CAT Caterpillar S31 Loudspeaker Buzzer Ringer Speaker Replacement

If your CAT Caterpillar S31 has weak ringtone volume, distorted speaker sound, or you can’t hear alerts properly, the bottom S31 loudspeaker (ringer/buzzer speaker) may be worn, blocked, or damaged. This replacement part is designed to restore clear, loud sound for ringtones, notifications, alarms, and media audio.

Loudspeaker problems often start gradually. The phone may still play sound, but it becomes quieter, crackly, or cuts out at higher volume. In some cases, the speaker grille can be blocked by dust, lint, or moisture residue—especially on rugged phones used outdoors. If cleaning doesn’t improve the sound, replacing the loudspeaker module is a common repair.

S31 loudspeaker fault symptoms (ringer / buzzer sound)

• Ringtone is very low even at maximum volume
• Distorted, crackling, or buzzing sound from the loudspeaker
• No sound for calls on speakerphone
• Alarms and notifications are too quiet or not audible
• Media audio (music/video) sounds muffled or cuts out

CAT S31 ringer speaker replacement part details

• Part type: Loudspeaker / ringer / buzzer speaker (bottom speaker)
• Use: Restores ringtone, alerts, speakerphone and media sound
• Included: 1x replacement loudspeaker (as pictured)

CAT S31 loudspeaker compatibility

Model: CAT Caterpillar S31. Please compare your original part with the listing images to ensure the shape and contact layout match before ordering.

Before replacing the S31 loudspeaker (quick checks)

It’s worth doing a few checks first because low sound can sometimes be caused by settings or blockage rather than a failed speaker.

Check S31 ringtone speaker & volume settings

• Increase ringtone and media volume to maximum
• Turn off “Do Not Disturb” and confirm vibration-only mode is not enabled
• Try a different ringtone to rule out a corrupted audio file

Test CAT S31 loudspeaker (speakerphone and media)

• Play a short video and listen for distortion at different volume levels
• Make a call and switch to speakerphone to confirm the loudspeaker is affected

Clean the S31 loudspeaker grille safely

• Power off the phone
• Use a soft brush to remove dust from the grille
• Avoid pushing sharp objects into the grille (can puncture the speaker)

S31 loudspeaker installation notes

Replacing the loudspeaker typically requires opening the phone and removing the rear housing to access the speaker module. If you’re not used to phone repairs, professional fitting is recommended. Using plastic pry tools helps reduce the risk of damaging clips, seals, or nearby components.

S31 loudspeaker fitting tips

• Keep screws organized (some may be different lengths)
• Make sure the loudspeaker sits flush in its housing
• Check the contact pads are clean and aligned properly
• Test sound before fully reassembling the device

After-install S31 loudspeaker sound tests

• Play a ringtone at high volume (should be clear, not rattly)
• Test alarms and notification sounds
• Test speakerphone during a call
• Play music/video to confirm consistent loud output

CAT S31 loudspeaker FAQs (ringer speaker questions)

S31 loudspeaker vs CAT S31 earpiece speaker

No. The earpiece (receiver) is the top speaker used mainly for calls at your ear. This listing is for the S31 loudspeaker used for ringtones, speakerphone and media audio.

Will a new CAT S31 buzzer speaker fix buzzing?

Buzzing can be caused by a damaged speaker cone or loose seating. A new ringer/buzzer speaker usually resolves this, as long as the housing and contacts are intact.

Why buy from OtusBargains

• Quality-checked replacement parts
• Fast dispatch from Ireland
• 30-Day Money-Back Guarantee for peace of mind
• Support if you need help choosing the right part

Related products

• Phone & Tablet Parts
• Tools & Accessories

CAT S31 phone information (external, not a parts store)

CAT S31 device specs (GSMArena):

https://www.gsmarena.com/cat_s31-8880.php