Mercedes A45 AMG 177 Performance Parts & Tuning Mods

Top Brands For Mercedes A45 AMG 177

For the Mercedes A45 AMG 177, you are spoilt for choice when it comes to tuning brands. Below is a selection of leading manufacturers offering proven performance parts, styling upgrades and motorsport-grade components to help you get the most from this hot hatch.

Exterior Styling Mods for Mercedes A45 AMG 177

You can sharpen the presence of your Mercedes A45 AMG 177 with a range of exterior styling mods, from subtle splitters and diffusers to full body kits, rear spoilers, custom grilles and other visual upgrades that help your hot hatch look more unique, aggressive and track inspired.

Suspension & Handling Upgrades

The Mercedes A45 AMG 177 is sharp out of the box, but it can feel a bit firm and understeery when you really push on. Start with quality tyres, going for a performance road or track-focused compound to boost grip and braking confidence straight away. Match that with uprated brake pads, braided lines and fresh high-temp fluid for stronger pedal feel and more consistent stopping on fast road or track days, then consider a big brake kit if you are running serious power or regular circuit work. Next, look at suspension tuning. Lowering springs or a well matched coilover kit will trim the ride height, reduce roll and make turn in feel more direct without ruining daily usability. Uprated dampers help the chassis stay composed over bumps, while thicker anti roll bars, a front strut brace and stronger bushes improve stability and agility, cutting down on factory body roll and front end push so the A45 feels more playful and precise in the corners.

Frequently Asked Questions

What are the best first performance mods for a Mercedes A45 AMG 177?

If you are just starting out with tuning your A45 AMG 177, a good first step is a quality panel filter or intake kit plus a high flowing turbo inlet. These simple breathing upgrades help the 2.0 turbo engine spool a bit sharper and make the most of a stock map.

Next up, many owners go for a cat back exhaust system. It reduces back pressure slightly, sounds far better than stock, and sets you up nicely for a future remap or ECU tune without pushing the hardware too hard.

Pair those mods with decent tyres and possibly upgraded brake pads, and you will have a sharper, more responsive A45 without sacrificing day to day reliability.

How much power can I gain from a remap on my A45 AMG 177?

A well written ECU remap on a healthy, stock Mercedes A45 AMG 177 can deliver a noticeable bump in horsepower and torque, along with improved throttle response. You can typically expect a solid gain across the rev range, rather than just a peak number for bragging rights.

With supporting mods like an uprated intake, downpipe with sports cat, and intercooler, the engine can run a bit more boost and keep intake temps under control. This usually gives stronger mid range punch and more consistent performance on back to back pulls or track sessions.

Figures will always vary depending on fuel quality, condition of the car and the specific tune, so think in terms of a healthy improvement and better drivability, not miracle power jumps.

Will tuning my Mercedes A45 AMG 177 affect reliability?

Light performance upgrades and a sensible remap, carried out by a reputable tuner, are generally well tolerated by the A45 AMG 177 platform. The M133 engine is strong, but like any turbocharged unit it does not enjoy abuse or poor maintenance.

Stick to regular oil changes, use the correct spec oil, keep an eye on spark plugs, and make sure your cooling system is in good shape. Supporting mods such as an upgraded intercooler and high quality fluids help the car cope with extra heat and stress from added boost.

Issues usually come from aggressive maps, low quality parts, or neglect. If you treat the car sensibly, warm it up properly and avoid endless high boost runs on a cold engine, reliability should remain good.

What supporting mods do I need before going for a Stage 2 tune?

For a typical Stage 2 setup on a Mercedes A45 AMG 177, most tuners will recommend a less restrictive downpipe with a high flow sports cat, a cat back exhaust, and an uprated intercooler. These upgrades help the turbo breathe and keep charge temps under control when boost is raised.

An intake or performance air filter plus turbo inlet elbow are also common, as they reduce restriction on the compressor side. Many owners also fit uprated spark plugs one or two heat ranges colder to cope with the extra load.

Finally, make sure the car is mechanically sound first. Fresh plugs, good coils, and no existing faults are essential before pushing for more power with an ECU remap.

What wheel and tyre fitment works well on the A45 AMG 177?

The stock A45 usually runs 18 or 19 inch alloys, but many owners switch to lightweight performance wheels to reduce unsprung weight and improve handling. A popular setup is a quality 18 inch rim, often 8 or 8.5J wide, paired with a performance tyre in a sensible width for fast road and track use.

Offset and tyre size matter to avoid rubbing on the arch liners, especially on lowered cars. Going too aggressive with wide rims and stretched rubber might look good on social media, but it can hurt traction and ride quality.

If you are unsure, get in touch with your exact suspension setup and we can advise rim width, offset and tyre combo that fits the A45 AMG 177 nicely without causing clearance issues.

Do I need to upgrade the brakes when increasing power?

The factory AMG brakes on the Mercedes A45 177 are decent, but once you add power and start driving harder, the weak point is usually heat management. You may notice brake fade on spirited drives or track days.

Before jumping straight to big brake kits, consider performance brake pads, high temperature brake fluid, and grooved or drilled discs. This kind of brake upgrade improves bite and consistency without breaking the bank.

If you are running sticky track tyres and doing regular circuit work, then a full big brake kit with larger calipers and discs for the front axle makes sense, along with quality pads matched to your driving style.

How much does it typically cost to tune a Mercedes A45 AMG 177?

The cost of tuning your A45 depends on how far you want to go. A basic ECU remap alone is usually the most cost effective way to unlock extra performance, and pricing sits well below the cost of full hardware packages.

Once you start adding a turbo back exhaust, intercooler, intake and potentially upgraded fueling components, the bill naturally climbs. It is often best to plan a staged approach, for example intake and exhaust first, then an intercooler, then a Stage 2 remap once all the hardware is in place.

If you let us know your budget and goals, whether that is fast road, track days or daily driving with a bit more punch, we can suggest a tuning package for your Mercedes A45 AMG 177 that offers good value without cutting corners on quality.

Final Thoughts On The Mercedes A45 AMG 177

The Mercedes A45 AMG 177 is a seriously capable hot hatch straight out of the box, with strong turbo power, sharp chassis and all wheel drive traction that makes it feel very special on UK roads. Its main weak spots are typical of a highly stressed turbo engine and compact platform, things like heat management, slightly busy factory damping and brakes that can fade when driven hard on track. That is exactly where carefully chosen performance parts come in, letting you enjoy the car’s character without fighting its quirks. With the right mix of engine mods, from a decent intercooler and intake to a quality turbo-back exhaust and sensible remap, the A45 responds with noticeable gains and much more consistent performance. Cooling upgrades help keep inlet temps in check on spirited drives, while a good service regime and proper fluids look after reliability. Many owners also add uprated ignition and stronger hardware as power climbs, keeping the EA113-derived unit happy without turning it into a hand grenade. On the chassis side, a set of matched lowering springs or coilovers, plus uprated anti-roll bars and alignment tweaks, tidy up the handling and dial out some of the stock understeer. Better pads, discs and braided lines massively improve braking confidence, especially once you are carrying more speed. Add a set of lightweight alloys with quality tyres and the whole car feels more planted, more precise and easier to lean on. Styling tweaks like splitters, diffusers, spoilers and subtle carbon trim let you give your A45 AMG 177 its own personality while backing up the performance feel. Build it with a clear plan, balance your power upgrades with handling and stopping power, and you end up with a fast road or occasional track toy that still works as a daily. Treated right, the A45 becomes a genuinely rewarding all rounder, so the fun part now is deciding how you want to personalise your own build.