2003 BMW 3-Series BMW 3-Series 2003

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2003 BMW 3-Series repairs by problem area

Engine (43%)

Transmission and Drivetrain (9%)

Brakes and Traction Control (4%)

Suspension and Steering (15%)

Electrical and Air Conditioning (22%)

Paint, Rust, Leaks, Rattles, and Trim (4%)

Other (3%)

Chart based on 590 repairs.
See TSBs and recalls for the 2003 BMW 3-Series.

2003 BMW 3-Series engine repair cost distribution

$2500+ (2%)

$1000 - $2499 (10%)

$500 - $999 (23%)

$100 - $499 (35%)

< $100 (29%)

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

Chart based on 221 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2003 BMW 3-Series

Engine not specified

55800 mi

C $80
emission control system sensor, over 1,000 to repair, doesnt affect the performance of the vehicle so i said dont fix, and after a day the light went off 

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2003 BMW 3-Series 4dr Wagon

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

124000 mi

US $250
Replace thermostat. 
128000 mi

US $300
Replaced fuel pump and fuel filter 
132000 mi

US $140
Install 2 pre-cat oxygen sensors. 
143000 mi

US $20
Replaced secondary air relay. 
146500 mi

US $20
New lower intake elbow. 
155000 mi

US $260
Replace DISA valve. Replace leaking valve cover gasket. 
163000 mi

US $130
replace 2 after-cat O2 sensors replaced oil filter housing gasket 

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2003 BMW 3-Series 4dr Wagon

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

161600 mi

US $500
Thermostat housing was leaking and needed to be replaced. 
172000 mi

US $450
Emissions system error from faulty sensors. 
192000 mi

US $500
Ignition coils replaced 
84900 mi

C $150
Replaced valve cover gasket and VANOS pistons "O" rings. 
84000 mi

US $300
Intermittent sticking of Thermostat Fault recorded in DME. Secondary Air Pump Control Valve Sticking Open - Fault Recorded in DME. 

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2003 BMW 3-Series 4dr Wagon

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

40000 mi Stalling at cold start. Replaced airfilter 
47000 mi

US $700
SES light on. Codes indicated failed thermostat and O2 Sensor. Both replaced. 
58000 mi

US $325
Valve cover gasket Leak..minor but was dripping on exhaust manifold causing odor in car. 
61000 mi

US $552
Oil Separator was upgraded to cold weather version due to record breaking cold in Minnesota. I upgraded since I have a short commute, Oil Separators can freeze burst. Issue addressed in a BMW TSB. I am planning on asking BMW for reimbursement of repair. 
62000 mi

US $600
Vanos Seal (Device that controls the Valve Timing) failed and turned on check engine light. Car also had misfire at idle. Vanos unit was rebuilt using new seals from Beisan Systems which are more durable than the OEM BMW seals. 
46000 mi Pullies, tensioner in accessory drive replaced in attempt to eliminate rattling noise. Some guy from BMW corp. looked at this and said it's normal for M54 engines. 
181000 mi

US $20
hose to secondary air pump failed 
181000 mi

US $500
fuel pump 
85043 mi

US $1010
water pump, thermostat & housing (2 belts, antifreeze, fan clutch) 
115000 mi

US $581
replaced failed fuel pump (failed in mid-drive, needed towing and car rental) 
118000 mi

US $98
replace starter 
122300 mi

US $100
Error code that basically means any of these: air pollution control valve is faulty, vacuum leak or your motor is falling apart. Air pollution control valve was replaced so vacuum leak exists though the car runs great. 
129000 mi Vacuum leak behind motor, close to pollution control pump 
137000 mi The BMW had an oil consumption problem. It still drove fairly well, but with a little blue smoke out the tailpipe upon heavy acceleration and, recently, a CEL for Bank 1. 

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2003 BMW 3-Series 4dr Wagon

184-horsepower 2.5L I6 5-speed manual RWD

96000 mi Leaking valve cover gasket replaced. Plugs changed.  
110000 mi

US $150
Replaced fuel pump in tank. DIY repair took less than 1 hour. It was weak for several weeks (power down). Then failed to start. 
113700 mi

US $300
Replaced Disa valve in intake and all drive pullies due to squeaking. 
47120 mi

C $500
Engine Valve gasket replaced, there was a slight oil leak developing. (also oil change performed) 
50840 mi

C $140
Thermostat was stuck open, replaced part 
57040 mi

C $200
Water Pump replacement 
69440 mi

C $1000
Coolant:thermostat 
88000 mi Misfire under light throttle, intermittant. 
93500 mi

US $70
Overflow tank leaking, needed replacement. 
100200 mi

US $1200
Stalling and failure to start. Four trips to dealer, he replaced crank position sensor, EWS, fuel pump, and fuel filter. 

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2003 BMW 3-Series 4dr Sedan

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

76000 mi

US $1235
Burning oil smell. Engine valve cover gasket was replaced. No more oil smell now. 
104160 mi radiator was leaking coolant. replaced the expansion tank. 
176000 mi

US $240
2 of the 6 coils were bad, causing the engine to misfire 
95000 mi

US $250
Idler pulley replaced. Idler pulley replaced 
104000 mi

US $400
Broken belt pre-tensioner bearing. 
91700 mi

US $600
Emission Control 
42000 mi Oxygen sensor replacement (check engine light), Seat belt TENS unit replacement (air bag light). All original warranty coverage. 
76000 mi

US $350
Oil filter housing gasket. $290 labor, $10 gasket! 
127000 mi

US $1700
radiator, pump, gasket changed, $1300 oil line, seal ring, filter housing gasket changed 

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2003 BMW 3-Series 4dr Sedan

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

92000 mi

US $600
Belts noisy. Tech replaced belts, checked tensioners (no problems), replaced water pump preventatively, replaced fan clutch because it was no longer working. 
92000 mi

US $166
strong vibration at stop. Replaced plugs and wires; no change. 
106100 mi

US $300
Replaced expansion tank and oil cooler valve. 
112000 mi

US $200
Broken upper radiator hose neck. Upper radiator hose with integrated neck replaced 
117000 mi

US $500
Leaking oil from valve cover gasket and oil filter housing. 
122000 mi

US $650
Rough idle and ses light was on. Replaced air intake valve and other intake plastic parts 
44000 mi

US $50
Coolant sensor needed to be replaced. 
48000 mi

US $600
coolant hose, two engine belts 
77000 mi

US $640
Fan motor died, thermostat replaced. reservoir cracked, was replaced. 
96400 mi

US $4700
Air mass sensor and a variety of other ignition related items replaced as the car would not start/run anymore. 
109000 mi

US $650
O2 sensors needed to be replaced.  Fuel injector failing. 
115000 mi

US $98
O2 sensor replacement 
131000 mi

US $850
Replaced all cooling components. Water pump, expansion tank, fan clutch, both belts upper and lower hoses, radiator, thermostat and transmission thermostat. Clutch went out on fan and causes all components to fail one after the other. Would recommend doing all at once to avoid future problems. 
120000 mi

US $962
In addition repair work was done on the the intake 
42000 mi Secondary air injection pump & valve replacement 
136000 mi

US $450
Oil leak from filter housing gasket Fuel pump. 
149700 mi

US $243
Coolant reservoir leaking 
162000 mi Ignition coil failure, replaced all coils 

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2003 BMW 3-Series 4dr Sedan

225-horsepower 3.0L I6 5-speed manual RWD

46000 mi

US $1000
Water pump failure. 
44000 mi Engine mounts and transmission mounts replaced due to vibration at idle. 
111000 mi

US $300
Cooling expansion tank failed and was leaking. Replaced all consumables. 
118200 mi

US $300
Fuel pump died. Replaced with new OE pump, and replaced fuel filter as preventative maintenance during this time. 
119517 mi

US $300
Intake hoses were ripped/dry rotted. Replaced upper and lower intake hoses, as well as connector and vacuum line. VANOS variable valve timing unit internal seals had failed, causing poor running and rough takeoffs. Replaced seals with aftermarket upgraded Viton parts (from Beisan Systems), changed valve cover gasket, replaced spark plugs with OE NGKs during this time. 
124000 mi

US $80
Repaired original DISA/manifold runner valve with replacement flapper, bellcrank, and seal. Cleaned throttle body (not bad), cleaned ICV. 
34940 mi

US $215
OBD code p0128: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature). Per technician, frequently related to failing thermostat. Asked that thermostat be replaced. No repeat of code since this repair. 
150000 mi

US $500
ECU needed replacing. 
128000 mi Fuel pump failed, pump and filter replaced Air pump replaced 
112500 mi

US $100
Expansion tank was leaking 
70000 mi

US $1100
Service II inspection plus anti-freeze and brake fluid change. Problem was an acceleration issue at ~3000 rpm. Vehicle "misses" at that rpm. Repeat problem, still was not resolved by dealer. (Later fixed with reflash of chip.) 

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2003 BMW 3-Series 4dr Sedan

225-horsepower 3.0L I6 5-speed manual AWD

105000 mi

US $1000
MAF sensors, O2 sensors, MAf replacement wiring issue with chipmunk nest in air filter 
112000 mi

US $200
Fuel pump failed, so I replaced the fuel pump and filter. 
115400 mi

US $200
Driveshaft was rumbling under acceleration load due to failed support bearing carrier. Rear driveshaft center support bearing and carrier replaced and transfer case/transmission mount replaced. 
117000 mi

US $200
Valve cover gasket leaking and replaced. Spark plugs replaced. VANOS seals replaced. 
112300 mi

US $5
Oil filter housing gasket was leaking and required replacement. 
124300 mi

US $80
Water pump replaced because of bad bearing. 
127100 mi Crank position sensor failed. DISA valve rebuilt. Rubber air intake boot torn. 
130000 mi

US $200
CCV/oil separator valve failing and hoses plugged up with oil sludge. (Oil consumption was over 1qt per 1000 miles (previously was 1qt per 3000 miles)) Replaced CCV valve and hoses. 
102000 mi

US $600
Water pump, pulleys, and belts replaced. 
112000 mi

US $400
Secondary air pump failed. Unit replaced. 
109440 mi

C $500
Thermostat 
117180 mi Vanos track system 

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2003 BMW 3-Series 4dr Sedan

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

104000 mi Fuel system was shot. Had to replace tank, pump, filler neck, and filter as they are all one piece. 
108600 mi

US $1310
Complete cooling system. The engine and transmission thermostats had soft failed open. Fan clutch was loose, and water pump would gave probably started to seep in next 5000 miles. Expansion tank was entirely preventative due to it being a common issue. 
114000 mi

US $600
O2 sensors and Mass Air Flow sensor - 
82000 mi Three coils were worn out. Changed without costs. 
72000 mi

US $80
Engine idle revs from 800 to 1200, repeatedly, dangerous surge almost caused accident, brakes barely able to control. Apparently an error in computer, or in throttle body, or in wiring between throttle body and computer. Just went away. 
84300 mi

US $200
Thermostat defective (prob for 2 years). Also replaced water pump, hoses, antifreeze as preventative (but they all looked good despite 84,000 miles). 
86300 mi

US $400
Cooling system leak. Replaced radiator. 
95000 mi

US $50
Oil leak since 65K or so, smoking, leaking onto driveway. Replaced valve cover gasket. Seemed to do the trick. 
106300 mi Leak, oil filter housing 
107200 mi Intermittent outage of fuel pump Leaks in the crankcase oil recirc system were throwing lean codes. Unable to get car inspection. 
122000 mi

US $450
Drive belt, tensioner, pulleys 
16000 mi

US $300
Multiple leaks in radiator. In hoses and overflow tank. 
4960 mi Check engine ligh on, replace oxygen sensors 
18600 mi Engine runs roughly, replace ignition cord 
2480 mi Check engine light on again, replace pre-cat oxygen sensor 
6200 mi Check engine light on, replace oxygen sensor under warranty 
55800 mi

C $350
Replace theromstate 
58900 mi

C $120
Replace lower temperature sender 
186000 mi

US $600
Entire cooling system had to be replaced, radiator, hoses, thermostat, water pump. 
98500 mi

US $35
Replaced valve cover gasket. 
119000 mi

US $800
Oil pan gasket leak, oil filter housing gasket leak 
63000 mi

US $1000
Tension pulley for alternator/water pump replaced. 
89000 mi

US $255
Air control valve repaired and cleaned. 
96000 mi

US $800
Replaced worn pulley and idler set 
100000 mi Squeel, oiginally diagnosed and "repaired"as worn pulleys, was in reality a bad water pump. 
59000 mi

US $700
Thermostat replaced. Inspection II performed 
69000 mi

US $1000
Water pump replaced 
76000 mi

US $500
1. Belts (pulley) 2. air intake valve 
88000 mi Oil leak Coolant leak 
89000 mi

US $400
Coolant tank leak 
84000 mi

US $200
Replaced leaking VANOS oil line. 
88200 mi

US $150
Radiator expansion tank leaked and was replaced. 
79000 mi

US $1000
Engine oil filter housing leaking, replaced with a new housing. 
93500 mi

US $500
The thermostat was stuck open, so I decided to replace the whole cooling system for preventative maintenance. 
98000 mi The check engine light was signaled from a faulty secondary air pump, because this was a M56 engine(SULEV) it has a 15 year/150,000 mile warranty on emission related components (a lot of dealers don't know this) 
130000 mi SES light for secondary air pump, cylinder misfire. 
135900 mi fuel pump died 
157000 mi

US $120
The crankshaft position sensor was replaced 
41000 mi

US $300
Leaking from drain pan 
89600 mi

US $1500
Fixed Oil Leak.  Oil leak fix threw these errors: P0491: Second Air Injection System (Bank 1) and P0492: Second Air Injection System (Bank 2). Replacing vacuum hose fixed the above errors. 
90200 mi Started Check Engine Light. The temperature sensor looks like is going bad. 
103000 mi P0128: Coolant Thermostat not working properly. Coolant leak. Parts worn out. 
65920 mi

C $210
Scan done, misfire cylinder #5, replaced coil and plugs. All ok. 
92380 mi

C $300
Belt tensioners (3), 2 belts 
74000 mi

US $50
Belt tensioner and pulley had to be replaced.  
92000 mi

US $350
thermostat 

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2003 BMW 3-Series 4dr Sedan

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

126000 mi

US $4100
Fan clutch worn and slipping. Replaced clutch. 
73000 mi

US $220
Bad thermometer. Needed replacement. 
81000 mi

US $200
Fuel pump failed. replaced fuel pump and relay  
95700 mi

US $900
replaced fuel vent valve cover gasket leak oil filter housing leak 
94000 mi

US $30
cylinder 5 coil replaced 
130300 mi

US $20
Replaced in warranty thermostat due to failed internal heater circuit 
132000 mi

US $10
Replaced oil filter housing to engine block gasket and oil filter. 
132000 mi

US $233
Replaced pulleys. 
142000 mi Cooling system leak. Replaced expansion tank and transmission thermostat. 
143000 mi

US $168
Fixed coolant leak, replaced expansion tank, mount, water pipe and heater return hose. 
143000 mi Disa valve broke, fixed with G.A.S. repair kit. 
151000 mi Valve cover and gasket replaced. 
155000 mi Reinstalled the transmission thermostat 
156000 mi

US $50
replaced leaking thermostat 
130000 mi

US $165
Rough Idle, replaced mass air flow sensor 
60000 mi

US $2100
Front axle pulled out of differential due to worn engine mounts 
96000 mi

US $500
Suspect a coolant leak. Independant shop recommended radiator flush which they performed but low level light has returned. Engine overheated due to leak in radiator reservoir 
106000 mi

US $350
VANOS pipe leaking oil 
107000 mi

US $680
Replaced (2) of (6) ignition coils 
86000 mi

US $2000
- replaced leaky valve cover gasket 
81300 mi

US $584
Replaced faulty thermostat assembly, also installed new fan. 
105000 mi

US $900
Car needed new fuel pump and filter 
135100 mi

US $1000
Oil leak 
123000 mi

US $1200
3 repairs valve cover and gasket, plugs and coils as well as oil/filter/air filter change. Expansion tank for cooling system. 
140000 mi

US $1100
Failed PCV Valve, Failed Fuel Pump, Failed/Cracked emissions vacuum lines 
98000 mi

US $350
Valve cover gasket 
114000 mi

US $650
Updated software to correct erratic cold-start idle. Oil leak from Oil Filter Housing Gasket 

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2003 BMW 3-Series 4dr Sedan

184-horsepower 2.5L I6 5-speed manual RWD

79000 mi

US $95
Drive belts tensioner failure. 
160000 mi

US $1600
Radiator hose replaced Coolant flushed  
126000 mi

US $50
DISA VALVE REPAIR 
134000 mi

US $300
Noise from front of engine. Replaced Belts & Pulleys (some pulleys were definitely worn).  

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2003 BMW 3-Series 4dr Sedan

184-horsepower 2.5L I6 5-speed manual AWD

130000 mi

US $100
Every 3 or 4 weeks, the car will not start. If you wait a bit more than 4 hours, car will work fine for another 3 or 4 weeks. Shop could not duplicate issue. 

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2003 BMW 3-Series 4dr Sedan

40920 mi

A $2660
PCV valve & Vacuum pipes. Vacuum pump leaking oil. Rocker cover gasket.  
43400 mi

A $28
Leak of coolant from rear of head. Another common problem. Dealer quoted over $500 to replace a $28 plastic cover plate. 
52700 mi

A $1200
Oil separator, valve cover gasket, vacuum pump o ring, oil filter gasket. 
53320 mi radiator expansion tank cracked 
65100 mi

A $20
"O" rings on valve solenoids replaced 
68820 mi

A $50
Car started running on 3 cylinders. Needed a new ignition coil. Was able to source a single non genuine one Instead of whole set dealer wanted to sell me. 
69440 mi

A $10
Leaking VANOS solenoid O-rings replaced 

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2003 BMW 3-Series 2dr Coupe

333-horsepower 3.2L I6 6-speed manual RWD

107760 mi

C $800
Main belt tensioner failed and belt broke. Had to replace all pulley and belts. 
134540 mi

C $750
Replaced thermostat, radiator hoses, fan switch, coolant bottle and fan clutch. All needed replacement. 
77000 mi Thermostat replaced. 
95000 mi

US $700
DISA valve was ticking and needed replacement. 
80480 mi

C $400
Trouble with an injector and a coil. 
30000 mi

US $33
Replaced leaking oil cap. 
47000 mi

US $120
Coil pack failure on one cylinder 
85000 mi

US $900
Leaking oil pan. 
141700 mi

US $900
Fuel Pump and fuel sensor went out. 
126000 mi

US $400
SES light came on... Thermostat replaced, problem solved. 
140300 mi

US $257
EWS needed to be reset, and had to purchase a new key as the old key was no longer communicating with the ignition switch. 
79000 mi

US $100
oil pressure plug on side of engine block needed replacement. 
95500 mi

US $170
Replaced coils due to misfiring & rough performance. 
77000 mi

US $1000
Vanos refurbished 

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2003 BMW 3-Series 2dr Coupe

333-horsepower 3.2L I6 6-speed automated manual RWD

122300 mi

US $75
ignition coil 
125000 mi

US $100
replace #3 cyl ignition coil 
125000 mi

US $200
replace plugs and coils. Inspect valve train and vanos. 
70000 mi

US $180
Cpv constant pressure valve needed replacement 
71000 mi

US $720
Clutch slave cylinder position sensor was intermittent, causing no starts and transmission light to come on.  
79200 mi

US $7
Oil leak at CPV valve. Replaced o-ring. 
79600 mi

US $150
VANOS solenoid valve causing intermittent check engine light. Replaced with remanufactured unit. 

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2003 BMW 3-Series 2dr Coupe

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

64500 mi

US $180
Ignition coil 
67000 mi

US $210
Ignition coil failed 
72000 mi

US $250
An ignition coil went out, for the third time in the past year; I had the mechanic replace the broken one as well as the other three that hadn't yet been replaced 

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2003 BMW 3-Series 2dr Coupe

225-horsepower 3.0L I6 5-speed manual RWD

123000 mi

US $375
Water pump started to go out. Bought an aftermarket one and just paid for labor only. 

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2003 BMW 3-Series 2dr Coupe

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

75000 mi

US $600
Thermostat failed in open position. Replaced thermostat to fix problem. Also replaced other cooling system components as a preventative measure.  
96500 mi Small vacuum line to emissions control device broke. Replaced with new line and problem was resolved. 
88700 mi

US $200
Water pump leaking coolant. 
108000 mi

US $75
Had to replace all crankcase ventilation lines due to leaks. Resolved leaks and poor cold-start performance issue. 
38000 mi The car was shifting harshly down to the final gears. The dealer did a reset and the problem went away. 
52000 mi

US $750
Air intake sensor was damaged. 
108000 mi

US $400
Oil sealant needed replacement 
68000 mi

US $4000
Thermostat 

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2003 BMW 3-Series 2dr Coupe

184-horsepower 2.5L I6 5-speed manual RWD

197100 mi Replaced idler pulley,replaced oil filter housing gasket that was leaking. 

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2003 BMW 3-Series 2dr Convertible

333-horsepower 3.2L I6 6-speed manual RWD

36200 mi

US $625
The engine check light came was apparently due to a bad "post catalytic" oxygen sensor. The part was $248 and the remainder was labor. 

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2003 BMW 3-Series 2dr Convertible

333-horsepower 3.2L I6 6-speed automated manual RWD

88000 mi

US $160
Coil pack 
84500 mi

US $735
Fuel pump and relay 
42090 mi

US $625
replace muffler hangers and voltage regulators 
89000 mi

US $500
needed a new exhaust hangar 

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2003 BMW 3-Series 2dr Convertible

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

133700 mi

US $651
Intake Manifold Adjuster Part $300. Crankshaft Breather Hose Part $19. Intake Boot Part $19. 2nd Intake Boot Part $19. Labor 255. Mileage 133K 
152000 mi Car wanted to stall with air on. Wouldn't pass emissions. Engine code said it was running rich. Turned out to be clogged air filters with bugs. New filters. No more stalling, no more codes. 
161000 mi

US $600
Engine was taken apart, new seals put in, hoses replaced. Self job. Engine still runs a little rough, but no more leaks. 

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2003 BMW 3-Series 2dr Convertible

225-horsepower 3.0L I6 5-speed manual RWD

98660 mi

C $600
Oil leak. New gasket 
114700 mi

C $1000
Replace thermostat and water pump 
117180 mi

C $25
Replaced upper intake hose. Intake boot had visible signs of wear and cracks, but no engine problems or warning lights had resulted yet. 
126480 mi

C $700
Middle muffler replaced due to crack at inlet pipe connection Rubber intake boot crack due to aging 
132060 mi

C $3000
Clutch slipping. Replace clutch and flywheel 
134220 mi

C $300
Vacuum hose nipple to gas filter broken 
145700 mi

C $350
Expansion tank and hose replacement 
180420 mi

C $1800
Frozen pcv, valve leading to cover failure 

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2003 BMW 3-Series 2dr Convertible

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

60000 mi

US $125
New thermostat. Independent shop. 
72000 mi

US $857
Replace valve cover gasket. It was leaking oil over the metal shields producing burning smell inside the cabine. 
78000 mi

US $248
Water pump failed. Replaced with updated one. (metal impeller) Water pump failed. Replaced with updated one (metal impeller) 

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2003 BMW 3-Series 2dr Convertible

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

95000 mi

US $670
Red oil light intermittently flashed, then stopped. No power problems. Car still ran great. Mechanic checked oil level, filter, and oil pressure. No problems. Cluster working too. Determined that the oil pressure switch should be replaced. a quart of oil leaked out during a 24 hr period, had to change shops for reliability. 

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2003 BMW 3-Series Engine Problems

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