 Four-Door

Service topics

10

Factory intervals

9

Fitment-scoped

10

Exact references

1

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.

• 01

  Engine oil and filter

  Sourced interval available

  Applies to: 1988 · M20 2.7L inline-six · 325 (E30) · United States · Exact 1988 325 record; other E30 engines, body styles, iX, and M3 configurations are not claimed.

  Published interval: 7,500 mi / 12,000 km / 6 months · Maximum guideline; service sooner when the on-board indicator calls for it.

  Source: BMW — 1988 325 (E30/M20) service-indicator schedule, preserved by Operation CHARM · Service Intervals/Equivalent Mileage — Oil Service maximum; Indicated Engine Oil Service · checked 2026-08-05

• 02

  Inspection I

  Sourced interval available

  Applies to: 1988 · M20 2.7L inline-six · 325 (E30) · United States · Exact 1988 325 record; other E30 engines, body styles, iX, and M3 configurations are not claimed.

  Published interval: 15,000 mi / 24,000 km / 12 months · Maximum guideline; alternate with Oil Service and Inspection II as indicated.

  Source: BMW — 1988 325 (E30/M20) service-indicator schedule, preserved by Operation CHARM · Service Intervals/Equivalent Mileage — Inspection I maximum · checked 2026-08-05

  Inspection II

  Applies to: 1988 · M20 2.7L inline-six · 325 (E30) · United States · Exact 1988 325 record; other E30 engines, body styles, iX, and M3 configurations are not claimed.

  Published interval: 30,000 mi / 48,000 km / 24 months · Maximum guideline; includes Inspection I plus the additional published tasks.

  Source: BMW — 1988 325 (E30/M20) service-indicator schedule, preserved by Operation CHARM · Service Intervals/Equivalent Mileage — Inspection II maximum · checked 2026-08-05

• 03

  Brake fluid

  Sourced interval available

  Applies to: 1988 · M20 2.7L inline-six · 325 (E30) · United States · Exact 1988 325 record; other E30 engines, body styles, iX, and M3 configurations are not claimed.

  Published interval: 12 months · BMW's archived Inspection I note recommends annual replacement.

  Source: BMW — 1988 325 (E30/M20) service-indicator schedule, preserved by Operation CHARM · Indicated Inspection Service I — brake-fluid replacement note · checked 2026-08-05

• 04

  Automatic-transmission fluid, strainer, and gasket

  Sourced interval available

  Applies to: 1988 · M20 2.7L inline-six · automatic · 325 (E30) · United States · Exact 1988 325 record; other E30 engines, body styles, iX, and M3 configurations are not claimed.

  Published interval: 15,000 mi / 24,000 km / 12 months · At Inspection I; maximum guideline and indicator may call sooner.

  Source: BMW — 1988 325 (E30/M20) service-indicator schedule, preserved by Operation CHARM · Indicated Inspection Service I — automatic-transmission fluid/strainer/gasket · checked 2026-08-05

  Manual-transmission fluid

  Applies to: 1988 · M20 2.7L inline-six · manual · 325 (E30) · United States · Exact 1988 325 record; other E30 engines, body styles, iX, and M3 configurations are not claimed.

  Published interval: 30,000 mi / 48,000 km / 24 months · At Inspection II; maximum guideline and indicator may call sooner.

  Source: BMW — 1988 325 (E30/M20) service-indicator schedule, preserved by Operation CHARM · Indicated Inspection Service II — manual-transmission fluid · checked 2026-08-05

• 05

  Main fuel filter

  Sourced interval available

  Applies to: 1988 · M20 2.7L inline-six · 325 (E30) · United States · Exact 1988 325 record; other E30 engines, body styles, iX, and M3 configurations are not claimed.

  Published interval: 30,000 mi / 48,000 km / 24 months · At Inspection II; maximum guideline and indicator may call sooner.

  Source: BMW — 1988 325 (E30/M20) service-indicator schedule, preserved by Operation CHARM · Indicated Inspection Service II — main fuel-filter replacement · checked 2026-08-05

• 06

  Engine air filter

  Sourced interval available

  Applies to: 1988 · M20 2.7L inline-six · 325 (E30) · United States · Exact 1988 325 record; other E30 engines, body styles, iX, and M3 configurations are not claimed.

  Published interval: 30,000 mi / 48,000 km / 24 months · At Inspection II; maximum guideline and indicator may call sooner.

  Source: BMW — 1988 325 (E30/M20) service-indicator schedule, preserved by Operation CHARM · Indicated Inspection Service II — air-filter replacement · checked 2026-08-05

• 07

  Spark plugs

  Sourced interval available

  Applies to: 1988 · M20 2.7L inline-six · 325 (E30) · United States · Exact 1988 325 record; other E30 engines, body styles, iX, and M3 configurations are not claimed.

  Published interval: 30,000 mi / 48,000 km / 24 months · At Inspection II; maximum guideline and indicator may call sooner.

  Source: BMW — 1988 325 (E30/M20) service-indicator schedule, preserved by Operation CHARM · Indicated Inspection Service II — spark-plug replacement · checked 2026-08-05

• 08

  Engine coolant

  Sourced interval available

  Applies to: 1988 · M20 2.7L inline-six · 325 (E30) · United States · Exact 1988 325 record; other E30 engines, body styles, iX, and M3 configurations are not claimed.

  Published interval: 24 months · BMW replacement recommendation in the Inspection II schedule.

  Source: BMW — 1988 325 (E30/M20) service-indicator schedule, preserved by Operation CHARM · Indicated Inspection Service II — coolant replacement note · checked 2026-08-05

• 09

  Camshaft drive belt

  Sourced interval available

  Applies to: 1988 · M20 2.7L inline-six · 325 (E30) · United States · Exact 1988 325 record; other E30 engines, body styles, iX, and M3 configurations are not claimed.

  Published interval: 50,000 mi / 48 months · Replace at every second Inspection II or the first inspection due after 50,000 miles, whichever comes first.

  Source: BMW — 1988 325 (E30/M20) service-indicator schedule, preserved by Operation CHARM · Indicated Inspection Service II — 2.7L camshaft-drive-belt note · checked 2026-08-05

• 10

  Engine oil filter — catalog fitment

  Exact reference available

  Applies to: 1988 · United States

  2.7-liter Super Eta inline-six (127 hp) — K&N HP-2009

  K&N HP-2009

  Manufacturer-catalog replacement-part fitment only; it does not establish a BMW service interval. Confirm the VIN, production date, engine, and installed filter dimensions before ordering.

  Applies to: 1988 · 2.7-liter Super Eta inline-six (127 hp) · 325 · United States · Exact model-year and engine-family catalog scope; verify VIN and production date before ordering.

  Source: K&N — BMW 325/325e/325i replacement oil-filter catalog · 1988 BMW 325-family 2.5L/2.7L gasoline — HP-2009 · checked 2026-09-01

  Verified ordering references

  • Validated equivalentK&N HP-2009

    Qty. 1 · Spin-on replacement oil filter · catalog-listed

    Verify the current manufacturer application listing, VIN, production date, and installed dimensions before purchase.

    Catalog: K&N — BMW 325/325e/325i replacement oil-filter catalog · 1988 BMW 325-family 2.5L/2.7L gasoline — HP-2009 · checked 2026-09-01

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