Here is a table of the consonant sounds of Najdi Arabic. The phonemes /p/ ⟨پ⟩ and /v/ ⟨ڤ⟩ (not used by all speakers) are not considered to be part of the phonemic inventory, as they exist only in foreign words and can be pronounced as /b/ and /f/ respectively depending on the speaker.
The classicized [q] is an allophone for /g/ ⟨ق⟩ in few words and proper names as in القرآن [alqur'ʔaːn] ('Quran') and قانون [qaːnuːn] ('Law').
The distinction between the classical /dˤ/ ⟨ض⟩ and /ðˤ/ ⟨ظ⟩ was completely lost in Najdi Arabic, and both are realised as /ðˤ/.
the marginal phoneme /ɫ/ only occurs in the word الله /aɫːaːh/ ('god') and words derived from it, it contrasts with /l/ in والله /waɫːa/ ('i swear') vs. ولَّا /walːa/ ('or'), but it occurs as an allophone of /l/ in many other contexts, especially when neighboring the phonemes /g, x, sˤ, tˤ/ e.g. قَلَم "pencile" /galam/→[gaɫam].
The phonemes /ɣ/ ⟨غ⟩ and /x/ ⟨خ⟩ can be realised as uvular fricatives [ʁ] and [χ] respectively.
In the consonantal system of Najdi Arabic, there is an occurrence of the alveolar affricates [t͡s] and [d͡z] as allophonic variants of the velar stops /k/ and /g/, respectively.