2021 Ram 3500 Electrical Parts

This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator. Read more

54 Alternator / Generator parts are listed for the 2021 Ram 3500, from REMY, TERREPOWER, PURE ENERGY and 8 other brands. MOPAR 4801769AB carries the "Popular" badge. Grades run from New through Remanufactured; Remanufactured is the most populated section, led by REMY, TERREPOWER, FVP and 4 other brands.

This table covers the pulleys on the alternator shaft. Typical signs include a growl or chirp that follows engine speed, or a pulley that will not spin freely by hand. Spin each pulley with the belt off. Roughness or play means replace it with the belt. Read more

This group shows a single part: DORMAN 300435.

This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery. Read more

8 Battery parts for the 2021 Ram 3500 come from 8 brands — DEKA, FVP, ACDELCO and 5 other brands. The "Popular" part is DEKA 9A94R. Every part fits both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged.

In the AGM (Extended Life) grade, DEKA, FVP, ACDELCO and 4 other brands supply 7 parts: grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. A representative part number is DEKA 9A94R.

In the Performance AGM (Extended Life + Increased Power) grade, FULLRIVER supplies 1 part: grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. A representative part number is FULLRIVER FT85094R.

This group includes DEKA 9A94R, FVP P94RAGM and ACDELCO 94RAGM and the remaining parts above.

This table covers the positive and ground cables that run from the battery. Typical signs include a stretched or frayed cable, or a control that no longer reaches the end of its travel. Route the new cable through the same clips. A kinked cable binds and fails early. Read more

MOPAR supplies the 9 Battery Cable parts for the 2021 Ram 3500.

Listed part numbers: MOPAR 68606646AA, MOPAR 5059001AC and MOPAR 68092086AA, plus the other parts above.

This table covers the Battery covers. Read more

One part is listed for the 2021 Ram 3500 — MOPAR 68497403AA.

This table covers the Battery Current sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

One part is listed for the 2021 Ram 3500 — MOPAR 68370876AB.

This table covers the Battery Heat shields. Typical signs include a bent shield rubbing a rotor, or rust-through that leaves the backing open. A rubbing shield will eat a new rotor. Straighten or replace it before the wheel goes back on. Read more

One part is listed for the 2021 Ram 3500 — MOPAR 68494324AA.

This table covers the trays the battery sits in. Read more

This group shows a single part: MOPAR 68673610AA.

This table covers the Blind Spot Detection sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

MOPAR supplies both parts for the 2021 Ram 3500. All of them fit every engine offered in the 2021 3500.

Part numbers include MOPAR 68263397AE and MOPAR 68548895AA.

This table covers the Door control modules. Read more

4 Door Control Module parts for the 2021 Ram 3500 come from MOPAR. Every part fits both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged.

This group includes MOPAR 68374088AG, MOPAR 68374089AG and MOPAR 68374090AG and the remaining parts above.

This table covers the replacement fuses for this vehicle's fuse boxes. Typical signs include one circuit dead while its neighbor still works, or a fuse that blows again as soon as you replace it. Match amperage and fuse type. A repeat blow means a short — find it before the next fuse. Read more

9 Fuse parts for the 2021 Ram 3500 come from MOPAR. The "Popular" part is MOPAR 68241002AA. 4 parts fit every engine; the other 5 are engine-specific.

The 20 Amp section lists 2 options from MOPAR — grouped under the catalog's "20 Amp" designation — the notes column spells out what sets them apart. MOPAR 68202896AA is listed in this group.

In the 250 Amp grade, MOPAR supplies 1 part: grouped under the catalog's "250 Amp" designation — the notes column spells out what sets them apart. A representative part number is MOPAR 68241002AA.

In the 30 Amp grade, MOPAR supplies 2 parts: grouped under the catalog's "30 Amp" designation — the notes column spells out what sets them apart. A representative part number is MOPAR 68144653AA.

The 40 Amp section lists 1 option from MOPAR — grouped under the catalog's "40 Amp" designation — the notes column spells out what sets them apart. MOPAR 68144445AA is listed in this group.

In the 5 Amp grade, MOPAR supplies 1 part: grouped under the catalog's "5 Amp" designation — the notes column spells out what sets them apart. A representative part number is MOPAR 68202832AB.

In the 50 Amp grade, MOPAR supplies 1 part: grouped under the catalog's "50 Amp" designation — the notes column spells out what sets them apart. A representative part number is MOPAR 68144446AA.

The 60 Amp section lists 1 option from MOPAR — grouped under the catalog's "60 Amp" designation — the notes column spells out what sets them apart. MOPAR 68144447AA is listed in this group.

Part numbers include MOPAR 68241002AA, MOPAR 68202896AA and MOPAR 68144442AA, among others listed above.

This table covers the fuse blocks that hold this vehicle's fuses. Read more

MOPAR supplies both parts for the 2021 Ram 3500.

This group includes MOPAR 68437288AB and MOPAR 68437289AB.

This table covers the Fuse Box covers. Read more

This group shows a single part: MOPAR 68202821AA.

This table covers the horns mounted in the front of the vehicle. Read more

This group shows a single part: MOPAR 68297891AC.

This table covers the receivers that pick up the key-fob unlock signal. Read more

MOPAR supplies the 3 Keyless Entry Module / Receiver parts for the 2021 Ram 3500. All of them fit every engine offered in the 2021 3500.

This group includes MOPAR 56046957AA, MOPAR 56046958AA and MOPAR 68186637AA.

This table covers the key fobs that lock, unlock and start the vehicle. Read more

MOPAR supplies the 5 Keyless Entry Remote parts for the 2021 Ram 3500. MOPAR 68575430AA carries the "Popular" badge. All of them fit every engine offered in the 2021 3500.

Part numbers include MOPAR 68575430AA, MOPAR 68365327AC and MOPAR 68538051AB, among others listed above.

This table covers the Lane Departure Camera modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

One part is listed for the 2021 Ram 3500 — STANDARD MOTOR PRODUCTS LDS60.

This table covers the ultrasonic park-aid sensors in the bumper. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

6 Parking Aid Sensor parts are listed for the 2021 Ram 3500, from DORMAN, STANDARD MOTOR PRODUCTS and TECHPRO. DORMAN 684102 carries the "Popular" badge. All of them fit every engine offered in the 2021 3500.

This group includes DORMAN 684102, STANDARD MOTOR PRODUCTS PPS110 and DORMAN 684126 and the remaining parts above.

This table covers the Power inverters. Read more

MOPAR supplies both parts for the 2021 Ram 3500. All of them fit every engine offered in the 2021 3500.

Part numbers include MOPAR 68312754AC and MOPAR 68519993AB.

This table covers the capacitors that suppress radio noise. Read more

This group shows a single part: STANDARD MOTOR PRODUCTS RC33.

This table covers the Rain sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

MOPAR supplies both parts for the 2021 Ram 3500. All of them fit every engine offered in the 2021 3500.

This group includes MOPAR 68298334AA and MOPAR 68298468AA.

This table covers the Serial Data Gateway modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

MOPAR supplies both parts for the 2021 Ram 3500. All of them fit every engine offered in the 2021 3500.

Listed part numbers: MOPAR 68454413AA and MOPAR 68404893AB.

This table covers the speed sensors on the transmission, transfer case or ABS ring. Typical signs include a dead speedometer, harsh transmission shifts, or a code for vehicle speed. Inspect the tone wheel and the connector before replacing the sensor. Read more

11 Speed Sensor parts for the 2021 Ram 3500 come from 7 brands — BECK/ARNLEY, DELPHI, MOPAR and 4 other brands. The "Popular" part is ULTRA-POWER SC658. 4 parts fit every engine; the other 7 are engine-specific.

The Economy section lists 5 options from BECK/ARNLEY, ULTRA-POWER, AUTOTECNICA and 1 other brand — the catalog's value-priced group. ULTRA-POWER SC658 is listed in this group.

In the Standard Replacement grade, DELPHI, MOPAR and STANDARD MOTOR PRODUCTS supply 6 parts: built to original-equipment specification. A representative part number is DELPHI SS11424.

This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

14 Starter Motor parts are listed for the 2021 Ram 3500, from MOPAR, WAI GLOBAL, PURE ENERGY and 5 other brands. TYC 119971 carries the "Popular" badge.

In the New grade, WAI GLOBAL, TYC and MOPAR supply 4 parts: brand-new units rather than rebuilt ones. A representative part number is TYC 119971.

In the Remanufactured grade, PURE ENERGY, FVP, REMY and 3 other brands supply 10 parts: factory-rebuilt units with new wear components. A representative part number is PURE ENERGY 19971.

This table covers the Starter Motor Heat shields. Typical signs include a bent shield rubbing a rotor, or rust-through that leaves the backing open. A rubbing shield will eat a new rotor. Straighten or replace it before the wheel goes back on. Read more

This group shows a single part: MOPAR 68371509AA.