For vehicles without statutory lifespan (such as motorcycles and cars), there is no limit to how many times you can renew the COE so long as the COE is renewed for 10 years. However, if you choose to renew the COE for 5 years, you must deregister the vehicle upon the expiry of the 5-year COE, as no further renewal of the COE is allowed.
For vehicles without statutory lifespan (such as motorcycles and cars), there is no limit to how many times you can renew the COE so long as the COE is renewed for 10 years. However, if you choose to renew the COE for 5 years, you must deregister the vehicle upon the expiry of the 5-year COE, as no further renewal of the COE is allowed.
Source:LTA
https://www.motorist.sg/article/128/car-coe-renewal-how-long-should-you-renew