The biggest change is the introduction of a new entry-level model, the BMW Z4 sDrive18i, which is powered by a 2.0-litre turbo petrol engine that develops 154bhp.
It comes with a six-speed manual gearbox as standard, or an eight-speed auto gearbox can be ordered as an option.
The manual sDrive18i can complete the 0-62mph sprint in 7.9 seconds and hit a top speed of 137mph. The claimed average fuel economy is 41.5mpg and CO2 emissions are 159g/km.
Aside from the new engine, there are some minor tweaks to the Z4’s exterior, including revised LED headlights and a choice of new 17 and 18-inch alloy wheel designs.
Inside, BMW has added the option of the Design Pure Traction styling pack, which adds black and orange contrasting trim to the interior. The Z4 also gets the option of the impressive internet-connected Professional navigation system.
Aside from the new sDrive18i model, the remaining Z4 sDrive20i, sDrive28i, sDrive35i and sDrive35is (pictured) spec levels continue unchanged. The revised Z4 will go on sale in the UK in April.