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2004 BMW Z4 Recalls, Problems & Maintenance

The 2004 BMW Z4 has no open NHTSA recalls. Owners report 5 recurring issue clusters, led by “Sticky or notchy steering, often in warm weather.” BMW vehicles use Condition-Based Service (CBS) — the dashboard shows each service item with its own remaining mileage and time, calculated by sensors. The schedule below shows BMW's underlying targets. BMW Ultimate Care covers the first 3 years / 36,000 miles of factory-scheduled maintenance on most new vehicles.

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No open recalls on file. NHTSA lists no unrepaired safety recalls for this year, make and model. A recall can be issued at any time, and a specific car can still have one open — check yours by VIN at nhtsa.gov/recalls.

Known issues & problems for this vehicle

What drivers and federal regulators have officially reported about the 2004 BMW Z4.

Reported to NHTSA

Sticky or notchy steering, often in warm weather

STEERING

138 NHTSA complaints · 2013-04 → 2025-02

“When driving the steering is loose or sticky. The problem gets worse when the weather is warm. Sometimes it’s hard to keep the car driving in a straight path. This is scary and dangerous. His occurs whenever the car is driven. Other z4 drivers are having the same problem”
— Owner report, NHTSA ODI #11592383
“Steering is "sticky" with a feel of detents in the steering instead of expected smooth engagement. At highway speeds this is concerning and feels unsafe. Difficult or impossible to steer smoothly”
— Owner report, NHTSA ODI #11478600
“STEERING WAS NOTICED TO BE "NOTCHY" WHILE DRIVING AT HIGHWAY SPEEDS. SEEMS LIKE STEERING IS CAUGHT ON SOMETHING THEN BREAKS FREE”
— Owner report, NHTSA ODI #10730854
“STEERING STICKS WHEN VEHICLE GETS HOT OR SITS IN THE SUN”
— Owner report, NHTSA ODI #10565738

Read all complaints on NHTSA →

GM5 module failure affecting locks, wipers and lighting

ELECTRICAL SYSTEM, EXTERIOR LIGHTING, VISIBILITY/WIPER

4 NHTSA complaints · 2014-07 → 2020-07

“WHEN THE GM5 MODULE FAULS WINDSHIELD WIPERS WON'T WORK (THIS COULD BE A BIG PROBLEM IF IT RAINS!), INTERIOR LIGHTS WON'T WORK, WINDOWS WON'T GO UP OR DOWN, NO ALARM FUNCTIONS AND OF COURSE NO AUTOMATIC DOOR LOCK CONTROL”
— Owner report, NHTSA ODI #11195746
“DID A GOOGLE SEARCH AND FOUND THAT THE GM-5 BOARD NEEDS TO BE REPLACED. I ALSO HEARD THAT THIS GM-5 CAN CAUSE FAILURE ON OTHER FUNCTIONS WITH THE CAR - WIPERS, LIGHTS ETC”
— Owner report, NHTSA ODI #10609504
“I LEFT MY BMW IN THE SUN ALL DAY AND NOW MY LOCKS WONT WORK. MANY RESOURCES LINK THIS PROBLEM TO THE GM5 WHICH CONTROLS THE LIGHTING AND LOCKS”
— Owner report, NHTSA ODI #10743567

Read all complaints on NHTSA →

Steering wheel seizure and loss of power assist

STEERING

29 NHTSA complaints · 2013-05 → 2025-06

“Power steering wheel went out of power during a trip at about 70mph. Yellow light at the dashboard went ON then so, car became imposible to drive or so”
— Owner report, NHTSA ODI #11664730
“WHILE DRIVING 60 MPH, THE STEERING WHEEL SEIZED. THE VEHICLE WAS UNABLE TO BE DRIVEN WHEN THE INCIDENT OCCURRED”
— Owner report, NHTSA ODI #10726007
“AFTER STARTING CAR, EPS LIGHT COMES ON AND STEERING IS VERY TIGHT, NEAR IMPOSSIBLE TO TURN OR MANEUVER IN PARKING LOTS, ETC”
— Owner report, NHTSA ODI #11253232

Read all complaints on NHTSA →

Air bag deployment without a collision

AIR BAGS

6 NHTSA complaints · 2013-07 → 2017-01

“THE CONTACT STATED THAT WHILE PARKED AND SEATED IN THE DRIVERS SIDE OF THE VEHICLE, THE AIR BAG INDEPENDENTLY DEPLOYED”
— Owner report, NHTSA ODI #10836990
“PASSENGER AIR BAG EXPLODED AND BUSTED WIND SHIELD”
— Owner report, NHTSA ODI #10652492
“AFTER THE PASSENGER DOOR WAS OPENED, THE AIR BAGS DEPLOYED INDEPENDENTLY THE FAILURE OCCURRED WITHOUT WARNING”
— Owner report, NHTSA ODI #10946500

Read all complaints on NHTSA →

Air bag warning light and passenger seat sensor faults

AIR BAGS

5 NHTSA complaints · 2014-03 → 2019-01

“PASSENGER SEAT OCCUPANCY DETECTION MAT HAS A DEFECTIVE SENSOR. IT INDICATES THAT A CHILD'S WEIGHT IS IN THE SEAT AND THEREFORE WILL NOT PERMIT THE AIR BAG TO DEPLOY”
— Owner report, NHTSA ODI #11170587
“THE CONTACT STATED THAT THE AIR BAG WARNING INDICATOR ILLUMINATED”
— Owner report, NHTSA ODI #11020554
“THE CONTACT STATED THAT THE AIR BAG LIGHT ILLUMINATED ON THE PASSENGER SIDE”
— Owner report, NHTSA ODI #10611241

Read all complaints on NHTSA →

Issues on other model years

Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Sep 20, 2026. Investigation data refreshed Sep 20, 2026.

We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.

Raw data + downloads for this vehicle →

Essential maintenance

Critical for safety and preventing major damage

Engine Oil Service (CBS)

Every 10,000 mi

Replace BMW Longlife-04 (LL-04) full-synthetic oil and filter every 10,000 miles or annually — whichever the CBS system signals first. M-series engines may require shorter intervals; check the vehicle-specific iDrive screen.

Estimated cost — typical U.S. ranges

Dealer

~$120–$160

Shop

~$85–$115

DIY

~$25–$55

Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.

Brake Fluid Service (CBS)

Every 24,000 mi

Replace DOT 4 LV brake fluid every 2 years regardless of mileage. CBS triggers based on time, not miles, due to moisture absorption.

Estimated cost — typical U.S. ranges

Dealer

~$180–$200

Shop

~$125–$140

DIY

~$10–$25

DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.

Important maintenance

Keeps your vehicle running smoothly and efficiently

Vehicle Check / Inspection (CBS)

Every 30,000 mi

Multi-point inspection covering brakes, suspension, steering, exhaust, fluids, lighting, and underbody. CBS signals every 30,000 miles or 2 years.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Most shops do this free with any paid service. A flashlight and 10 minutes covers the basics yourself.

Engine Air Filter

Every 40,000 mi

Replace engine air filter every 40,000 miles. Higher-performance N55, B58, and S58 engines should be inspected at every oil service.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

5-minute job on most cars; the airbox lid usually has clips, no tools needed.

Spark Plugs

Every 60,000 mi

B48 (2.0L turbo) and B58 (3.0L turbo) require new spark plugs every 60,000 miles. N20/N55 engines often spec 45,000 miles. M-series typically 30,000 miles.

Estimated cost — typical U.S. ranges

Dealer

~$285–$390

Shop

~$200–$275

DIY

~$25–$100

Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.

Automatic Transmission Fluid (ZF 8HP)

Every 60,000 mi

BMW labels the ZF 8HP automatic as 'lifetime fill,' but independent transmission specialists strongly recommend replacement every 60,000 miles. Use BMW-spec ZF Lifeguard 8 — no substitutes.

Estimated cost — typical U.S. ranges

Dealer

~$330–$500

Shop

~$235–$355

DIY

~$60–$180

Some sealed transmissions have no dipstick — fill is precise and best left to a shop. Many drivers can still DIY drain-and-fill.

Rear Differential Fluid

Every 60,000 mi

RWD and xDrive AWD: replace rear diff fluid every 60,000 miles, sooner with M-Sport or active differential. M-cars require BMW SAF-XO synthetic.

Estimated cost — typical U.S. ranges

Dealer

~$150–$195

Shop

~$105–$135

DIY

~$20–$50

Drain plug + fill plug — straightforward DIY. AWD vehicles have two; budget for both.

Recommended maintenance

Extends the life of your vehicle and improves comfort

Microfilter (Cabin Air Filter)

Every 30,000 mi

Replace the activated-carbon microfilter every 30,000 miles. Most BMWs have a single combined cabin/charcoal filter behind the engine bay firewall.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

Usually behind the glovebox. Shops charge labor for a 10-minute job — easy DIY win.

Engine Coolant (G48 / HT-12)

On condition / lifetime

BMW labels coolant as lifetime fill on most modern vehicles. Independent BMW specialists recommend replacement every 4-5 years to prevent water-pump and thermostat housing degradation.

Estimated cost — typical U.S. ranges

Dealer

~$285–$330

Shop

~$200–$235

DIY

~$25–$60

Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.

Fatal crash history & reported problems

Occupant deaths in fatal crashes (FARS)

6 crashes 1990–2024

How the 6 occupant deaths break down

5

driver deaths

1

passenger deaths

6

occupant deaths

Crash years covered: 1990–2024 This model year first appears in 2009 crashes. Older models have had more years on the road to appear in these crashes, so a higher count here does not by itself mean a vehicle is less safe.

FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road. How to read this number

FARS 2024 data is an annual report file. NHTSA revises these records when the final file is published, so this count can change.

Why we show driver deaths too

Every vehicle has exactly one driver seat, so driver deaths line up fairly when you compare one model to another. Occupant deaths include passengers, so a three row SUV can show a higher number than a two seat car simply because it carries more people.

Both figures are plain counts, not rates. A rate would need to know how many of each vehicle are on the road, and that registration data is not public, so we do not publish rates or scores of any kind.

IIHS publishes driver death rates using this same driver only idea, paired with a registered vehicle years denominator we do not have. Their rates and these counts answer different questions, so do not read either number here as a safety rating.

Owner-reported problem signals

Separate from the federal fatality data above: complaints owners filed with NHTSA about this year and model. These are reports of problems, unverified, and are counted here only as signals.

1

complaints mentioning a crash

2

complaints mentioning a fire

Reviewed known issues for this vehicle

Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.

How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.

This maintenance schedule for the 2004 BMW Z4 reflects BMW's published service intervals and the Condition-Based Service system. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.

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