| 1 | 0 | 3 | 4 | 3 | 4 |
2003 BMW Z4 repairs by problem area
Engine (36%)
Transmission and Drivetrain (3%)
Brakes and Traction Control (4%)
Suspension and Steering (11%)
Electrical and Air Conditioning (23%)
Paint, Rust, Leaks, Rattles, and Trim (17%)
Other (6%)
Chart based on 204 repairs.
2003 BMW Z4 engine repair cost distribution
$2500+ (5%)
$1000 - $2499 (5%)
$500 - $999 (9%)
$100 - $499 (52%)
< $100 (30%)
Chart based on 66 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2003 BMW Z4
Engine not specified
| 88000 mi US $325 |
replaced radiator, expansion tank, and lower radiator hose with aftermarket parts. |
2003 BMW Z4 2dr Convertible
225-horsepower 3.0L I6 6-speed manual RWD
| 45600 mi £500 |
Fuel pump failed on freeway. Fuel pump failure. Scary.. |
| 82000 mi US $350 |
Replace cracked MAF boot Replace coil |
| 78500 mi US $300 |
Coolant expansion tank developed a leak. Replaced tank and all hoses. |
| 38000 mi US $3 |
broken hose clamp on engine air intake was fixed |
| 69000 mi US $130 |
replaced valve cover gasket; replaced spark plugs |
| 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 |
| 199000 mi US $400 |
Coolant overflow tank was cracked and leaking. Overflow tank was replaced. |
| 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 |
2003 BMW Z4 2dr Convertible
225-horsepower 3.0L I6 6-speed automated manual RWD
| 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 |
| 51800 mi US $212 |
radiator hose |
2003 BMW Z4 2dr Convertible
225-horsepower 3.0L I6 5-speed shiftable automatic RWD
| 68300 mi US $650 |
Valve cover gasket |
| 69000 mi US $85 |
Thermostat housing had a micro crack resulting in leaking coolant. |
| 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. |
| 78120 mi C $120 |
Sec. air system (2760) |
| 84940 mi C $450 |
Sec. air fault. Replaced Air pump/motor. |
| 44000 mi US $23 |
Replaced valve cover gasket. |
| 31000 mi ﷼2700 |
Replacement of fuel injection - 6 nozzles |
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 |
2003 BMW Z4 2dr Convertible
184-horsepower 2.5L I6 5-speed shiftable automatic RWD
| 35960 mi A $300 |
Replaced DISA valve |
| 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. |
| 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 |
| 23560 mi | main computer acting up..cleared it of all messages and seems ok again. |
| 44640 mi C $140 |
MAF replaced |
| 76000 mi US $300 |
cooling system leak. Had radiator replaced |
| 84000 mi US $40 |
Replaced deflection pulley |
| 79300 mi US $300 |
Engine mounts replaced |
2003 BMW Z4 2dr Convertible
184-horsepower 2.5L I6 5-speed manual RWD
| 52000 mi US $30 |
Replace intake hose |
| 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. |
| 78000 mi US $350 |
Crack in the Fuel Injection rail leaking gas onto the intake manifold. |
| 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 |
| 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. |
| 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) |
| 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. |
| 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. |
| 99000 mi US $150 |
Coolant expansion tank leak (common failure, expected at 100k mi per BMW). |
| 115000 mi US $175 |
Replaced failed coil. |
See TrueDelta's information for all Hatchbacks and Convertibles.
See TrueDelta's information for all BMW models.
