2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85)

E85 / Roadster / Coupe / Global (mainly Europe, USA, Japan)

M54B30N52B30 (from 2004 in some markets)Fiche exacte année/versionGold

Engine identity

Engine code

M54B30, N52B30 (from 2004 in some markets)

Engine summary

Inline-6, naturally aspirated, DOHC, 24-valve

Displacement

2996 cc

Power

170-225 kW (varied by market and exact model, 325i/330i variants)

Torque

300 Nm approx. (varied with engine version)

Fuel system

Electronic fuel injection

Timing drive

Chain-driven dual VANOS (variable valve timing)

Port OBD

Verify by VIN and market

Oils and fluids

Type d’huile

BMW Longlife-01 approved synthetic engine oil

Capacité d’huile

Approx. 6.5 liters including oil filter; includes service-fill and filter change

Liquide de refroidissement

Approx. 7 liters

Fluide

BMW ATF or manual gearbox fluid per specification

Differential fluid

Synthetic hypoid gear oil per BMW specs

Liquide de frein

DOT 4

Service and parts data

Manual transmission

6-speed Getrag manual

Automatic transmission

5-speed GM/GM5 automatic (some early models)

Spark plugs

NGK or Bosch OEM iridium spark plugs, replaced every 30,000 - 60,000 km

Service interval

15,000 km or 12 months, whichever comes first

Dimensions des pneus

Front: 225/45ZR17, Rear: 255/40ZR17 (varies with wheel options)

Couple de roue

Verify by VIN and market

Common and chronic problems

Cooling system plastic parts prone to failure
Electronic VANOS solenoid issues
Soft top leaks (roadster)

First checks

Inspect cooling system hoses and expansion tank
Check VANOS operation codes
Verify soft top seals for roadster versions

Avant de remplacer des pièces

Save fault codes and freeze-frame data before clearing anything.
Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.

Important notes

The initial 2003 Z4 was mainly powered by the M54B30 engine; the N52 engine arrived in from 2004 in some markets.
Exact power and torque figures vary per market emissions regulations and transmission choice.

Codes courants

Source and verification notes

BMW E85 Z4 technical data compilations from official BMW workshop manuals 2003-2005
Verified market sales data cross-referenced from BMW press releases and automotive archives

Outils compatibles

Verify by VIN and market

Questions fréquentes

What engine code does the 2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85) use? 2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85) is listed here with engine code M54B30, N52B30 (from 2004 in some markets); engine summary: Inline-6, naturally aspirated, DOHC, 24-valve.
What oil and capacity does the 2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85) use? 2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85) is listed with BMW Longlife-01 approved synthetic engine oil and oil capacity Approx. 6.5 liters including oil filter; includes service-fill and filter change. Confirm market and engine option before service.
What are common 2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85) problems? Highlighted checks for 2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85): Cooling system plastic parts prone to failure, Electronic VANOS solenoid issues, Soft top leaks (roadster).

Engine identity

Engine code

M54B30, N52B30 (from 2004 in some markets)

Engine summary

Inline-6, naturally aspirated, DOHC, 24-valve

Displacement

2996 cc

Power

170-225 kW (varied by market and exact model, 325i/330i variants)

Torque

300 Nm approx. (varied with engine version)

Fuel system

Electronic fuel injection

Timing drive

Chain-driven dual VANOS (variable valve timing)

Port OBD

Verify by VIN and market

Oils and fluids

Type d’huile

BMW Longlife-01 approved synthetic engine oil

Capacité d’huile

Approx. 6.5 liters including oil filter; includes service-fill and filter change

Liquide de refroidissement

Approx. 7 liters

Fluide

BMW ATF or manual gearbox fluid per specification

Differential fluid

Synthetic hypoid gear oil per BMW specs

Liquide de frein

DOT 4

Service and parts data

Manual transmission

6-speed Getrag manual

Automatic transmission

5-speed GM/GM5 automatic (some early models)

Spark plugs

NGK or Bosch OEM iridium spark plugs, replaced every 30,000 - 60,000 km

Service interval

15,000 km or 12 months, whichever comes first

Dimensions des pneus

Front: 225/45ZR17, Rear: 255/40ZR17 (varies with wheel options)

Couple de roue

Verify by VIN and market

Questions fréquentes

What engine code does the 2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85) use? 2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85) is listed here with engine code M54B30, N52B30 (from 2004 in some markets); engine summary: Inline-6, naturally aspirated, DOHC, 24-valve.

What oil and capacity does the 2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85) use? 2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85) is listed with BMW Longlife-01 approved synthetic engine oil and oil capacity Approx. 6.5 liters including oil filter; includes service-fill and filter change. Confirm market and engine option before service.

What are common 2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85) problems? Highlighted checks for 2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85): Cooling system plastic parts prone to failure, Electronic VANOS solenoid issues, Soft top leaks (roadster).

2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

First checks

Avant de remplacer des pièces

Important notes

Scanning Engine...

2003 BMW Z4 M54B30/N52B30 (from 2004 in some markets) (E85)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

First checks

Avant de remplacer des pièces

Important notes