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BMW
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N20 and N26 4-cylinder turbo engines (timing chain guide failures).
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N47 diesel engines (severe chain stretch, often requires engine-out repair).
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Audi / Volkswagen (VW Group)
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2.0 TSI / TFSI EA888 Gen 1 & Gen 2 (2008–2012, stretched chains, bad tensioners).
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1.4 TSI early versions.
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General Motors (Chevrolet, Cadillac, GMC, Buick, Opel, Saab)
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2.4L Ecotec (2006–2012, chain wear common).
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3.6L HFV6 / High Feature V6 (2007–2012, chain stretch due to oil issues).
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Cadillac SRX, CTS, Buick Enclave, GMC Acadia, Chevy Traverse affected.
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Mini (BMW-owned)
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R56 Cooper S (1.6L turbo, “death rattle” chain/tensioner issues).
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Nissan / Infiniti
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VQ35 and VQ37 engines (tensioner shoe wear, chain noise).
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QR25DE (2.5L, some years prone to stretch).
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Juke 1.6 turbo had premature chain wear.
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Ford / Lincoln
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3.5L & 3.7L Cyclone V6 (EcoBoost and non-turbo) had timing chain stretch issues, especially with poor oil maintenance.
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1.0L EcoBoost 3-cyl (timing belt-in-oil, but some chain/tensioner complaints in others).
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Mercedes-Benz
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M271 1.8L Kompressor and CGI engines (timing chain stretch, balance shaft gear wear).
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Hyundai / Kia
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Less common, but some Theta II GDI engines (2.4L/2.0T) reported chain wear when oil change intervals were neglected.
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為啥被拉長
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Long oil change intervals (chains rely heavily on proper lubrication).
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Low-quality oil or sludge buildup.
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Weak or defective chain tensioners.
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Poor chain material/design in some engines.
用好合成機油
