| Source | Target | | axial-flow pump, axial pump | pompa di flusso assiale |
| axis of revolution, axis of rotation, rotation axle, rotational axis | asse di rotazione |
| axle base, wheel base (WB) | base dell'asse |
| axle beam, axle casing, axle housing | vano dell'asse |
| axle bearing | cuscinetto dell'asse |
| axle capacity | capacità assiale |
| axle load, road mass | carico dell'asse |
| axle nut | dado dell'asse |
| axle pressure, axle weight | pressione dell'asse |
| axle tube, suspension tube | tubo dell'asse |
| axle, wheel axle | asse |
| axle-load shift, axle-load transfer, wheel-load shift | trasferimento del carico dell'asse |
| babbitt metal | metallo di babbitt |
| back axle, rear axle (RA) | asse posteriore |
| back clearance, piston-ring radial clearance | gioco radiale anello del pistone |
| back coupling, feed-back | accoppiamento di ritorno |
| back cushion, squab | imbottitura per schienale |
| back electromotive force (BEMF), counter-electromotive force (CEMF) | controforza elettromotrice |
| back light, rear light, tail light | fanale posteriore |
| back mirror, interior mirror, rear mirror, rearview mirror | specchietto interno |
| back muffler, back silencer, rear muffler, rear silencer | silenziatore posteriore |
| back nut, check nut, counter nut, lock nut, setting nut | dado posteriore |
| back off, unscrew | svitare |
| back panel, rear panel, rear wall | pannello posteriore |
| back plate, clutch cover | copertura della frizione |
| back rest, seat back, squab | schienale |
| back seat, rear bench, rear seat | sedile posteriore |
| back side, rear end, rear side | lato posteriore |
| back spoiler, rear spoiler | spoiler posteriore |
| back squab, lumbar support | supporto lombare |
| back stroke, descending stroke | corsa discendente |
| back tire, back tyre, rear tire, rear tyre | pneumatico posteriore |
| back up, drive rearward, reverse | procedere in retromarcia |
| back wheel, rear wheel | ruota posteriore |
| back window, rear window | finestrino posteriore |
| backbone chassis, backbone frame, central-tube chassis, central-tube frame | telaio con tubo centrale |
| back-firing, back-kick, popping-back | scoppio nel tubo di scappamento |
| backing light, back-up light, reverse light, reversing light | fanale retromarcia |
| backing plate | placca di supporto |
| back-lash compensation, compensation of play | compensazione del gioco |
| back-pressure valve, check valve, orifice valve, non-return valve | valvola di non ritorno |
| back-rest adjuster, seat-back adjuster | regolatore dello schienale |
| back-up system | sistema ausiliario |
| back-up washer | rondella di supporto |
| back-wheel bearing, rear-wheel bearing | cuscinetto ruota posteriore |
| back-window defroster | sbrinatore lunotto |
| back-window shelf, rear shelf, window shelf | ripiano lunotto |
| back-window washer | lavavetro lunotto |
| back-window wiper | tergilunotto |
| baffle plate | deflettore |
| baffle plate, deflector plate, splash baffle | piastra del deflettore |
| baggage compartment, baggage space, boot, luggage compartment, luggage space | vano bagagli |
| baggage compartment, boot, luggage compartment, baggage space, luggage space | compartimento bagagli |
| baggage net, luggage net | rete per bagagli |
| baggage rack, boot-lid rack, luggage rack, parcel restraint, trunk-lid rack | reticella portabagagli |
| baggage trailer, luggage trailer | rimorchio a bagagli |
| baggage, luggage | bagaglio |
| baggage-compartment lighting, boot lighting, luggage-compartment lighting | illuminazione vano bagagli |
| balance | bilanciare |
| balance bore | alesaggio equilibrato |
