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Six hundred forty-five dollars and no/100
Check every 6-8 months.
The 2004 E63/E64 BMW 645ci has the N62B44 V8 engine, which uses a timing chain, not a timing belt.
I know that my BMW 645 CI 2004 has a chain. Not a timing belt. If you have a chain then you change it only if you here noise (rattle) as chain gets longer over the time. Usually you don't have to change on normal car but you may change on 645 as there is a lot of power. You can check if you have chain or belt by opening a cap where you fill your engine oil.
The factors of 645 are: 1, 3, 5, 15, 43, 129, 215, 645.
645 kilolitres = 645 000 litres1 kL = 1000 L
The divisors of 645 are: 1, 3, 5, 15, 43, 129, 215, 645.
645 + 50 = 695
A 645-gon
645 = DCXLV
645 - 19 = 626
1006