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Mercedes S123 250 2.5 Alternator (140 hp Petrol M 123.921)

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85 items
    • Construction Year from: 09 / 1979
    • Engine Code: M 123.921
    • Transmission Type: 5-Speed Manual Transmission
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Product line: REMANUFACTURED PREMIUM
  • Belt Pulley Ø [mm]: 75
  • Number of ribs: 1
  • Exchange Part
  • Position / Degree: L 60
  • Rotation Direction: Clockwise rotation
  • Fastening Type: Double Pivot Lever
  • Clamp: B+ / B+ / D+
  • Weight [kg]: 4,902
  • Item number: 436121
  • Our price: 127,57 €
  • Manufacturer: VALEO
  • EAN number: 3276424361219
  • Condition: Remanufactured
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Contents of the Alternator VALEO set:
Description of the product
Units
Article number
Alternator
1
9AR2759K
Alternator
1
9AR2784
Alternator
1
9AR2785
Alternator
1
9AR2846
Alternator
1
9AR5028K01
Details
Сurrently out of stock
127,57 €

price incl. 23% VAT

excl. delivery costs

A core charge of 61,50 € (incl. 23% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
  • Alternator Charging Current [A]: 65
  • Voltage [V]: 14
  • Pulleys: with belt pulley
  • Belt Pulley Ø [mm]: 73
  • Plug Type ID: PL22
  • Alternator Type: excl. vacuum pump
  • Diameter [mm]: 70
  • TecDoc Engine Number: M 123.921
  • Item number: 063733140010
  • Our price: 131,93 €
  • Manufacturer: MAGNETI MARELLI
  • EAN number: 8050947032260
  • Condition: New
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Details
Сurrently out of stock
-53%
compared to RRP 286,71 €

131,93 €

price incl. 23% VAT

excl. delivery costs

VEMO Original Quality V30-13-30720 Alternator 14V, 55A
Article number: V30-13-30720
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  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Product line: Original Quality
  • Engine Code: M123.921
  • New Part
  • Weight [kg]: 4,24
  • New part without deposit
  • Packaging width [cm]: 23,5
  • Packaging height [cm]: 22
  • Item number: V30-13-30720
  • Our price: 134,01 €
  • Manufacturer: VEMO
  • EAN number: 4046001325571
  • Condition: New
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Details
Сurrently out of stock
134,01 €

price incl. 23% VAT

excl. delivery costs

NK 4830721 Alternator 12V, 55A, Plug, 0001, Ø 70 mm
Article number: 4830721
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  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Belt Pulley Ø [mm]: 70
  • Number of ribs: 1
  • Plug Type ID: 0001
  • Vehicle Main Current: for vehicles with 12V main current
  • Clamp: Plug
  • Bore Diameter 1 [mm]: 10
  • Net weight [kg]: 5,35
  • Item number: 4830721
  • Our price: 134,22 €
  • Manufacturer: NK
  • EAN number: 5700755261552
  • Condition: New
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Details
Сurrently out of stock
134,22 €

price incl. 23% VAT

excl. delivery costs

55773 Generator Mercedes-Benz 123-Series 250T (123.086) 140 hp 103 kW M 123.921 1982 S123 A42 EAI 55773 Mercedes S123 250T (123.086) Generator 140 hp Petrol 1978 cost
EAI 55773 Alternator 12V, 55A, with integrated regulator
Article number: 55773
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  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Pulleys: with belt pulley
  • Number of ribs: 1
  • Supplementary Article / Supplementary Info: with integrated regulator
  • Rotation Direction: Clockwise rotation
  • Connector / Clamp: without connection for speed sensor
  • Diameter [mm]: 82
  • Technical Information Number: C01
  • Drive Shaft: with ABS ring
  • Item number: 55773
  • Our price: 142,35 €
  • Manufacturer: EAI
  • EAN number: 3596405577300
  • Condition: New
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Details
Сurrently out of stock
142,35 €

price incl. 23% VAT

excl. delivery costs

A core charge of 56,25 € (incl. 23% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
MESSMER 210111A Alternator 14V, 55A, B+D+, Ø 72 mm
Article number: 210111A
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  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Belt Pulley Ø [mm]: 72
  • Number of grooves: 1
  • Plug Type ID: B+D+
  • Rotation Direction: Clockwise rotation
  • Number of mounting bores: 2
  • Distance from belt pulley to alternator [mm]: 77
  • Belts: without V-belt
  • Item number: 210111A
  • Our price: 144,98 €
  • Manufacturer: MESSMER
  • EAN number: 8053379003532
  • Condition: New
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Details
Сurrently out of stock
144,98 €

price incl. 23% VAT

excl. delivery costs

  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Manufacturer Restriction: BOSCH
  • Pulleys: with belt pulley
  • Plug Type ID: CPA0007
  • Supplementary Article / Supplementary Info: with integrated regulator
  • Number of mounting bores: 2
  • Manufacturer: MERCEDES-BENZ
  • Item number: 2010118.0
  • Our price: 152,12 €
  • Manufacturer: SANDO
  • EAN number: 2245929174957
  • Condition: New
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Сurrently out of stock
152,12 €

price incl. 23% VAT

free delivery

944346033010 Alternator Mercedes-Benz 123-Series 250T (123.086) 140 hp 103 kW M 123.921 1980 S123 MRA03301 MAGNETI MARELLI 944346033010 Mercedes S123 250T (123.086) Generator 140 hp Petrol 1980 cost
MAGNETI MARELLI 944346033010 Alternator 14V, 55A
Article number: 944346033010
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  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Pulleys: with belt pulley
  • TecDoc Engine Number: M 123.921
  • Item number: 944346033010
  • Our price: 153,62 €
  • Manufacturer: MAGNETI MARELLI
  • EAN number: 8001063670546
  • Condition: Remanufactured
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Сurrently out of stock
153,62 €

price incl. 23% VAT

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0 986 031 431 Generator Mercedes-Benz 123-Series 250T (123.086) 140 hp 103 kW M 123.921 1981 S123 Sample photo only 3143 BOSCH 0986031431 Mercedes S123 250T (123.086) Alternators 140 hp Petrol 1979 cost
BOSCH 0 986 031 431 Alternator 14V, 55A
Article number: 0 986 031 431
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  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Exchange Part
  • Recommended additional repairs: V-Belt / V-Ribbed Belt
  • Item number: 0 986 031 431
  • Our price: 157,26 €
  • Manufacturer: BOSCH
  • EAN number: 3165141037128
  • Condition: Remanufactured
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Сurrently out of stock
157,26 €

price incl. 23% VAT

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PowerMax 89212592 Alternator 14V, 55A, Ø 66 mm
Article number: 89212592
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  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Belt Pulley Ø [mm]: 66
  • Number of grooves: 1
  • Distance of mounting bores [mm]: 56
  • Distance from belt pulley to alternator [mm]: 77
  • Item number: 89212592
  • Our price: 166,97 €
  • Manufacturer: PowerMax
  • EAN number: 5713852398274
  • Condition: New
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Сurrently out of stock
166,97 €

price incl. 23% VAT

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TT11506 PRO Alternator Mercedes-Benz 123-Series 250T (123.086) 140 hp 103 kW M 123.921 1978 S123 TESLA TECHNICS TT11506PRO Mercedes S123 250T (123.086) Generator 140 hp Petrol 1982 cost
TESLA TECHNICS TT11506 PRO Alternator 12V, 55A, M8, L, Ø 70 mm
Article number: TT11506 PRO
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  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Pulleys: with belt pulley
  • Belt Pulley Ø [mm]: 70
  • Number of grooves: 1
  • Clamp: M8, L
  • remanufactured spare part (REMAN)
  • Item number: TT11506 PRO
  • Our price: 169,17 €
  • Manufacturer: TESLA TECHNICS
  • EAN number: 8436250218261
  • Condition: New
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Сurrently out of stock
169,17 €

price incl. 23% VAT

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SE8005 Generator Mercedes-Benz 123-Series 250T (123.086) 140 hp 103 kW M 123.921 1979 S123 SE6005 SNRA SE8005 Mercedes S123 250T (123.086) Alternators 140 hp Petrol 1981 cost
SNRA SE8005 Alternator 12V, 55A, with integrated regulator
Article number: SE8005
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  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Pulleys: with belt pulley
  • Number of ribs: 1
  • Supplementary Article / Supplementary Info: with integrated regulator
  • Rotation Direction: Clockwise rotation
  • Connector / Clamp: without connection for speed sensor
  • Diameter [mm]: 73
  • Technical Information Number: C01
  • Item number: SE8005
  • Our price: 170,92 €
  • Manufacturer: SNRA
  • EAN number: 3660089304610
  • Condition: New
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Free delivery on this item
Сurrently out of stock
170,92 €

price incl. 23% VAT

free delivery

A core charge of 56,25 € (incl. 23% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
V30-13-31400 Alternators Mercedes-Benz 123-Series 250T (123.086) 140 hp 103 kW M 123.921 1980 S123 Sample photo only VEMO V301331400 Mercedes S123 250T (123.086) Alternator 140 hp Petrol 1980 cost
    • Construction Year from: 09 / 1979
    • Engine Code: 123.921
    • Transmission Code: 717.400
    • Transmission Type: Manual Transmission
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Supplementary Info: Q+, original equipment manufacturer quality MADE IN GERMANY
  • Belt Pulley Ø [mm]: 66
  • Number of ribs: 1
  • New Part
  • New part without deposit
  • Packaging width [cm]: 23,5
  • Packaging height [cm]: 22
  • Item number: V30-13-31400
  • Our price: 171,04 €
  • Manufacturer: VEMO
  • EAN number: 4046001477782
  • Condition: New
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Сurrently out of stock
171,04 €

price incl. 23% VAT

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AD KÜHNER 3087RI Alternator 12V, 55A, PL22
Article number: 3087RI
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  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Engine Code: M 123.921
  • Number of grooves: 1
  • Plug Type ID: PL22
  • Diameter [mm]: 69
  • Item number: 3087RI
  • Our price: 175,75 €
  • Manufacturer: AD KÜHNER
  • EAN number: 805622406943
  • Condition: New
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Сurrently out of stock
175,75 €

price incl. 23% VAT

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    • Construction Year from: 09 / 1981
    • Alternatively
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Pulleys: with belt pulley
  • Belt Pulley Ø [mm]: 77
  • Number of grooves: 1
  • Plug Type ID: PL22
  • Exchange Part
  • Rotation Direction: Clockwise rotation
  • Alternator Type: excl. vacuum pump
  • Fastening Type: Single pivoted lever
  • Recommended additional repairs: V-Belt / V-Ribbed Belt
  • Clamp: B+(9,8),D+
  • Length [mm]: 165
  • Distance from belt pulley to alternator [mm]: 78
  • Item number: 0 986 031 430
  • Our price: 219,32 €
  • Manufacturer: BOSCH
  • EAN number: 3165141019346
  • Condition: Remanufactured
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Сurrently out of stock
219,32 €

price incl. 23% VAT

free delivery

A core charge of 61,50 € (incl. 23% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
3087RIR Generator Mercedes-Benz 123-Series 250T (123.086) 140 hp 103 kW M 123.921 1978 S123 AD KÜHNER 3087RIR Mercedes S123 250T (123.086) Alternator 140 hp Petrol 1982 cost
AD KÜHNER 3087RIR Alternator 12V, 55A, PL22
Article number: 3087RIR
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  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Number of grooves: 1
  • Plug Type ID: PL22
  • Diameter [mm]: 69
  • Version: 3087RIR
  • Item number: 3087RIR
  • Our price: 235,15 €
  • Manufacturer: AD KÜHNER
  • EAN number: 8056224069448
  • Condition: New
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Сurrently out of stock
235,15 €

price incl. 23% VAT

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0 120 489 547 Alternators Mercedes-Benz 123-Series 250T (123.086) 140 hp 103 kW M 123.921 1979 S123 Sample photo only K1 (-) 14V 35A 20 BOSCH 0120489547 Mercedes S123 250T (123.086) Generator 140 hp Petrol 1981 cost
BOSCH 0 120 489 547 Alternator
Article number: 0 120 489 547
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  • Recommended additional repairs: V-Belt / V-Ribbed Belt
  • Item number: 0 120 489 547
  • Our price: 283,42 €
  • Manufacturer: BOSCH
  • EAN number: 40300120489547
  • Condition: New
Contents of the Alternator BOSCH set:
Description of the product
Units
Article number
1
1 197 311 090
1
6 033 GD5 100
1
1 126 610 060
1
1 125 045 010
Rotor, alternator
1
1 124 034 786
1
0 290 800 028
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Сurrently out of stock
283,42 €

price incl. 23% VAT

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BOSCH 0 986 032 800 Alternator 14V, 55A
Article number: 0 986 032 800
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    • Construction Year from: 09 / 1981
    • Alternatively
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Exchange Part
  • Recommended additional repairs: V-Belt / V-Ribbed Belt
  • Item number: 0 986 032 800
  • Our price: 304,85 €
  • Manufacturer: BOSCH
  • EAN number: 3165141037890
  • Condition: Remanufactured
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Сurrently out of stock
304,85 €

price incl. 23% VAT

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AD KÜHNER 30240RI Alternator 24V, 55A
Article number: 30240RI
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    • Construction Year from: 09 / 1979
    • Engine Code: 123.921
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 24
  • Item number: 30240RI
  • Our price: 306,35 €
  • Manufacturer: AD KÜHNER
  • EAN number: 805622406497
  • Condition: New
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Сurrently out of stock
306,35 €

price incl. 23% VAT

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BOSCH 0 120 489 917 Alternator 14V, 55A, excl. vacuum pump
Article number: 0 120 489 917
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    • Construction Year from: 09 / 1981
    • usable for vehicles with alternator charging current [A]: 55
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Pulleys: without belt pulley
  • Rotation Direction: Clockwise rotation
  • Alternator Type: excl. vacuum pump
  • Fastening Type: Single pivoted lever
  • Recommended additional repairs: V-Belt / V-Ribbed Belt
  • Length [mm]: 158,5
  • Item number: 0 120 489 917
  • Our price: 375,52 €
  • Manufacturer: BOSCH
  • EAN number: 3165142744131
  • Condition: New
Show OEM numbers of the product
Contents of the Alternator BOSCH set:
Description of the product
Units
Article number
1
1 197 311 028
1
1 125 045 012
1
1 124 034 360
Details
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Сurrently out of stock
375,52 €

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What is the best alternator for a Mercedes-Benz W123 Estate (S123) 2525 ccm?

The best alternators for Mercedes S123 250 T (123.086) models are from the following original brands:

  • RIDEX
  • DENSO
  • AS-PL
  • BV PSH
  • BOSCH

How much does an alternator for a MERCEDES-BENZ W123 Estate (S123) 250 T (123.086) cost?

The price of an alternator for the Mercedes S123 250 T (123.086) Petrol is typically between €127.57 and €375.52.

How to tell if the alternator on a Mercedes S123 250 T (123.086) is bad and what to do about it

If the alternator is not charging the battery properly, symptoms such as flickering lights or a loss of power may indicate a fault. The regulator, freewheel clutch and screws must be checked. If necessary, remove the alternator on the MERCEDES-BENZ W123 Estate (S123) 103 kW / 140 hp and replace it.

Which alternator do I need for a Mercedes S123 250 T (123.086) Petrol (Intake Manifold Injection/ Carburettor) 1978 - 1982?

Alternator output current [A] 55; 65
Pulley diameter [mm] 66; 70; 72; 73; 75; 77
Pulleys with belt pulley; without belt pulley
Weight [kg] 4.24; 4.902
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