• SHOP
  • CLUB
0
My Garage
Add vehicle
0
items #
£0.00
Your basket is empty

It is necessary to choose your car model, otherwise you risk buying an item that does not fit. Please note that our search function only provides results relevant to a certain vehicle type.

Alternator, Alternator regulator, Pulley 89FF10300AB

An OEM number is a unique code containing letters and digits. Car manufacturers use them to mark every part inside their cars. A non-original car part carrying an OEM number demonstrates that the part meets stringent car manufacturer standards and its parameters and technical specifications are identical to original equipment.

All spare parts in the list below are equivalent to OEM number 89 FF 10 300 AB:

  • 89 FF 10 300 AB (original number of FORD)
  • 89 FF 10 300 AB (original number of FORD USA)
  • 89 FF 10 300 AB (original number of OPEL)


Alternator, Alternator regulator, Pulley OEM 89 FF 10 300 AB: Cost and Alternatives

Price £ 4 - 168
OEM Brand A.Fyreco, AD KÜHNER, ALANKO, AS-PL, AUTOELECTRO, BOSCH
Car maker FORD, FORD USA, GEO, OPEL
OEM 89FF10300AB Equivalents 89FF10300AB, 89 FF 10 300 AB, 89 FF 10300 AB, 89FF 10300 AB, 89FF-10300-AB
Manufacturers
Filter
104 items
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Pulleys: with belt pulley
  • Rated Voltage [V]: 14
  • Belt Pulley Ø [mm]: 65
  • Number of grooves: 1
  • Vehicle Main Current: for vehicles with 12V main current
  • Rotation Direction: Clockwise rotation
  • Alternator Type: excl. vacuum pump
  • Fastening Type: 3-point attachment
  • Recommended additional repairs: V-Belt / V-Ribbed Belt
  • Clamp: B+ (M6)
  • Bore Diameter 1 [mm]: 8
  • Number of mounting bores: 3
  • Number of threaded holes: 1
  • Thread Size: M8
  • Distance from belt pulley to alternator [mm]: 36
  • Item number: 4G0776
  • Our price: £73.99
  • Manufacturer: RIDEX
  • EAN number: 4064138048057
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock
-45%
compared to RRP £135.50

£73.99
Price per item

price incl. 20% VAT

excl. delivery costs

  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Pulleys: with multi-belt pulley
  • Rated Voltage [V]: 14
  • Belt Pulley Ø [mm]: 56
  • Number of grooves: 3
  • Vehicle Main Current: for vehicles with 12V main current
  • Rotation Direction: Clockwise rotation
  • Alternator Type: excl. vacuum pump
  • Fastening Type: 3-point attachment
  • Clamp: B+ (M6), W
  • Bore Diameter 1 [mm]: 8
  • Number of mounting bores: 3
  • Number of threaded holes: 1
  • Distance from belt pulley to alternator [mm]: 43,6
  • Item number: 4G0102
  • Our price: £92.99
  • Manufacturer: RIDEX
  • EAN number: 4059191675128
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock
-39%
compared to RRP £152.50

£92.99
Price per item

price incl. 20% VAT

excl. delivery costs

WALKER WAL02244 WAL02244 Alternator WALKER 89 FF 10300 AB MERCEDES-BENZ
Alternator WALKER 89 FF 10 300 AB12V, 55A, Plug, 0001, Ø 55 mm
Article number: WAL02244
Submit a review
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Belt Pulley Ø [mm]: 55
  • Number of ribs: 3
  • Plug Type ID: 0001
  • Vehicle Main Current: for vehicles with 12V main current
  • Clamp: Plug
  • Bore Diameter 1 [mm]: 8
  • Net weight [kg]: 4,6
  • Item number: WAL02244
  • Our price: £77.99
  • Manufacturer: WALKER
  • EAN number: 4060426584795
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock (Item(s) left: 1)
£77.99

price incl. 20% VAT

excl. delivery costs

  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Pulleys: with belt pulley
  • Rated Voltage [V]: 14
  • Belt Pulley Ø [mm]: 65
  • Number of grooves: 1
  • Vehicle Main Current: for vehicles with 12V main current
  • Rotation Direction: Clockwise rotation
  • Alternator Type: excl. vacuum pump
  • Fastening Type: 3-point attachment
  • Recommended additional repairs: V-Belt / V-Ribbed Belt
  • Clamp: B+ (M6)
  • Bore Diameter 1 [mm]: 8
  • Number of mounting bores: 3
  • Number of threaded holes: 1
  • Thread Size: M8
  • Distance from belt pulley to alternator [mm]: 36
  • Item number: SKGN-0320998
  • Our price: £85.99
  • Manufacturer: STARK
  • EAN number: 4064138048040
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock (Item(s) left: 2)
-36%
compared to RRP £135.50

£85.99
Price per item

price incl. 20% VAT

excl. delivery costs

  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Pulleys: with belt pulley
  • Rated Voltage [V]: 14
  • Belt Pulley Ø [mm]: 65
  • Number of grooves: 1
  • Vehicle Main Current: for vehicles with 12V main current
  • Rotation Direction: Clockwise rotation
  • Alternator Type: excl. vacuum pump
  • Fastening Type: 3-point attachment
  • Recommended additional repairs: V-Belt / V-Ribbed Belt
  • Clamp: B+ (M6)
  • Bore Diameter 1 [mm]: 8
  • Number of mounting bores: 3
  • Number of threaded holes: 1
  • Thread Size: M8
  • Distance from belt pulley to alternator [mm]: 36
  • Item number: 4G0776R
  • Our price: £101.49
  • Manufacturer: RIDEX REMAN
  • EAN number: 4067448092161
  • Condition: Remanufactured
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock (Item(s) left: 6)
£101.49
Price per item

price incl. 20% VAT

excl. delivery costs

A core charge of £20.93 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
MAPCO 113615 Sample photo only 113615 Alternator MAPCO 89FF10300AB VW
Alternator MAPCO 89 FF 10 300 AB12V, 55A, Plug, Ø 55 mm
Article number: 113615
Submit a review
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Belt Pulley Ø [mm]: 55
  • Number of ribs: 3
  • Vehicle Main Current: for vehicles with 12V main current
  • Clamp: Plug
  • Bore Diameter 1 [mm]: 8
  • Length 3 [mm]: 83
  • Item number: 113615
  • Our price: £102.49
  • Manufacturer: MAPCO
  • EAN number: 4043605806956
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock
-72%
compared to RRP £370.30

£102.49

price incl. 20% VAT

excl. delivery costs

  • Alternator Charging Current [A]: 75
  • Voltage [V]: 12
  • Belt Pulley Ø [mm]: 70
  • Number of ribs: 3
  • Connector / Clamp: with connection for speed sensor
  • Fastening Type: Double Pivot Lever
  • for OE number: 54022385
  • Item number: QRA2078
  • Our price: £103.99
  • Manufacturer: QUINTON HAZELL
  • EAN number: 5050438344301
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock (Item(s) left: 1)
-71%
compared to RRP £365.71

£103.99

price incl. 20% VAT

excl. delivery costs

Alternator AS-PL 89 FF 10 300 AB12V, 55A
Article number: A4119
Submit a review
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Pulleys: with belt pulley
  • Diameter [mm]: 64,00
  • Quality: STANDARD LINE
  • Version: LRA462
  • New part without deposit
  • Item number: A4119
  • Our price: £106.99
  • Manufacturer: AS-PL
  • EAN number: 5902129029175
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock (Item(s) left: 4)
-25%
compared to RRP £144.08

£106.99

price incl. 20% VAT

excl. delivery costs

Alternator AS-PL 89 FF 10 300 AB12V, 55A
Article number: A4108
Reviews - 1
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Pulleys: with belt pulley
  • Diameter [mm]: 64,00
  • Quality: STANDARD LINE
  • New part without deposit
  • Item number: A4108
  • Our price: £107.49
  • Manufacturer: AS-PL
  • EAN number: 5901259490961
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock
-23%
compared to RRP £139.55

£107.49

price incl. 20% VAT

excl. delivery costs

  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Manufacturer Restriction: LUCAS ELE
  • Pulleys: without belt pulley
  • Plug Type ID: CPA0008
  • Supplementary Article / Supplementary Info: with integrated regulator
  • Connector / Clamp: with connection for speed sensor
  • Clamp: M6
  • Number of mounting bores: 3
  • Number of threaded holes: 1
  • Manufacturer: FORD
  • Item number: CAL25107AS
  • Our price: £108.49
  • Manufacturer: CASCO
  • EAN number: 2248410878334
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock (Item(s) left: 2)
£108.49

price incl. 20% VAT

excl. delivery costs

Alternator AS-PL 89 FF 10 300 AB12V, 55A
Article number: A4067
Submit a review
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Pulleys: with belt pulley
  • Quality: STANDARD LINE
  • Version: LRB122
  • New part without deposit
  • Item number: A4067
  • Our price: £109.49
  • Manufacturer: AS-PL
  • EAN number: 5901259405613
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock
-23%
compared to RRP £143.02

£109.49

price incl. 20% VAT

excl. delivery costs

Alternator AUTOELECTRO 89 FF 10 300 AB12V, 55A, B+, D+
Article number: AEA1222
Submit a review
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Pulleys: without belt pulley
  • Number of ribs 0
  • Plug Type ID: B+, D+
  • Number of mounting bores: 3
  • Plug Type: Plug Terminal
  • Item number: AEA1222
  • Our price: £116.99
  • Manufacturer: AUTOELECTRO
  • EAN number: 5056348600186
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
Free delivery on this item
In stock
£116.99

price incl. 20% VAT

free delivery

Alternator BV PSH 89 FF 10 300 AB12V, 70A, B+ (M6), Ø 63,5 mm
Article number: 595.002.055.100
Submit a review
  • Alternator Charging Current [A]: 70
  • Voltage [V]: 12
  • Belt Pulley Ø [mm]: 63,5
  • Number of grooves: 1
  • Clamp: B+ (M6)
  • Quality: +Line Original
  • Number of mounting bores: 3
  • Mounting Angle [degrees]: +60
  • Item number: 595.002.055.100
  • Our price: £121.99
  • Manufacturer: BV PSH
  • EAN number: 8720264056996
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
Get a bonus of £0.89 when you purchase this product
You will receive £0.89 in your bonus account if you buy this product:
  • Accumulate your bonuses through purchasing items marked “BONUS";
  • Pay for up to 10% of your order with the accumulated bonuses;
More
In stock
£121.99

price incl. 20% VAT

excl. delivery costs

Alternator BV PSH 89 FF 10 300 AB12V, 55A, B+ (M6), Ø 55,0 mm
Article number: 595.045.055.100
Submit a review
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Belt Pulley Ø [mm]: 55,0
  • Number of grooves: 1
  • Clamp: B+ (M6)
  • Quality: +Line Original
  • Number of mounting bores: 3
  • Mounting Angle [degrees]: +60
  • Item number: 595.045.055.100
  • Our price: £126.99
  • Manufacturer: BV PSH
  • EAN number: 8720264407156
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
Get a bonus of £0.93 when you purchase this product
You will receive £0.93 in your bonus account if you buy this product:
  • Accumulate your bonuses through purchasing items marked “BONUS";
  • Pay for up to 10% of your order with the accumulated bonuses;
More
In stock
£126.99

price incl. 20% VAT

excl. delivery costs

  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Belt Pulley Ø [mm]: 70
  • Number of ribs: 3
  • Position / Degree: re 60
  • Connector / Clamp: with connection for speed sensor
  • Fastening Type: Double Pivot Lever
  • Item number: 9036060
  • Our price: £136.99
  • Manufacturer: ROTOVIS Automotive Electrics
  • EAN number: 4011930360603
  • Condition: Remanufactured
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
Get a bonus of £0.92 when you purchase this product
You will receive £0.92 in your bonus account if you buy this product:
  • Accumulate your bonuses through purchasing items marked “BONUS";
  • Pay for up to 10% of your order with the accumulated bonuses;
More
In stock (Item(s) left: 1)
£136.99

price incl. 20% VAT

excl. delivery costs

Alternator HELLA 89 FF 10 300 AB14V, 55A, Ø 56 mm
Article number: 8EL 012 428-881
Submit a review
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 14
  • Pulleys: with V-ribbed belt pulley
  • Belt Pulley Ø [mm]: 56
  • Number of grooves: 3
  • Used part return not required
  • New part without deposit
  • Assy. / disassy. by qualified personnel required!
  • Item number: 8EL 012 428-881
  • Our price: £167.99
  • Manufacturer: HELLA
  • EAN number: 4082300549027
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
Free delivery on this item
In stock (Item(s) left: 1)
-10%
compared to RRP £186.76

£167.99

price incl. 20% VAT

free delivery

  • Voltage [V]: 14
  • Charging Voltage [V]: 14,5
  • Item number: 131277
  • Our price: £7.99
  • Manufacturer: HC-Cargo
  • EAN number: 2248198951316
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock
£7.99

price incl. 20% VAT

excl. delivery costs

HC-Cargo F 032 131 277 131277 F032131277 Alternator HC-Cargo 89 FF 10300 AB MERCEDES-BENZ
Alternator Regulator HC-Cargo 89 FF 10 300 ABVoltage: 14V
Article number: F 032 131 277
Submit a review
  • Voltage [V]: 14
  • Charging Voltage [V]: 14,5
  • Item number: F 032 131 277
  • Our price: £9.59
  • Manufacturer: HC-Cargo
  • EAN number: 5705541062429
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock
£9.59

price incl. 20% VAT

excl. delivery costs

HC-Cargo F 032 131 304 131304 F032131304 Alternator HC-Cargo 89FF 10300 AB FORD
Rectifier, alternator HC-Cargo 89 FF 10 300 AB
Article number: F 032 131 304
Submit a review
  • Diameter [mm]: 120,0
  • Current Strength [A]: 35
  • Item number: F 032 131 304
  • Our price: £12.99
  • Manufacturer: HC-Cargo
  • EAN number: 5705541067561
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock
£12.99

price incl. 20% VAT

excl. delivery costs

Rectifier, alternator HC-Cargo 89 FF 10 300 AB
Article number: 131304
Submit a review
  • Diameter [mm]: 120,0
  • Current Strength [A]: 35
  • Number of diodes: 6
  • Item number: 131304
  • Our price: £13.49
  • Manufacturer: HC-Cargo
  • EAN number: 2248198951439
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock (Item(s) left: 1)
£13.49

price incl. 20% VAT

excl. delivery costs

Rectifier, alternator ERA 89 FF 10 300 AB
Article number: 215497
Reviews - 1
  • Height [mm]: 115
  • Item number: 215497
  • Our price: £17.49
  • Manufacturer: ERA
  • EAN number: 22100142944917294491
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock (Item(s) left: 2)
£17.49

price incl. 20% VAT

excl. delivery costs

Bearing HC-Cargo 89 FF 10 300 AB40,0 mm x 17,00 mm
Article number: 140087
Submit a review
  • Quality: OE
  • Inner Diameter [mm]: 17,00
  • Diameter [mm]: 40,0
  • Item number: 140087
  • Our price: £4.29
  • Manufacturer: HC-Cargo
  • EAN number: 2248198984121
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock (Item(s) left: 1)
£4.29

price incl. 20% VAT

excl. delivery costs

Bearing ERA 89 FF 10 300 AB40 mm x 17 mm x 12 mm
Article number: 218025
Submit a review
  • Inner Diameter [mm]: 17
  • Diameter [mm]: 40
  • Height [mm]: 12
  • Item number: 218025
  • Our price: £6.59
  • Manufacturer: ERA
  • EAN number: 8053379129652
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock
£6.59

price incl. 20% VAT

excl. delivery costs

HC-Cargo F 032 140 087 140087 F032140087 Alternator HC-Cargo 89FF 10300 AB FORD
Drive Bearing, alternator HC-Cargo 89 FF 10 300 AB40,0 mm x 17,00 mm
Article number: F 032 140 087
Submit a review
  • Inner Diameter [mm]: 17,00
  • Diameter [mm]: 40,0
  • Item number: F 032 140 087
  • Our price: £4.59
  • Manufacturer: HC-Cargo
  • EAN number: 5705541081260
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
In stock
£4.59

price incl. 20% VAT

excl. delivery costs

STARDAX STX100479 STX100479 Alternator STARDAX 89FF-10300-AB VAUXHALL
Alternator STARDAX 89 FF 10 300 AB12V, 55A, Ø 55 mm
Article number: STX100479
Submit a review
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Pulleys: V-Ribbed Belt Pulley
  • Belt Pulley Ø [mm]: 55
  • Number of ribs: 3
  • Number of grooves: 3
  • Exchange Part
  • Connector / Clamp: with connection for speed sensor
  • Item number: STX100479
  • Our price: £53.49
  • Manufacturer: STARDAX
  • EAN number: 7900003742521
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
Сurrently out of stock
£53.49

price incl. 20% VAT

excl. delivery costs

A core charge of £22.86 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Belt Pulley Ø [mm]: 55
  • Number of ribs: 3
  • Plug Type ID: 0001
  • Vehicle Main Current: for vehicles with 12V main current
  • Clamp: Plug
  • Bore Diameter 1 [mm]: 8
  • Net weight [kg]: 4,6
  • Length 4 [mm]: 11,0
  • Item number: 28-1792
  • Our price: £55.99
  • Manufacturer: ELSTOCK
  • EAN number: 2222694232920
  • Condition: Remanufactured
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
Сurrently out of stock
£55.99

price incl. 20% VAT

excl. delivery costs

A core charge of £26.11 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
JP GROUP 1590101309 Sample photo only 9036060 1590101309 Alternator JP GROUP 89 FF 10 300 AB AUDI
Alternator JP GROUP 89 FF 10 300 AB12V, 55A, Ø 55 mm, QH
Article number: 1590101309
Submit a review
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Supplementary Info: QH
  • Belt Pulley Ø [mm]: 55
  • Number of ribs: 3
  • Item number: 1590101309
  • Our price: £64.49
  • Manufacturer: JP GROUP
  • EAN number: 5710412261740
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
Сurrently out of stock
£64.49

price incl. 20% VAT

excl. delivery costs

  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Pulleys: for v-belt pulley
  • Belt Pulley Ø [mm]: 60
  • Number of ribs: 1
  • Plug Type ID: B+(M6),D+,B+,B+
  • Exchange Part
  • Rotation Direction: Clockwise rotation
  • Number of mounting bores: 3
  • Number of threaded holes: 1
  • Quantity Unit: Piece
  • Item number: 11441810
  • Our price: £66.49
  • Manufacturer: ALANKO
  • EAN number: 4053082231684
  • Condition: Remanufactured
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
Сurrently out of stock
£66.49

price incl. 20% VAT

excl. delivery costs

Alternator LAUBER 89 FF 10 300 AB12V, 55A
Article number: 11.0561
Submit a review
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Pulleys: V-Ribbed Belt Pulley
  • Number of grooves: 3
  • Exchange Part
  • Connector / Clamp: with connection for speed sensor
  • Item number: 11.0561
  • Our price: £72.49
  • Manufacturer: LAUBER
  • EAN number: 5901321823420
  • Condition: Remanufactured
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Contents of the Alternator LAUBER set:
Description of the product
Units
Article number
Alternator Regulator
1
CQ1010647
Pulley, alternator
1
CQ1040592
Protective Cap, alternator
1
CQ1190001
Details
Сurrently out of stock
£72.49

price incl. 20% VAT

excl. delivery costs

A core charge of £12.45 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
Alternator BV PSH 89 FF 10 300 AB12V, 55A, M6 B+, Ø 63,5 mm
Article number: 595.002.055.210
Submit a review
  • Alternator Charging Current [A]: 55
  • Voltage [V]: 12
  • Belt Pulley Ø [mm]: 63,5
  • Number of ribs: 1
  • Vehicle Main Current: for vehicles with 12V main current
  • Clamp: M6 B+
  • Quality: Bosch New
  • Number of mounting bores: 3
  • Mounting Angle [degrees]: 60
  • Item number: 595.002.055.210
  • Our price: £74.99
  • Manufacturer: BV PSH
  • EAN number: 70595002055210
  • Condition: New
  • Reference number OEM: 89FF10300AB
Show OEM numbers of the product
Details
Сurrently out of stock
£74.99

price incl. 20% VAT

excl. delivery costs

Load more
  • 1
  • 2
  • 3
  • 4
The best offers: