| German | Img | English |
| machen | | make |
| mageres Gemisch | | lean gas mixture |
| Magnetgenerator | | magdyno |
| magnetisch | | magnetic |
| Magnetpulverkupplung | | magnetic powder clutch |
| Magnetventil | | electrical solenoid valve |
| Magnet-Zündung | | magneto ignition |
| Manschette | | bellows; gaiter |
| Mantel | | jacket |
| manuell | | manual |
| Marke | | make; marque |
| markiert | | marked |
| Markierung | | mark |
| Markierung auf der Schwungscheibe | | flywheel marking |
| Maschine | | machine |
| Maß | | measure |
| Maß | | size |
| Masse | | earth; ground; mass |
| Masse - Elektrode | | earth electrode |
| Masseband | | earth connection; earth strap; ground strap |
| Maßeinheit | | measure |
| Massekabel | | earth connection; earth strap |
| Massepol | | earth terminal |
| massiv | | solid |
| Materialzugabe | | allowance |
| matt | | dull |
| Mechaniker | | fitter |
| mechanische Bremse | | mechanical brake |
| Mehrlochdüse | | multihole nozzle |
| mehrphasig | | polyphase |
| Mehrscheibenkupplung | | multi-disc clutch; multiple-disc clutch |
| Mehrzahl | | mass |
| Meißel | | cold chisel; chisel |
| meißelähnliches Werkzeug | | chisel-nosed tool |
| Membran | | diaphragm; membrane |
| Membranbeschleunigerpumpe | | diaphragm accelerator pump |
| Membrandeckel | | diaphragm cover |
| Membraneinheit | | diaphragm unit |
| Membranventil | | reed valve |
| Meßbehälter | | calibrated container |
| Messer | | knife |
| Meßgerät | | gauge |
| Meßgeräte - Zeiger | | meter hand |
| Meßschieber mit Noniuseinteilung | | vernier caliper |
| Meßuhr | | dial gauge; dial test indicator |
| Meßwerkzeug | | meter |
| Metall-Oxid-Halbleiter-Feldeffekttransistor | | Metal-oxide semiconductor field effect transistor (MOSFET) |
| Metallsäge | | hacksaw |
| Metallschlauch | | metal hose |
| Metallspäne | | metal filings |
| Methanol | | alcohol-based fuels |
| metrisches Gewinde | | metric thred |
| metrisches System | | metric system |
| Minimalspiel | | minimum clearance |
| Minimalwert | | minimum value |
| Minus an Masse | | negative earth |
| Minuskabel | | negative lead |
| Minuspol | | negative pole |
| Mischkammer | | mixing chamber |
| Mischrohr | | emulsion tube; venture |
| miteinander verbinden | | interconnect |
| Mitnehmer | | yoke |
| Mitte | | centre |
| Mittelkonsole | | central console |
| Mittellinie | | centre line |
| Mittelpunkt | | centre; median |
| Mittelständer | | centre stand |
| Mittelstellung | | neutral |
| Mittelwelle | | Medium wave (MW) |
| Mittelwert | | mean value |
| Mittenabstand | | centre distance |
| Mittig hoch angebrachte Bremsleuchte | | Centrally high mounted stop lamp (CHMSL) |
| Modell mit Saugmotor | | non-turbo model |
| Modul zur Feststellung der Teilnehmeridentität | | Subscriber identity module (SIM) |
| Modulares Motormanagementsystem | | Modular engine management system (MEMS) |
| Molybdändisulfid | | molybdenum disulphide |
| montieren | | mount |
| Motor | | engine |
| Motor der K-Serie in 'V' Konfiguration mit 6 Zylindern | | K serie engine 'V' configuration 6 cylinder (KV6) |
| Motoraufhängung | | engine mounting |
| Motorblock | | cylinder block; engine block |
| Motordrehmoment | | engine torque |
| Motordrehzahl | | engine speed |
| Motoreinstellung | | engine timing |
| Motorhaube | | bonnet lid; bonnet; hood |
| Motorkettenrad | | engine sprocket |
| Motorlager | | engine bracket |
| Motormanagementsystem | | Engine management system (EMS) |
| Motoröl-Meßstab | | engine oil level |
| Motorraum | | bonnet; engine bay |
| Motorraumleuchte | | bonnet lamp |
| Motorschild | | engine plate |
| Motorsteuerungsmodul | | Engine control module (ECM) |
| Muffe | | ferrule; sleeve |
| Muffenventil | | sleeve valve |
| Multifunktionsanzeige | | multi-function indicator |
| Multifunktionslogik | | Multi-function logic (MFL) |
| Muster | | sample |