Fits 2019–2027 M340i (G20/G21)

M340i (G20/G21) ENGINE & PERFORMANCE

Shop all 106 parts
UK fittingR44 HQ, Wembley
Express deliveryUK & worldwide
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M340i (G20/G21) Engine Performance106 products

106 products
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Pipercross PP2020 performance air filter for BMW M340i, M440i, M240i & Z4 M40i (B58)
PipercrossPipercross Performance Air Filter for BMW M340i, M440i, M240i & Z4 M40i (B58) - PP2020
£41.99GBP
Genuine BMW OEM Concentrated Screenwash With Antifreeze Genuine BMW OEM Concentrated Screenwash With Antifreeze 500ml 83125B5ED71
Genuine BMWGenuine BMW OEM Concentrated Screenwash With Antifreeze
From £3.00GBP
Sold out
Genuine BMW Twin Power Turbo LL-22 FE++ 0W-12 Engine Oil 1 Litre (2023+ Gen3 B Series Engines with 48v Hybrid Tech) 83215B5C945
Genuine BMWGenuine BMW Twin Power Turbo LL-22 FE++ 0W-12 Engine Oil 1 Litre (2023+ Gen3 B Series Engines with 48v Hybrid Tech) 83215B5C945
£30.67GBP
MMX magnetic sump plug seal kit containing five replacement crush seals for BMW engines
MMXMMX BMW Magnetic Sump Plug Seal Kit For B58, N55 & More (Pack Of 5)
£10.07GBP
Motul 8100 ECO-CLEAN 0W-30 Engine Oil 1L Motul 8100 ECO-CLEAN 0W-30 Engine Oil 5L
MOTULMotul 8100 ECO-CLEAN 0W-30 Engine Oil
From £21.99GBP
Genuine BMW DTF 1 Transfer Box Oil 1L 83225A4F016
Genuine BMWGenuine BMW DTF 1 Transfer Box Oil 1L 83225A4F016
£46.42GBP

M340i (G20/G21) Engine Performance at a glance

Vehicle
2019–2027 BMW M340i (G20/G21)
Powertrain
3.0-litre B58TU turbocharged straight-six, 48V mild hybrid from 2020
Main parts
intakes & air filters
Brands
Genuine BMW, MMX, MOTUL, Pipercross
Fitting & delivery
Fitting at R44 HQ, Wembley · UK & worldwide delivery
Parts listed
106 parts for the M340i (G20/G21)

BMW M340i (G20/G21) engine tuning & performance parts

R44 Performance stocks 106 engine performance parts for the 2019–2027 BMW M340i (G20/G21). Parts include intakes & air filters, from brands including Genuine BMW, MMX, MOTUL, Pipercross.

Most builds follow the same order: an ECU tune first, then intake and cooling upgrades such as intakes, charge pipes and intercoolers to keep temperatures in check, then fuelling, turbo and internal upgrades for bigger power targets. Each step supports the next, so it pays to plan your build as a whole.

Results depend on the combination of parts and the tune that supports them, so speak to our team before you buy. We can recommend a proven setup for your M340i (G20/G21), fit it at R44 HQ in Wembley, and deliver across the UK and worldwide.

Written by the R44 Performance team, Wembley, London

M340i (G20/G21) Engine Performance FAQs

What engine performance parts are available for the M340i (G20/G21)?

R44 Performance lists 106 engine performance parts for the BMW M340i (G20/G21), including intakes & air filters. Brands include Genuine BMW, MMX, MOTUL, Pipercross, and every part is listed for the M340i (G20/G21) – check each product page for body style and model-year fitment.

What are the best first engine upgrades for the M340i (G20/G21)?

For most turbocharged cars, the best first upgrades are an ECU tune and an intake, followed by cooling upgrades such as a charge pipe and intercooler. Each supports the next, so decide on your goals first – our team can suggest a setup based on how you use your car.

Do I need a tune after fitting performance parts?

Bolt-on parts like intakes can usually be fitted on their own, but bigger changes – such as downpipes, larger intercoolers, fuel system or turbo upgrades – normally need a matching ECU tune to run safely and make full use of the hardware. Check each product page or ask our team.

Will performance upgrades affect my warranty or insurance?

Modifications can affect manufacturer warranty cover and must be declared to your insurer. If your M340i (G20/G21) is still under warranty, check with the manufacturer or dealer first, and speak to your insurer before fitting.

Can R44 Performance fit engine performance parts to my M340i (G20/G21)?

Yes. Our technicians fit engine performance parts at R44 HQ in Wembley, London – contact our team for a quote and availability. We also deliver across the UK and worldwide if you'd rather use your own fitter.