BMW M5 G90 Performance Parts & Tuning Mods

Top Brands For BMW M5 G90 Mods

The BMW M5 G90 is well supported by a wide range of leading performance brands, covering everything from engine tuning and exhaust upgrades to wheels, suspension kits and braking hardware. Explore trusted manufacturers below to find proven aftermarket parts for your build.

Exterior Styling Mods for BMW M5 G90

The BMW M5 G90 already looks serious, but a few exterior styling mods can really sharpen its presence. From aggressive body kits, splitters, diffusers and spoilers to custom grilles and trim upgrades, you can dial in a more unique, motorsport inspired look that matches the car’s performance.

Handling, Suspension & Chassis Upgrades

The G90 BMW M5 is a serious weapon out of the box, but its weight and comfort-focused factory set-up mean it can feel a bit soft and safe on the limit, with a touch of understeer when pushed. Starting with premium performance tyres transforms front-end bite and overall grip, especially in the wet. Match that with uprated brake pads, braided lines and high-temp fluid, or a full big brake kit if you are doing regular track days, for much stronger, more consistent stopping power and confidence on repeated hard use. Once tyres and brakes are sorted, suspension tuning really wakes the chassis up. Quality lowering springs or coilovers reduce roll and tighten the stance, while adjustable dampers let you dial in a sharper, more agile feel without ruining daily comfort. Stiffer anti-roll bars, uprated bushings and strut braces further improve stability and turn-in, making the M5 feel more precise, planted and fun in fast corners without promising race car levels of grip.

Frequently Asked Questions

What are the best first performance mods for a BMW M5 G90?

The usual starting point on a BMW M5 G90 is a high quality intake system, freer flowing exhaust and an ECU remap that is written specifically for the hybrid twin turbo V8. Together, these upgrades can unlock noticeable gains in horsepower and torque without making the car unpleasant to live with.

We also recommend looking at uprated brake pads and fluid early on, along with a mild suspension upgrade such as performance springs or coilovers. These handling mods help you actually use the extra power, and keep the big M5 feeling sharp on fast road and occasional track days.

Is ECU tuning or a remap safe for the G90 M5 hybrid system?

A well developed ECU tune for the BMW M5 G90 can be very safe, as long as it is written to respect the limits of the turbochargers, fuel system and the hybrid drivetrain. The key is using maps that have been tested on this exact platform, not generic files.

Going sensible on boost targets, keeping air fuel ratios in check and monitoring exhaust gas temperatures will help reliability. Supporting mods like upgraded intercoolers and improved cooling are strongly recommended if you plan to run higher power levels or do regular track work.

How much power can I realistically gain from bolt on upgrades and a remap?

With basic bolt ons on the BMW M5 G90, for example performance intake, downpipes, cat back exhaust and a quality ECU remap, you can expect a healthy bump in both horsepower and torque over stock. The exact figures will depend on fuel quality, dyno type and how aggressive the tune is.

We always suggest focusing less on chasing a specific number and more on getting a setup that delivers strong, consistent performance without stressing the engine and hybrid components. A smooth, reliable power curve is worth far more on the road than a spiky dyno graph.

Will tuning and mods affect the reliability and warranty of my M5 G90?

Any performance tuning, including remaps and hardware upgrades, has the potential to affect the BMW warranty on your M5 G90. Dealers can see changes in software and major hardware mods, so you should assume that related claims could be questioned.

In terms of reliability, sensible upgrades with proper mapping, good fuel and regular maintenance are usually well tolerated. Avoid cheap parts, over-ambitious boost levels and poor quality tunes, and keep on top of oil changes, spark plugs and cooling system checks, especially if you drive hard.

What wheel and tyre sizes work best on a tuned BMW M5 G90?

The factory wheel and tyre setup on the BMW M5 G90 is already quite aggressive, but many owners move to wider rims and performance tyres to improve traction. Sticking close to OEM rolling radius keeps the xDrive system and electronics happy.

Popular upgrades include lightweight forged alloys in similar diameters with a slightly wider width and a quality UHP tyre. If you plan to track the car, a square setup with equal widths front and rear can help balance, but it may require careful offset choice and possibly minor suspension tweaks.

Do I need supporting mods like cooling or upgraded brakes when increasing power?

Once you go beyond a mild tune and basic bolt ons on your M5 G90, supporting mods become very important. The combination of turbo power and hybrid assistance can generate a lot of heat during spirited driving.

Uprated intercoolers, improved engine cooling and high performance brake pads, discs and fluid help keep everything under control. These upgrades do not show big dyno gains, but they make a huge difference to consistency and confidence on road and track.

Is a full exhaust system worth it on the BMW M5 G90?

A quality performance exhaust on the BMW M5 G90 improves sound and can help reduce back pressure, especially if combined with high flow downpipes where emissions rules allow. You will usually see small but noticeable gains when paired with a suitable ECU tune.

Cat back systems are a good compromise for many owners, giving better tone and reduced weight without heavily impacting emissions hardware. For more serious builds, a full turbo back setup with appropriate mapping and, where required, additional emissions solutions can release more potential, but must be chosen carefully to stay road legal in the UK.

Final Thoughts on the BMW M5 G90

The BMW M5 G90 is a seriously capable bit of kit straight out of the box, blending big power, all‑weather traction and luxury in a way few cars can match. It is a heavy saloon though, and you can feel that when you really start to push on, especially on tight B‑roads or repeated hot laps. That is where well chosen performance parts and tuning packages come into their own, sharpening the response and letting the engine and chassis show what they are really capable of. With sensible software upgrades, intake and exhaust mods and improved cooling, you get stronger, more consistent performance without abusing the drivetrain. From a handling point of view, the stock suspension and bushings on the G90 are tuned for comfort as much as outright control, which can mean a little roll and softness when you are properly committed. Uprated coilovers or sport springs, matched with quality dampers, transform the car’s balance and confidence without ruining daily drivability. Stiffer anti‑roll bars, fresh alignment settings and lightweight wheels or alloys help the M5 change direction faster and feel more alive on the road. Add in serious brake upgrades, from performance pads and fluid to full big brake kits, and the car becomes much happier with repeated hard stops on fast road runs or track days. Styling wise, the G90 already has presence, but subtle aero tweaks, carbon splitters, diffusers and rear spoilers give it that motorsport flavour while also helping stability at speed. Many owners also address the slightly muted factory soundtrack with a sport exhaust, which adds character without necessarily going over the top. Inside and out, small details like bucket‑style seats, short shifters and motorsport‑inspired trim make the car feel more focused every time you get behind the wheel. Put together the right mix of power upgrades, chassis tuning and styling mods, and the BMW M5 G90 turns from a rapid executive saloon into a properly sorted all‑round performance car. You can keep reliability and everyday comfort intact by using proven, high quality aftermarket parts and following a realistic tuning plan rather than chasing headline numbers. The end result is a package that pulls harder, turns in sharper and looks exactly how you want it to, without losing that daily usability that makes the M5 special. It is all about building the car around your driving style, so use the G90’s solid foundations and make it your own.