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2003 Cadillac CTS Engine Problems

121 TrueDelta members own a 2003 Cadillac CTS. 26 of these members (21.5%) have reported engine repairs for their car. A total of 67 engine repairs to 2003 Cadillac CTSs--an average of 0.6 per vehicle--have been reported.

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 2003 Cadillac CTS problems occur, check out our car reliability stats.

Chart based on 136 repairs.

2003 Cadillac CTS engine repair cost distribution

Chart based on 32 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Non-members can see only ten 2003 Cadillac CTS repair histories. Log in or join us to see them all.

2003 Cadillac CTS 4dr Sedan

220-horsepower 3.2L V6 5-speed automatic RWD

89000 mi US $500 Thermostat replaced. 
94000   Oxygen sensor, bank 2 #2 
97000   Replaced valve cover gasket, and resealed. Leaking oil had previously damaged the oxygen sensor replaced at last visit. O2 sensors cleaned and replaced. Same O2 sensor dropped a code on the way home - O2 sensor re-replacement pending. 
98000   Oxygen sensors re-replaced. No further codes. 
100000   Replaced lower intake gasket and PCV hose for the oil leak that continued after the last repair. Re-replaced gaskets as needed for access. 
118000   New water pump 
68200 C $100 car would not start in the morning, brought it into the shop and found that there was spark and fuel so had to be a sensor. Crank sensor failure. 
147000 US $1500 valve cover gasket and sending unit leak, power gear leak thermostat stuck open throttle body adjustment 
45000   Crankcase sensor went out. 
61295 US $625 Electronic Control Module 
64000   Blown water line. Had a major replacement of all rubber under the hood: timing belt, water pump, all hoses, valve cover gaskets. 
71300 C $100 Also small oil leak,rocker cover gasket needed to be replaced and ordered, also warrenty. 
78740   Crank position sensor, cheap repair,common prob wit 3.2L,car wouldnt start,key stays turned to start by itslef then gives up,several attempts,let sit for 1hr car started and drove it home, next day drove to the shop and had it repaired 
80600   Thermostat 
33356   slightly rough idle, brought rpm's up to about 750-800, seemed to help quite a bit.If it holds at those rpm's and computers don't re-adjust. 
75020 C $520 Long time for heater to throw heat. Figured it was the thermostat. Took to dealer and got P128 fault. Thermostat replaced and intake manifold gaskets replaced b/c had to be removed to make repair. Decided to replace spark plugs also. 
46500 C $495 thermostat broken. Seal and thermostat on backorder, had to take vehicle back at a later date. 
46500   Thermostat broken. Seal and thermostat on backorder, had to take vehicle back at a later date. Month: December 2007 outcome, ordered parts. 
64000   Needed new water pump. 
73780 $80 Throttle body replacement 
75640   small engine cooler inside the engine leaked radator water, need to be replaced part cost US$ 180 labour charge US$ 70. 
84940   Replacement of cranck sensor. Radiator repair. 
88040   Overheat problem, Mechanic replaced the thermostat, it took one week to get the part, no problem after part replacement. 

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2003 Cadillac CTS 4dr Sedan

178-horsepower 2.6L V6 5-speed automatic RWD

39060 mi $1200 Fire under the hood while driving. Oil leak from head gasket detected. Had to replace head gaskets, the cover, burned wires and vacuum hose. Waited 3 weeks for parts to arrive. 
41540   Replaced head gasket covers. 
62000   Generator belt broke in the middle of drive. The promlem was caused by tensioner falling apart. The car had to be towed as one belt is used for steering, AC, generator and water pump. Do not neglet routine maintenance to avoid such a hassle 

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