BMW Z4 BMW Z4

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BMW Z4 repairs by problem area

Engine (31%)

Transmission and Drivetrain (6%)

Brakes and Traction Control (3%)

Suspension and Steering (11%)

Electrical and Air Conditioning (26%)

Paint, Rust, Leaks, Rattles, and Trim (17%)

Other (5%)

Chart based on 714 repairs.
See TSBs and recalls for the BMW Z4.

BMW Z4 engine repair cost distribution

$2500+ (5%)

$1000 - $2499 (13%)

$500 - $999 (14%)

$100 - $499 (35%)

< $100 (34%)

Worried about potential repair costs? An extended warranty can provide peace of mind.

Chart based on 197 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2011 BMW Z4 2dr Hardtop conv.

turbocharged 300hp 3.0L I6 7-speed automated manual RWD

45000 mi Replace the fuel injectors 

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2011 BMW Z4 2dr Hardtop conv.

turbocharged 300hp 3.0L I6 6-speed manual RWD

70000 mi

US $150
Bank 2 O2 sensor failed; replaced both pre-cat sensors. 

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2008 BMW Z4 2dr Hatch

330-horsepower 3.2L I6 6-speed manual RWD

18000 mi

US $1600
Oil analysis discovered that the connecting rod bearings were worn (43PPM lead). This is a known issue on the S54 engine. 

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2008 BMW Z4 2dr Convertible

255-horsepower 3.0L I6 6-speed shiftable automatic RWD

16200 mi Replaced mass air filter, serviced fuel injectors, replaced valve cover and vacuum hoses, and replaced O2 sensor, which finally fixed the rough cold running. 

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2008 BMW Z4 2dr Convertible

255-horsepower 3.0L I6 6-speed manual RWD

27000 mi Replace O2 sensor (bank 2, sensor 1) PCV heater valve recall 
26000 mi PCV valve heater replaced under recall. 

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2007 BMW Z4

Engine not specified

13000 mi Oil Pan plug leaking- oil pan replaced 

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2007 BMW Z4 2dr Hatch

330-horsepower 3.2L I6 6-speed manual RWD

71000 mi

US $600
Broken motor mount, passenger side. 
78600 mi

US $1800
replaced rod bearings 
27000 mi Very loud metal on metal scratching noise at startup and sometime when clutch is depressed. Dealer would not replicate problem. 
24000 mi

US $58
Throttle cable bracket broke causing engine to go into safe mode. 
51000 mi

US $75
O2 sensor 
71000 mi

US $90
Thermostat replaced 
49000 mi

US $1800
Rod bearings replaced for wear, typical with S54. Valves adjustment checked no shims req'd. 
28500 mi

US $75
Thottle sensor control--software issue (TSB). Fixed by indie shop as the software flash was cheaper than spending time taking it to the dealer. 
49000 mi

US $25
Oil change and oil testing. Blackstone analysis shows bearings and engine with very low wear after 30 track days 
51000 mi leaky valve cover gasket. Wasn't charged as it had been replaced during Inspection II and shouldn't have been leaking already. 
21000 mi The engine mount bolts had to be replaced 
43000 mi

US $900
Had to replace an ignition coil on #1 Cylinder. Dealer recommended replacing all the rest as well since labor charge is the same for 1 vs 6 

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2007 BMW Z4 2dr Hatch

255-horsepower 3.0L I6 6-speed shiftable automatic RWD

87500 mi

US $100
Bad fuel injector replaced with a new one 
90300 mi

US $575
Replaced eccentric shafts sensor and motor 
99000 mi

US $134
#6 fuel injector 

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2007 BMW Z4 2dr Hatch

255-horsepower 3.0L I6 6-speed manual RWD

62000 mi

US $400
SES light activated. VANOS solenoids replaced per service bulletin accessory drive belt showing wear. Tensioner found to be worn and out of alignment. Tensioner and belt replaced. 
11000 mi Hydraulic valve lifters making excessive noise. TSB had been written by BMW but only used if customer complains. 
12000 mi First solution did not fix valve lifter problem. Final solution was to replace the cylinder head, which BMW volunteered to do in this situation. Very pleased with the final outcome of this repair. 

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2007 BMW Z4 2dr Convertible

330-horsepower 3.2L I6 6-speed manual RWD

57200 mi Coolant hose leak 
62300 mi

US $300
Dealer had to fix third party mistake, water pump pulley misaligned, ruined belt and water pump, both replaced. 
98000 mi

US $869
Misfire on cylinder 6. Car running very rough. Replace all plugs and coils (typical of a 100k mile service) 
102000 mi

US $350
Right side motor mount and one of the two bolts broke. 
25100 mi

US $50
Noises fuel pump 

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2007 BMW Z4 2dr Convertible

255-horsepower 3.0L I6 6-speed shiftable automatic RWD

29760 mi N52 exhaust lifter replacement under warranty. http://www.rtsauto.com/bmw-e90-valve-train-lifter-ticknoise/ N52 exhaust lifter replacement under warranty. http://www.rtsauto.com/bmw-e90-valve-train-lifter-ticknoise/ 
31000 mi Head gasket oil leak 

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2007 BMW Z4 2dr Convertible

255-horsepower 3.0L I6 6-speed manual RWD

113000 mi

US $913
Water pump failed. Pump is electrically boosted, and this wasn't achieving proper speed, resulting in engine overheating. Thermostat was replaced for good measure, because it has to be removed anyway to get to the pump. 
141000 mi

US $1684
Clutch replacement. It was starting to slip. With 140k miles on it, I concluded it was starting to wear out and opted to replace. 
34000 mi

US $3540
Belt tensioner leaking, replacement advised. Did not repair at this time. 
34200 mi

US $2695
belt tensioner leaking and was replaced. 
2800 mi outside temperature sensor failed 

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2007 BMW Z4 2dr Convertible

215-horsepower 3.0L I6 6-speed shiftable automatic RWD

36000 mi fuel cannister and pcv valve 
66000 mi

US $150
Solenoid dirty, cleaned and changed oil 
51000 mi

US $100
Coolant light came on 
52000 mi Check engine came on, rough idle 
52000 mi Engine studdering, pull codes and order coil to test, bad coil on #2 
57000 mi

US $200
Replaced accessory belt 

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2007 BMW Z4 2dr Convertible

215-horsepower 3.0L I6 6-speed manual RWD

90000 mi

US $200
Replaced coolant expansion tank. 
95000 mi

US $1500
Water pump failed, replaced pump, thermostat, and a hose. 
116700 mi

US $700
Valve cover gasket leaking oil. 
121000 mi

US $800
Coolant expansion tank had to be replaced.  Oil filter housing and cooler gaskets were leaking. 
73000 mi

US $3500
Cam timing thingy, Sensor leak, Inspection II, 

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2006 BMW Z4 2dr Hatch

330-horsepower 3.2L I6 6-speed manual RWD

59000 mi

US $600
fuel pump and filter 
61000 mi

US $1800
Constant Oil Pressure Valve leak. 

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2006 BMW Z4 2dr Hatch

255-horsepower 3.0L I6 6-speed shiftable automatic RWD

78800 mi

US $150
replaced coil cylinder #5 
102800 mi

US $1200
new radiator resevoir hoses theromstat and water pump 

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2006 BMW Z4 2dr Hatch

255-horsepower 3.0L I6 6-speed manual RWD

60000 mi

US $475
Replaced air mass sensor 
62500 mi

US $1978
Water pump, thermostat, temperature sensor replaced. Water pump was preventives. When other two failed car overheated and had to be towed. 
65200 mi

US $870
Expansion tank exploded, dumping all coolant. Probably result of faulty cap. 

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2006 BMW Z4 2dr Convertible

330-horsepower 3.2L I6 6-speed manual RWD

39000 mi

US $1000
During Inspection 1 service, an oil leak was found and thought to be from the constant pressure valve - turned out that the head gasket was the source, and that was replaced. 
56000 mi

US $401
Car will stall on cold starts and sometimes while sitting after warmed up. Drive belts had some visible cracks. 
35000 mi

US $179
cleaning of fuel injectors 
65500 mi

US $780
Replace passenger-side broken engine mount bolts, engine mount bracket and rubber mount seats. 
72300 mi

US $2000
Oil cooler leaking. 
104000 mi

US $5200
Cracked VANOS hub, replaced. Hoses,  o2 sensors, replaced inspection 1 and 2 items 
41343 mi

US $267
No start. New key relay 

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2006 BMW Z4 2dr Convertible

255-horsepower 3.0L I6 6-speed shiftable automatic RWD

20000 mi Lifter noise, replaced lifters. 

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2006 BMW Z4 2dr Convertible

255-horsepower 3.0L I6 6-speed manual RWD

57300 mi

US $160
Coil replaced. 

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2006 BMW Z4 2dr Convertible

215-horsepower 3.0L I6 6-speed shiftable automatic RWD

33000 mi Engine making ticking noise. All lifters and related parts replaced. Known problem 
36000 mi Replacement of vehicle head assembly 
77000 mi

US $20
I couldn't start the car intermittently; I would jump the battery and it would start or so I thought! I bought a new battery but the problem persisted. It turned out to be a failing ignition coil which I replaced with one I bought on ebay. 
78000 mi

US $500
The water pump failed which required replacement of the pump, thermostat, and coolant reservoir. 
28200 mi Replaced lifters to solve problem of ticking noise.  
19000 mi Ticking sound from engine after short trips. Head replacement approved and parts ordered. 
22000 mi head replacement to correct ticking sound 
26000 mi Valve tapping when cold. Shop replaced all exhaust side hydr. valve pushrods 
73000 mi

US $250
Car will not start replaced starter still same problem now have EML and check engine light. Will need to check trouble codes. 
73700 mi

US $554
No start, shop found "EWS" module bad, had to order from BMW and reprogram. The longest time was waiting for part to arrive. Actual labor was less then 4 hours. 
83000 mi Leaking valve cover 

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2006 BMW Z4 2dr Convertible

215-horsepower 3.0L I6 6-speed manual RWD

94600 mi

US $238
Replaced oil filter housing and gaskets 
13000 mi Valve lifter problem 
14000 mi Valve noise, BMW performed hydraulic valve "flush" per an TSB. 
19200 mi Replace valve lifters.....ticking noise when cold or after short trips 
59000 mi

US $1900
The engine's fan started to run after being turned off, then a day later the engine thermostat was in the 'red' area 
36000 mi

US $50
Head was replaced due to ongoing lifter tick problem, covered under CPO warranty. 

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2005 BMW Z4 2dr Convertible

225-horsepower 3.0L I6 6-speed manual RWD

96000 mi

US $500
Coolant overflow tank. 
96000 mi

US $1400
Oil lines, oil filter housing 

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2005 BMW Z4 2dr Convertible

225-horsepower 3.0L I6 6-speed automated manual RWD

49000 mi

US $500
Spark plugs all six blew 
52000 mi

US $1400
Gaskets leaking and oil pan replacement, along with I had an inspection II done. That is why it was so expensive with labor and the parts. 
70000 mi

US $8000
Engine fell out, pistons and headers all needed work. This was the worst damage they have ever seen. 
100000 mi

US $8000
Another year another engine. It fell out again on the interstate. Hopefully it stays in this time. 

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2005 BMW Z4 2dr Convertible

225-horsepower 3.0L I6 5-speed shiftable automatic RWD

79000 mi

US $1400
differential, coolant, and brake fluid flush and change, upper and lower radiator hoses replaced radiator expansion tank replaced 
949 mi Fuel pump & sensor were replaced. 
6206 mi Car idle was slow, car felt like it was stalling, said there was no problem 
8079 mi Fuel pump making noise again, service could not duplicate. Was not fixed. 
12051 mi Fuel Pump making loud noise, BMW sent service rep to my home, took it to BMW, 2nd fuel pump was installed. CD player making noise, no fix was made. 
84000 mi

US $675
Valve cover gasket has small leak 
97000 mi

US $2200
One morning my vehicle could barely start and keep idle. The turn about was sudden as the day before the vehicle ran perfectly. I sent the vehicle to the dealership and was informed that the DME computer failed and had to be replace and reprogramed. 
102388 mi

US $406
As part of the repair, I also had to replace valve cover gasket. Replaced leaking oil filter gasket 
102846 mi

US $56
Replaced engine drive belt 
113009 mi

US $306
Replace coils and sparkplugs 
115330 mi

US $811
Replaced leaking oil pan gasket. Replaced cracked air intake boot. 
75300 mi

US $400
Belts worn. Replaced both AC and alternator belts. Oil leaks visible from VANOS oil pressure tube. Replaced VANOS oil pressure tube. Engine valve cover gasket leaking, replaced valve cover gasket. 
92000 mi

US $15
Ignition switch started not working intermittently, replaced ignition switch. 
57000 mi

US $268
Crumpled heat shield around exhaust caused harmonic rattle. Replaced heat shield. 
68000 mi

US $1610
Low oil light lit after engine shutdown. Diagnosed as faulty oil level sensor. Replaced sensor. 
101000 mi

US $761
Cracked air intake boot. Replaced boot. Oil housing leak. Replaced Oil housing gasket and oil pipe. 
102080 mi

US $1975
Engine ran rough. Ignition misfire codes. Replaced all plugs and coil packs. 

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2005 BMW Z4 2dr Convertible

184-horsepower 2.5L I6 5-speed shiftable automatic RWD

90400 mi

US $90
cooling overflow tank cracked. replaced tank and coolant. 

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2005 BMW Z4 2dr Convertible

184-horsepower 2.5L I6 5-speed manual RWD

64000 mi

US $200
Oxygen sensor needed to be replaced 
54000 mi

US $300
Lower radiator hose and sending ubit Valve cover gasket 

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2004 BMW Z4 2dr Convertible

225-horsepower 3.0L I6 6-speed manual RWD

60000 mi

US $149
Service Engine Soon light turned on. After reading the trouble codes myself with a generic OBD-2 tool I repaired the problem by replacing both upstream O2 sensors. Probably only one sensor was actually bad. 
73000 mi

US $53
Valve cover gasket had a slight oil leak -- I replaced the gasket set and associated sealing grommets. I'm sure an experienced mechanic could have done this in much less time than the 3 hours it took me. 
96000 mi

US $43
There was a small coolant leak where one of the coolant hoses mates with the expansion tank. I replaced the hose ($43). Also preemptively replaced the expansion tank ($85), tank cap ($17), level sensor ($16) and coolant ($21). 
98200 mi Intake boot had a couple cracks and was replaced. 
109300 mi

US $7
Minor oil leak -- replaced oil filter housing gasket. 
44700 mi

US $500
Erratic tire warning light, oil light stayed on after ignition was turned off, standard oil change, wiper blade replacement and 2 tires (rear), I'm getting almost 22,000 on the head for my Continental 3's, much lower than my 328ci 
26040 mi Engine cooling system (radiator, water pump, thermostat, heater core, etc.), repair 
37300 mi

C $500
Valve cover gasket replaced 
40300 mi

C $1200
Change belt - cracks observed and change water pump (anticipatory) 
27458 mi Coolant temperature sensor on lower radiator hose shorted out and was replaced 
38440 mi

$150
compressor belt tensioner spring replaced 
66340 mi

C $200
Replaced both the Intake Air Adjustment Unit/DISA Valve and the Lower Intake Boot due to wear 

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2004 BMW Z4 2dr Convertible

225-horsepower 3.0L I6 6-speed automated manual RWD

92000 mi

US $550
I am having coolant temperature problems with the gauge moving from the center to red zone. 
95000 mi

US $567
I needed a tune-up. 

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2004 BMW Z4 2dr Convertible

225-horsepower 3.0L I6 5-speed shiftable automatic RWD

63200 mi

US $450
Thermostat housing 
53000 mi

US $500
replaced worn accessory belts. 
54000 mi

US $1000
Coolant leak. Replaced radiator, and expansion tank. 
76000 mi

US $235
Also diagnosed two oil leaks, one from valve cover, and one from the oil pan. 
78000 mi

US $1000
Oil leak. Oil pan gasket replaced. 

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2004 BMW Z4 2dr Convertible

184-horsepower 2.5L I6 5-speed shiftable automatic RWD

160000 mi

US $10000
Engine overheated and had to be completely replaced. 
76600 mi

US $945
Replaced one coil pack and all 6 spark plugs 
81300 mi

US $1228
Lower intake boot cracked. Coded P0171 lean fuel trim. Replaced lower intake boot. 
55000 mi

US $400
replaced cracked coolant expansion tank and mountng bracket. 
76500 mi

US $300
Replaced 1) leaking water hose and, 2) leaking thermostat and housing. 
114000 mi

US $50
Check Engine Light - Cyl 02 misfire. Replaced plug (original) and Coil pack. 
144000 mi

US $50
Replaced leaky oil filter housing gasket, brittle oil pressure switch, and gasket ring. 
170000 mi

US $475
Idler pulley broke causing belt to snap and sever radiator hose. 
28186 mi Ignition coil replacement 

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2004 BMW Z4 2dr Convertible

184-horsepower 2.5L I6 5-speed manual RWD

35000 mi

US $1700
Service Engine light was on.Two faults were found;defective fuel breather valve and a defective instrument cluster that was not communicating with the engine computer.Steering no longer "sticky" or "binding". 
131500 mi

US $1025
Oil pan gasket bad Vacuum leak 

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2003 BMW Z4

Engine not specified

88000 mi

US $325
replaced radiator, expansion tank, and lower radiator hose with aftermarket parts. 

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2003 BMW Z4 2dr Convertible

225-horsepower 3.0L I6 6-speed manual RWD

73000 mi

US $450
Oil filter housing was cracked and leaking. had to be replaced. 
92400 mi

US $250
Thermostat failed Ignition coil failure 
94300 mi

US $280
coolant overflow tank cracked resulting in loss of coolant 
78500 mi

US $300
Coolant expansion tank developed a leak. Replaced tank and all hoses. 
82000 mi

US $350
Replace cracked MAF boot Replace coil 
82000 mi

US $150
Large evaporative leak code 0455 - fixed by replacing the gas cap and some vent hoses. 
109400 mi

US $100
Very slightly leaky oil separator valve, replaced with ancillary hoses. Pretty simple once I figured out how it's assembled. 
118000 mi Small oil leak at oil pan gasket; replaced gasket. Proper replacement requires supporting the engine from the top and dropping the subframe - time consuming. 
121000 mi

US $40
Secondary air pump died at 121,000 miles triggering check engine light. Replaced pump and hoses. 
138000 mi Had to replace valve cover gasket, #1 ignition coil and DISA valve to fix misfiring at idle 
160000 mi

US $30
Slight oil leak in the front of the valve cover, replaced gasket 
38000 mi

US $3
broken hose clamp on engine air intake was fixed 
69000 mi

US $130
replaced valve cover gasket; replaced spark plugs 
199000 mi

US $400
Coolant overflow tank was cracked and leaking. Overflow tank was replaced. 
45600 mi

£500
Fuel pump failed on freeway. Fuel pump failure. Scary.. 

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2003 BMW Z4 2dr Convertible

225-horsepower 3.0L I6 6-speed automated manual RWD

51800 mi

US $212
radiator hose 
16000 mi

US $600
anti freezer leaking from the front of the engine, considering the age I replace, water pump, water out let and all hoses 

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2003 BMW Z4 2dr Convertible

225-horsepower 3.0L I6 5-speed shiftable automatic RWD

78120 mi

C $120
Sec. air system (2760) 
84940 mi

C $450
Sec. air fault. Replaced Air pump/motor. 
68300 mi

US $650
Valve cover gasket 
69000 mi

US $85
Thermostat housing had a micro crack resulting in leaking coolant. 
44000 mi

US $23
Replaced valve cover gasket. 
31000 mi

﷼2700
Replacement of fuel injection - 6 nozzles 
48000 mi

US $850
Coolant leak. Not the radiator, but new thermostat, hoses, temperature sensors, and new overflow bottle cap. I probably got took to the cleaners. I should have looked more for the leak location and possible causes. 

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2003 BMW Z4 2dr Convertible

184-horsepower 2.5L I6 6-speed automated manual RWD

95000 mi

US $263
Replace dead battery, Replace air intake tube that cracked causing whistle 

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2003 BMW Z4 2dr Convertible

184-horsepower 2.5L I6 5-speed shiftable automatic RWD

56000 mi

US $300
Engine mounts replaced 
84000 mi

US $40
Replaced deflection pulley 
35960 mi

A $300
Replaced DISA valve 
79980 mi

$160
Replaced DISA Valve 
81220 mi

$40
Valve Cover Gasket Replacement 
82543 mi

$150
Replaced water pump, thermostat, belts, hoses 
82770 mi

$250
Replaced leaking radiator, expansion tank and mounting bracket, cap, transmission thermostat 
76000 mi

US $300
cooling system leak. Had radiator replaced 
23560 mi main computer acting up..cleared it of all messages and seems ok again. 
44640 mi

C $140
MAF replaced 
67000 mi

US $35
Faulty Coil on Plug (COP) on cylinder no. 5. Replaced with new COP 
67200 mi

US $150
Coolant leak. Replaced both hoses and coolant temp sensor. 

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2003 BMW Z4 2dr Convertible

184-horsepower 2.5L I6 5-speed manual RWD

59000 mi

US $40
replaced boot from intake to throttle body 
63900 mi

US $145
Replaced cooling expansion tank and hoses 
69000 mi

US $200
Replaced DISA in intake. 
75000 mi

US $35
replaced camshaft position sensor 
84000 mi

US $790
Leaking Radiator 
110000 mi

US $46
Oil leak, Replaced valve cover gasket. 
119000 mi

US $1100
replace cracked Thermostat housing and all cooling hoses and serpentine belt 
70000 mi

US $55
Started after sitting a few days, severe engine knocking and vibrations occurred. Might have been ignition coil failure in one cylinder. When drive to shop, engine ran fine. Shop inspected; I decided not to replace since holidays/$ short. 
90500 mi

US $175
Crack in coolant expansion tank. Had to replace tank and associated parts. 
93620 mi The car has also developed a minor oil leak from the valve cover gasket, more of an annoying smell now and again than anything but I have the parts ordered. 
96100 mi

C $95
Replaced water pump.. should have also replaced a few rad hoses on spec but will keep an eye on things. 
96100 mi

C $75
Car was leaking coolant over time. Replaced top and bottom rad hoses, and engine coolant temperature sensor. Quite possibly could have gotten away with replacing the o-ring on the sensor and fixed things, but these hoses are getting older. Noticed the car was smoking on the exhaust manifold. Valve cover gaskets failing. Replaced valve cover gaskets, all good now. 
99000 mi

US $150
Coolant expansion tank leak (common failure, expected at 100k mi per BMW). 
115000 mi

US $175
Replaced failed coil. 
52000 mi

US $30
Replace intake hose 
99800 mi

US $200
I can only select one radio button?? What if two things are broken? Bad alternator. Bad convertible top motor- not repaired 3 weeks apart 
165300 mi

US $3000
Bad fuel injectors. All replaced. Leak in coolant fluid lines Engine thermostat faulty, replaced. 
78000 mi

US $350
Crack in the Fuel Injection rail leaking gas onto the intake manifold. 
82660 mi

A $150
Car kept overheating, changed coolant, pressure tested system, still overheated. Ran engine and added additional coolant, problem resolved. Suspect air lock in system. 
102920 mi

A $150
Coolant level warning light, loss of coolant. 
105400 mi

A $150
Replaced bottom radiator hose after discovering a small leak. 
216000 mi

US $590
experienced an intermittent radiator indicator light on the control panel. Finally belt broke requiring a tow and r/r of waterpump *and associated parts were replaced although not broken) 
229000 mi

US $1490
progressive oil leak required the valve cover gasket to be removed and replaced 
243000 mi remove and replace cracked Oil housing radiator had a small crack 
255000 mi

US $142
Removed & replaced cracked upper radiator hose (OEM) 
83000 mi

US $8000
Expansion tank cracked, R&R expansion tank and water hoses  valve head cover leaking oil R&R cover seal 
94000 mi

US $200
Disa valve 
99000 mi

US $1000
Engine oil filter housing "o" ring replaced due to a leak 

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BMW Z4 Engine Problems

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently BMW Z4 problems occur, check out our car reliability stats.