Headlining changes include the addition of a bright new Sunset Orange metallic exterior paint, along with updated alloy wheel designs and the standard fitment of BMW's iDrive 6 infotainment system across the range.
Starting at $57,300 before on-road costs for the entry-level 318i, the 3 Series range kicks off $800 dearer than before, with the wider range up in price by around $1000 to $2000 depending on variant.
Features include the Sport Line styling package as standard, with a new 18-inch double-spoke light alloy wheel with Jet Black accents now available as a no-cost option.
The 318i, 320i, 330i and 330e all get the Sport Line pack included, while the range-topping 340i comes with either the Luxury Line or M Sport packages at no extra cost. Buyers of the 330i and 330e can also opt for the Luxury Line free of charge.
M Sport package buyers also have the choice of a new cost-option 19-inch bi-colour alloy wheel finished with Orbit Grey as the prominent colour.
The flagship 340i, meanwhile, gets fixed-ratio power steering in line with the rest of the range based on customer feedback. Customers who still want the Variable Sports Steering that was previously equipped to the 340i can add the system as an option.
In the 318i, 320i and 320d, the software is integrated into the 6.5-inch Navigation System Business central display, while higher-spec models get a larger 8.8-inch Navigation Professional colour touchscreen.
There's also the option of the multi-function digital driver's display across the range, which adapts the interface according to the selected driver mode.
Updated trim choices for the interior are now available, too, including a double-stitched instrument panel, a new Cognac colour for the Dakota leather upholstery, along with a dark aluminium carbon insert with pearl chrome highlights which is available equipped with the M Sport package.
Other options include the Innovations Package, which is available across the range and brings tailored equipment depending on the variant.
For the 318i, the pack adds Navigation System Professional, parking assistant, extended smartphone connectivity and the multi-function digital driver's display.
The 320i and 320d Innovations Package extends that further with adaptive cruise control with Stop & Go function.
For the 330i, additional equipment includes all the above equipment minus Navigation System Professional, as it already gets the upgraded display as standard. Meanwhile the 330e swaps out the multi-function display for a specific instrument set that integrates with its plug-in hybrid (PHEV) system.
The updated BMW 3 Series range is available to order now, with first deliveries arriving in November.
2018 BMW 3 Series pricing
318i - $57,300 (+$800)
320i - $63,400 (+$900)
320d - $65,800 (+$900)
330i - $70,900 ($1000)
330e iPerformance - $73,900 (+$1000)
340i - $91,200 (+$1300)
320i - $67,500 (+$2000)
330i - $75,000 (+$1100)
All prices listed exclude on-road costs