Lot C1159: 2006 Cadillac XLR

The 2006 Cadillac XLR has a few known trouble spots worth knowing about, though with 65,000 miles and described as “mint condition,” this particular car seems to have aged well!

Most Common Issues:

Northstar V8 Engine (4.6L)

• Head gasket concerns — The Northstar has a reputation for head bolts pulling out or head gasket failures, particularly on earlier designs. The 2006 is in the middle production years and less prone than 2004-2005, but it’s still worth monitoring coolant levels and watching for white smoke.
• Oil consumption — Some owners report higher-than-normal oil use. Check for oil spots (pan leaks) and the pink/orange crusty residue that indicates coolant leaks from the water pump crossover assembly.
• Overheating — If the cooling system hasn’t been maintained, overheating can lead to serious engine damage.

Retractable Hardtop

• Hydraulic lift cylinders can develop leaks over time — the complicated roof mechanism relies on these and they’re expensive when they fail.
• The roof can stick in mid-position or refuse to operate, often traced to faulty position switches.
• Early production models had rear window separation issues from the hardtop, though this seems to have been resolved by 2006.

Electrical & Other

• EVAP system (P0446 code) — Can cause check engine lights and difficulty filling the gas tank.
• Parasitic battery drain — A known issue with Delco batteries in this era of Cadillacs.
• Steering sensor failures and dashboard rattles are occasionally reported.

The good news? With just 65,000 miles, this XLR has relatively low mileage for its age. If the owner has service records showing coolant system maintenance and the hardtop operates smoothly, it’s likely avoided the worst of these issues.

Would you like me to help you find similar XLRs to compare, or do you have questions about any of these specific issues?