2009 BMW Z4 problems
The 2009 BMW Z4 was sold with 2 engines that we have documented: the BMW N54/N55 and the BMW N52 / N53. The BMW N54/N55 has serious faults that affect the cars of that year. The safest option is the BMW N52 / N53 (verdict “With caution”). Outside the engine, 3 documented faults affect 2009 cars, such as retractable hardtop sensor, actuator and motor failure.
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2009 BMW Z4 score: acceptable reliability
Calculated using only 12 documented faults and their sources: the most serious and frequent faults weigh more. How it is calculated
- Engine5.8From 5.2 to 6.5 depending on the engine
- Gearbox10.0No documented faults
- Suspension9.4Technical inspection (ITV) only: 0.2 times the defects normal for its age
- Brakes9.5Technical inspection (ITV) only: 0.2 times the defects normal for its age
- Tyres and wheels10.0No documented faults
- Steering9.5Technical inspection (ITV) only: 0.2 times the defects normal for its age
- Electrical system9.61 fault
- Headlights and lights9.2Technical inspection (ITV) only: 0.3 times the defects normal for its age
- Electronics and infotainment9.61 fault
- Climate control10.0No documented faults
- Bodywork and interior8.61 fault and ITV (technical inspection)
- Airbags and safety10.0No documented faults
BMW N54/N55 engine in the 2009 BMW Z4
Names: sDrive35i · sDrive35is
- With caution
N54B30 302 hp (2006-2010)
302 hp · N54B30
It is the engine with the most documented faults in the family: high-pressure pump, injectors and wastegates; check which parts have already been replaced.[1][4][5]
- With caution
N54 322 hp (2008-2013)
322 hp · N54B30
It is the engine with the most documented faults in the family: high-pressure pump, injectors and wastegates; check which parts have already been replaced.[1][4][5]
- With caution
N55B30M0 302 hp (2009-2018)
302 hp · N55B30M0
Simpler than the N54 (one turbo and solenoid injectors), but it keeps the oil leaks from the filter housing and the electric water pump; check both.[3][6][7]
Faults that affect 2009 cars
- High severityFrequency: CommonFuelHigh-pressure fuel pump (HPFP) failureThe N54's high-pressure pump is one of its best-documented failures: most units will have had it replaced at some point. It warns of itself with long cranking and loss of power; the 2010 campaign was US-only.
- Medium severityFrequency: CommonInjectionN54 piezoelectric injector failureThe N54's piezoelectric injectors can clog or leak and cause intermittent misfires. The N55 has solenoid injectors, so it does not share this weak point.
- Medium severityFrequency: CommonTurboTurbo wastegate noise and failureOn the N54 the wastegate rods work loose and produce a metallic rattle; over time they reduce boost pressure. On the N55 it is the electric actuator that fails.
- Medium severityFrequency: CommonCoolingElectric water pump and thermostat failureThe electric water pump on the N54 and N55 fails without warning, at around 100,000-150,000 km, and is usually replaced together with the thermostat. If not dealt with, the engine overheats.
- Medium severityFrequency: CommonLubricationOil leak from the oil filter housing gasketThe oil filter housing gasket on the N54 and N55 leaks oil as it ages; the oil can drip onto the auxiliary drive belt, and there are also leaks from the valve cover.
- Medium severityFrequency: CommonIgnitionOil in the spark plug wells from the rocker cover gasketOn the N54 and N55 the rocker cover gasket hardens with age and lets oil seep into the spark plug wells. Guides treat it as a known fault: it smells of burnt oil and can damage spark plugs and coils.
BMW N52 / N53 engine in the 2009 BMW Z4
Names: Z4 sDrive23i · sDrive30i
- With caution
N52B30 3.0 (2004-2015)
215–268 hp · N52B30, N51B30
Same weak points as the N52B25; units from before the end of 2008 may have noisy hydraulic lifters.[8][9]
Faults that affect 2009 cars
- Medium severityFrequency: CommonCoolingElectric water pump and thermostat failureThe N52's plastic electric water pump cracks or fails sooner than a mechanical one, and the thermostat usually goes with it; it is recommended to replace it as a precaution at around 80,000-100,000 km.Repair (garage): €350–€600Appears at around 80,000 km
- Medium severityFrequency: CommonLubricationOil leak from the oil filter housing gasketThe oil filter housing gasket hardens over time and leaks oil on all N52 engines; the leak can soil the engine and damage nearby parts.
- Low severityFrequency: CommonLubricationValve cover and crankcase ventilation valveThe N52's plastic valve cover cracks with heat cycles and the crankcase ventilation system fails, causing whistling, leaks and oil consumption.Repair (garage): €200–€350
Faults outside the engine in the 2009 BMW Z4
- Medium severityFrequency: OccasionalBodywork and interiorRetractable hardtop sensor, actuator and motor failureAccording to the reports collected by fiches-auto.fr, the retractable hardtop on the Z4 E89 can become temperamental: sensors, actuators or motors fail and the roof gets stuck or does not close, with cases at 84,000 and 147,000 km.
- Low severityFrequency: RareElectronics and infotainmentComfort Access and door handle failureAccording to the reports collected by fiches-auto.fr, on the Z4 E89 the Comfort Access handle or antenna can stop communicating with the car, and in some cases the sat nav screen does not fold away.
- Low severityFrequency: RareElectrical systemErratic operation of the frameless window regulatorsAccording to the reports collected by fiches-auto.fr, the frameless window regulators on the Z4 E89 can work erratically, with a risk of water getting in on a convertible.
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Frequently asked questions
Is the 2009 BMW Z4 reliable?
The 2009 BMW Z4 was sold with 2 engines that we have documented: the BMW N54/N55 and the BMW N52 / N53. The BMW N54/N55 has serious faults that affect the cars of that year. The safest option is the BMW N52 / N53 (verdict “With caution”). Outside the engine, 3 documented faults affect 2009 cars, such as retractable hardtop sensor, actuator and motor failure.
What is the best year for the BMW Z4?
According to our score, the best are 2016, 2010 and 2009 (7.2/10). The year with the worst score is 2014 (6.7/10). Each year's score counts only the engines sold that year and the faults that affect those cars.
What faults does the 2009 BMW Z4 have?
The most important ones documented for 2009 cars are: high-pressure fuel pump (HPFP) failure (BMW N54/N55, high severity), n54 piezoelectric injector failure (BMW N54/N55, medium severity), turbo wastegate noise and failure (BMW N54/N55, medium severity), electric water pump and thermostat failure (BMW N54/N55, medium severity) and oil leak from the oil filter housing gasket (BMW N54/N55, medium severity).
Own a 2009 BMW Z4? Tell us what faults you have had and at how many kilometres. Report your fault.
Sources
Every fact on this page links to its source. If you find an error, let us know.
- BMW N54Wikipedia · Other source · consulted 5 October 2026
- BMW USA ruft 130.000 Fahrzeuge mit R6 Biturbo N54 freiwillig zurückBimmerToday · Motoring press · published 26 October 2010 · consulted 5 October 2026 · in German
- BMW N55 Common ProblemsBMW Tuning · Technical documentation · consulted 5 October 2026
- Todo lo que necesitas saber sobre el motor BMW N54High Performance Academy · Technical documentation · consulted 5 October 2026 · in Spanish
- The Definitive Guide to the BMW N54 EngineFCP Euro · Technical documentation · consulted 5 October 2026
- BMW N55Wikipedia · Other source · consulted 5 October 2026
- BMW N55 Typische Probleme und HaltbarkeitGebrauchtwagenberater · Motoring press · published 23 February 2025 · consulted 5 October 2026 · in German
- BMW N52 Engine ProblemsBMW Tuning · Other source · consulted 5 October 2026
- These BMW N52 Years Have The Most ProblemsJalopnik · General press · consulted 5 October 2026