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With the updated version of the G20-era BMW plug-in hybrid petrol/electric 330e model, sold between 2022 and 2026, the conventional 320i variant's 184hp 2.0-litre petrol engine was matched with an electric motor and a larger battery to create quite a package. It was available with the estate body style and xDrive AWD too.
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History
Not everyone wanting futuristic engine technology wants their car to also look futuristic. If you're buying from this Bavarian brand and want a petrol/electric powerplant, between 2018 and 2026 the G20-era 330e Plug-in hybrid model offered a more subtle way to go. In 2022, the car was updated and it's that improved 'LCI' design we'll look at here.
You get a commuting level of all-electric driving range when the car's charged up, which enables the creation of some impressive overall efficiency stats - which fall only fractionally with the Touring estate body style. Take some time to understand BMW's thinking here and it's hard not to be impressed.
This G20-era design was the second Plug-in Hybrid 3 Series model we'd seen (the original one was launched back in 2013). The LCI update we're looking at here didn't include any changes to the PHEV drivetriain; these arrived as part of a further update in 2024, when a larger 19.5kWh battery delivered better EV range, plus an upgraded Operating System 8.5 set-up was installed in the cabin and chassis tuning tweaks introduced. This G20 LCI 330e model sold until late 2026 when the MK8 G50-era model was launched. The Touring estate versions of it continued until Spring 2027.
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What you get
This isn't the kind of Plug-in hybrid model you'll buy if you want to make an eco-statement. Unless you really know your BMWs, there's almost nothing to visually differentiate this G20 330e from any other 3 Series saloon of its era unless you happen to spot the side panel charging flap.
The LCI model update in 2022 brought a slightly different exterior look for the famous kidney-shaped front grille,, with lightly modified contours and added double bars. Further down the nose, the corner intakes were aggressively redesigned, a change more obvious with the sleeker bumper fitted to 'M Sport' variants. These intakes no longer incorporated fog lights, those now built into the slimmer LED headlamp units, which featured daytime running lights in an inverted L-shape.
The cabin looks predictably smart, with chrome finishing and high-gloss surfaces. The 'M Sport'-trimmed models get the full 'Live Cockpit Professional' package which gives you a 12.3-inch virtual instrument binnacle screen and a 10.25-inch centre-dash iDrive monitor that was increased to 14.9-inches in size as part of the LCI update.
There's a respectable amount of rear legroom for what remains a manageably-sized car. There's certainly more room to stretch out than was the case with the previous F30-generation 330e model, the distance between the front and rear seats extended by 11mm. There's slightly more headroom than that previous model too and BMW said that this cabin was wide enough to take three child seats side by side, though only the two outside positions come with Isofix attachment points.
And out back? Well the 330e saloon's luggage bay measures 375-litres - that's 105-litres down on a conventional four-door 3 Series model. The Touring estate 330e derivative has a 410-litre boot, extendable to 1,420-litres - which is 90-litres down on a conventionally-engined 3 Series Touring model.
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What to look for
This G20 3 Series was a more reliable proposition than earlier models. However, there are still issues to look for. We've heard of starter motor issues with moisture ingress or electrical/relay failures can cause over-heating or short circuits. There have also been reported problems with coolant and thermostst heat-management modules, which can develop slow leaks or electronic failures on higher-mileage models. B48 and B58 petrol engines can exhibit oil or coolant weeping from the oil filter housing. We've heard of high-voltage battery and charging glitches from this 330e PHEV; manifesting in occasional high-voltage battery cell monitoring problems, charging module quirks and 12V auxiliary battery drainage. On all models thoroughly check all the features on the central screen.
Obviously, a fully-stamped service history is vital. This car uses complex engines and only regular and appropriate maintenance will see them go the distance. Otherwise, it's just the usual things. Insist on a fully stamped-up service record and check the alloys for scratches and scuffs.
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Replacement parts
[based on a 2023 model 330e ex-vat] Parts prices for a G20 3 Series model from this period can be reasonable if you shop around. Looking at the 330e ('23-plate) as an example, we trawled around the internet and found these: An oil filter is in the £10-£28 bracket. An air filter is in the £21-£47 bracket. A set of front brake discs cost in the £133-£551 bracket; rear discs are in the £58-£483 bracket. A set of front brake pads is around £32-£179; rear pads are around £32-£143. A fuel filter is in the £11-£63 bracket; an alternator is around £1189-£369; wiper blades are around £14-£59.
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On the road
This G20 series 330e Plug-in hybrid took a big step forward over its F30 predecessor, the main difference between the two cars found when it comes to measurement of all-electric driving range, thanks to an increase in battery size from 7.6 to 12.0kWh. That capacity (applicable to 2022-2023-era G20/LCI-era 330e models) made a big difference. Whereas with the previous F30 generation 330e, the range was rated at only 21 miles, with early versions of this G20-series 330e design (and with early versions of the 2022 LCI updated model), BMW clamed up to 37.3 miles of zero emissions motoring from a fully-charged set of batteries. In other words, if you've a pretty typical daily commute, you might never have to fuel up this car to complete it.
As you might expect, this kind of cleverness came courtesy of a very advanced powerplant indeed, in this case a combination of the 184bhp 2.0-litre petrol unit from the 320i mated to an electric motor incorporating an 'XtraBoost' function. This can increase power to as much as 293hp, reducing the 62mph sprint time to six seconds exactly. The hybrid system's extra weight drops maximum speed slightly over that of the ordinary 320i, but it's still rated at 143mph. Plus you'll want to know that the brand's xDrive 4WD system was also available on this variant.
Let's cover off the things you'll need to get used to in driving this PHEV 3 series model. There's automatic transmission of course (BMW's usual ZF 8-speed 'box with paddleshifters). The drive modes are a bit different though - 'Sport' is the only setting carried over from a conventionally-engined model. In normal motoring, the car will default to its preferred 'Hybrid' driving setting, in which the clever software automatically determines for you the optimum combination of combustion and electric drive.
Alternatively (if battery charge levels permit), you can select 'Electric' mode, which liberates a bit more punch from the AC motor, though things peter out a little above 50mph. Your other options are either 'Sport' mode or, better still, 'XtraBoost' mode (which is the only one in which all 293 braked horses can be released). This 330e was improved in 2024 with a new 19.5kWh high-voltage battery which increased EV range to 63 miles.
You'll want to be reassured that the handling purity of the conventional G20 3 Series hasn't been diluted by the slight extra weight of the PHEV powertrain. Broadly, it wasn't. Which was something helped by this MK7 3 Series model line's adoption of the aluminium-rich 'cluster architecture' platform used by the brand's larger models, a platform that was 25% stiffer than the previous F30 version's chassis. This was a major contributor to weight savings over that previous model of up to 55kgs.
From this optimum starting point, the G20 development team then added in a whole range of handling updates, with the most significant addition being the special so-called 'lift-related' dampers. These clever shock absorbers incorporate structures that provide extra damping at the extremes of wheel travel and were standard on all models, allowing quite a firm sporting set-up to be adopted, but also one able to deliver a fluent ride over tarmac imperfections. Thanks to that, this car's able to combine a set-up for Silverstone with something that works equally well on the North Circular.
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Overall
Here, BMW brought us a PHEV 3 Series model that made real world sense. The previous generation F30-era 330e struggled a little in this regard with its relatively restricted all-electric driving range. Fortunately though, technology had moved on by the time of this G20-era design's launch in 2018 - and moved on again with this 2022 update; the improved LCI-era 330e model that created demonstrated just how far.
If you were thinking of a high-spec diesel-engined version of this Bavarian contender from the 2022-2026 era, we think you really have to look at this 330e as a realistic alternative.
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