Is your car mod legal?
Straight answers on what is road-legal, grounded in the actual regulations, for the UK, US and Germany. Pick a modification for the verdict, the conditions that decide it, and the legal alternatives.
Prefer a deeper read? Browse the articles and per-car fitment guides.
United Kingdom 94 guides
- Are 4D Number Plates legal in the UK?
- Is a Big Brake Kit legal in the UK?
- Is a Bike Rack legal in the UK?
- Is a Blow-Off Valve legal in the UK?
- Is a Body Kit or Wide Arches legal in the UK?
- Is a Camber Kit legal in the UK?
- Is a Cold Air Intake legal in the UK?
- Is a Decat legal in the UK?
- Is a DPF Delete legal in the UK?
- Is a Flame Thrower Exhaust Kit legal in the UK?
- Is a Front Splitter legal in the UK?
- Is a Hydraulic Handbrake legal in the UK?
- Is a Laser Jammer legal in the UK?
- Is a Manual Gearbox Conversion legal in the UK?
- Is a Nitrous Oxide System legal in the UK?
- Is a Pops and Bangs Map legal in the UK?
- Is a Quick-Release Steering Boss legal in the UK?
- Is a Racing Harness legal in the UK?
- Is a Radar Detector legal in the UK?
- Is a Rear Wing or Spoiler legal in the UK?
- Is a Resonator Delete legal in the UK?
- Is a Respray or Colour Change legal in the UK?
- Is a Roll Cage legal in the UK?
- Is a Roof Rack or Roof Box legal in the UK?
- Is a Roof Tent legal in the UK?
- Is a Short Shifter legal in the UK?
- Is a Snorkel legal in the UK?
- Is a Sports Cat legal in the UK?
- Is a Straight-Pipe Exhaust legal in the UK?
- Is a Sunstrip legal in the UK?
- Is a Supercharger Conversion legal in the UK?
- Is a Suspension Lift Kit legal in the UK?
- Is a Tinted Plate Cover legal in the UK?
- Is a Tow Bar legal in the UK?
- Is a Turbo or Supercharger Upgrade legal in the UK?
- Is a Vinyl Wrap legal in the UK?
- Is a Windscreen-Mounted Dashcam legal in the UK?
- Is a Wing Mirror Delete legal in the UK?
- Is A-Frame Towing legal in the UK?
- Are Aftermarket Wheels legal in the UK?
- Is Air Suspension legal in the UK?
- Is an AdBlue Delete legal in the UK?
- Is an Aftermarket Steering Wheel legal in the UK?
- Is an Air Horn legal in the UK?
- Is an Android Head Unit legal in the UK?
- Is an E85 Conversion legal in the UK?
- Is an EGR Delete legal in the UK?
- Is an Engine Swap legal in the UK?
- Is an EV Conversion legal in the UK?
- Is an Exhaust Cutout legal in the UK?
- Is an HID Conversion Kit legal in the UK?
- Is an LED Light Bar legal in the UK?
- Is an LPG Conversion legal in the UK?
- Is an Oil Catch Can legal in the UK?
- Are Angel-Eye Headlights legal in the UK?
- Are Arch Extensions legal in the UK?
- Are Bigger Wheels legal in the UK?
- Are Braided Brake Lines legal in the UK?
- Are Bucket Seats legal in the UK?
- Are Bull Bars legal in the UK?
- Is Cat-Back Exhaust legal in the UK?
- Are Coilovers legal in the UK?
- Are Crystal Indicators legal in the UK?
- Are Daytime Running Lights legal in the UK?
- Is Debadging legal in the UK?
- Is Downpipe legal in the UK?
- Are Drilled and Slotted Brake Discs legal in the UK?
- Is ECU Remap legal in the UK?
- Are Exhaust Tips legal in the UK?
- Are Flashing Strobe Lights legal in the UK?
- Is Hydraulic Suspension legal in the UK?
- Are Interior Lighting legal in the UK?
- Are LED Headlight Bulbs legal in the UK?
- Are LED Number Plate Lights legal in the UK?
- Are Lowering Springs legal in the UK?
- Are Mud Flaps legal in the UK?
- Is Number Plate Blocker Spray legal in the UK?
- Are Performance Camshafts legal in the UK?
- Is Private Plate Spacing legal in the UK?
- Are Puddle Lights legal in the UK?
- Are Rock Sliders legal in the UK?
- Are Sequential Indicators legal in the UK?
- Are Show Number Plates legal in the UK?
- Are Smoked Rear Lights legal in the UK?
- Are Snow Socks legal in the UK?
- Are Spotlights legal in the UK?
- Are Stretched Tyres legal in the UK?
- Are Studded Tyres legal in the UK?
- Is Tinted Headlight Film legal in the UK?
- Are Towing Mirrors legal in the UK?
- Is Underglow Neon Lighting legal in the UK?
- Is Water-Methanol Injection legal in the UK?
- Are Wheel Spacers legal in the UK?
- Is Window Tint legal in the UK?
United States 81 guides
- Is a Big Brake Kit legal in the US?
- Is a Blow-Off Valve legal in the US?
- Is a Body Kit or Wide Arches legal in the US?
- Is a Camber Kit legal in the US?
- Is a Cat-Back Exhaust legal in the US?
- Is a Cold Air Intake legal in the US?
- Is a Dashcam legal in the US?
- Is a Decat legal in the US?
- Is a DEF/AdBlue Delete legal in the US?
- Is a Downpipe legal in the US?
- Is a DPF Delete legal in the US?
- Is a Flame Thrower Exhaust Kit legal in the US?
- Is a Front Splitter legal in the US?
- Is a Hydraulic Handbrake legal in the US?
- Is a Laser Jammer legal in the US?
- Is a Manual Gearbox Conversion legal in the US?
- Is a Pops and Bangs Map legal in the US?
- Is a Quick-Release Steering Boss legal in the US?
- Is a Racing Harness legal in the US?
- Is a Radar Detector legal in the US?
- Is a Rear Wing or Spoiler legal in the US?
- Is a Resonator Delete legal in the US?
- Is a Respray legal in the US?
- Is a Roll Cage legal in the US?
- Is a Short Shifter legal in the US?
- Is a Sports Cat legal in the US?
- Is a Straight Pipe Exhaust legal in the US?
- Is a Sunstrip legal in the US?
- Is a Supercharger Conversion legal in the US?
- Is a Suspension Lift Kit legal in the US?
- Is a Tinted Plate Cover legal in the US?
- Is a Turbo Upgrade legal in the US?
- Are Aftermarket Wheels legal in the US?
- Is Air Suspension legal in the US?
- Is an Aftermarket Steering Wheel legal in the US?
- Is an Air Horn legal in the US?
- Is an Android Head Unit legal in the US?
- Is an E85 Conversion legal in the US?
- Is an ECU Remap legal in the US?
- Is an EGR Delete legal in the US?
- Is an Engine Swap legal in the US?
- Is an EV Conversion legal in the US?
- Is an Exhaust Cutout legal in the US?
- Is an HID Conversion Kit legal in the US?
- Is an LED Light Bar legal in the US?
- Is an LPG Conversion legal in the US?
- Is an Oil Catch Can legal in the US?
- Are Angel-Eye Headlights legal in the US?
- Are Arch Extensions legal in the US?
- Are Bigger Wheels legal in the US?
- Are Braided Brake Lines legal in the US?
- Are Bucket Seats legal in the US?
- Are Bull Bars legal in the US?
- Are Coilovers legal in the US?
- Are Crystal Indicators legal in the US?
- Are Daytime Running Lights legal in the US?
- Is Debadging legal in the US?
- Are Drilled and Slotted Brake Discs legal in the US?
- Are Exhaust Tips legal in the US?
- Are Flashing Strobe Lights legal in the US?
- Is Hydraulic Suspension legal in the US?
- Are Interior Lighting legal in the US?
- Are LED Headlight Bulbs legal in the US?
- Are LED Number Plate Lights legal in the US?
- Are Lowering Springs legal in the US?
- Are Mud Flaps legal in the US?
- Is Nitrous Oxide legal in the US?
- Is Number Plate Blocker Spray legal in the US?
- Are Performance Camshafts legal in the US?
- Are Sequential Indicators legal in the US?
- Are Smoked Rear Lights legal in the US?
- Are Snow Socks legal in the US?
- Are Spotlights legal in the US?
- Are Stretched Tyres legal in the US?
- Are Studded Tyres legal in the US?
- Is Tinted Headlight Film legal in the US?
- Are Towing Mirrors legal in the US?
- Is Underglow Neon legal in the US?
- Is Water-Methanol Injection legal in the US?
- Are Wheel Spacers legal in the US?
- Is Window Tint legal in the US?
Deutschland 36 guides
- Sind Alufelgen in Deutschland legal?
- Ist Autogas in Deutschland legal?
- Ist Chiptuning in Deutschland legal?
- Sind dunkle Rückleuchten in Deutschland legal?
- Ist ein Big-Brake-Kit in Deutschland legal?
- Ist ein DPF-Ausbau in Deutschland legal?
- Ist ein Gewindefahrwerk in Deutschland legal?
- Ist ein Kat-Ausbau (Decat) in Deutschland legal?
- Ist ein Klappenauspuff in Deutschland legal?
- Ist ein Luftfahrwerk in Deutschland legal?
- Ist ein Motorumbau in Deutschland legal?
- Ist ein Radarwarner in Deutschland legal?
- Ist ein Sportauspuff in Deutschland legal?
- Ist ein Sportlenkrad in Deutschland legal?
- Ist ein Sportluftfilter in Deutschland legal?
- Ist ein Turbo-Umbau in Deutschland legal?
- Ist ein Überrollkäfig in Deutschland legal?
- Ist eine AdBlue-Entfernung in Deutschland legal?
- Ist eine AGR-Entfernung in Deutschland legal?
- Ist eine Dashcam in Deutschland legal?
- Ist eine Folierung in Deutschland legal?
- Ist eine Höherlegung in Deutschland legal?
- Ist eine Lachgaseinspritzung in Deutschland legal?
- Ist eine Spurverbreiterung in Deutschland legal?
- Ist eine Umlackierung in Deutschland legal?
- Ist eine Xenon-Nachrüstung in Deutschland legal?
- Sind Hosenträgergurte in Deutschland legal?
- Sind LED-Nachrüstlampen in Deutschland legal?
- Sind Pops and Bangs in Deutschland legal?
- Ist Scheibentönung in Deutschland legal?
- Sind Spikereifen in Deutschland legal?
- Sind Sportschalensitze in Deutschland legal?
- Ist Tagfahrlicht in Deutschland legal?
- Sind Tieferlegungsfedern in Deutschland legal?
- Ist Unterbodenbeleuchtung in Deutschland legal?
- Sind Zusatzscheinwerfer in Deutschland legal?