Buick common problems & weak spots
The most widely documented Buick weak spots in Canada: what breaks, what it costs to fix, and what to inspect before buying used.
Known issues
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Common
1.4T coolant leaks (Encore, 2013\u20132020)
Turbo coolant lines, the water outlet and thermostat housing crack and leak. Watch the temperature gauge and coolant level closely.
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Watch out
3.6L V6 timing chain stretch (LaCrosse, Enclave)
The GM 3.6 V6 stretches its chains, especially with stretched oil-change intervals. A rattle on startup means the chains need attention now.
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Common
Power window and lock actuators
Door lock actuators and window regulators fail with age on 2010s models \u2014 annoying, but cheap to fix at an independent shop.
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Common
Rust in the salt belt (older models)
Older Buicks rust at rockers, wheel arches and brake lines. Get the car on a lift before buying used in Ontario, Quebec or the Maritimes.
Buick Encore
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Common
1.4T cooling system leaks
The Encore\u2019s 1.4 turbo is known for coolant leaks at the water outlet and turbo lines. Low coolant with no visible puddle is the classic sign.
Pick another make
Get it inspected before you buy
A pre-purchase inspection on a lift reveals rust, leaks and hidden problems before you pay for the car.