• 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.

Brake caliper, Repair kit 93173731

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 93 173 731:

  • 93 173 731 (original number of OPEL)
  • 93 173 731 (original number of VAUXHALL)
  • 93 173 731 (original number of CHEVROLET)
  • 93 173 731 (original number of HOLDEN)
  • 93 173 731 (original number of SAAB)
  • 93 173 731 (original number of GMC)
  • 93 173 731 (original number of ISUZU)


Brake caliper, Repair kit OEM 93 173 731: Cost and Alternatives

Price £12.28 - £294.00
OEM Brand A.B.S., ABAKUS, Advantage Auto Parts, ATE, AUTOFREN SEINSA, BOSCH
Car maker OPEL, VAUXHALL, CHEVROLET, HOLDEN, SAAB, GMC, GENERAL MOTORS, ISUZU
OEM 93173731 Equivalents 93173731, 93 173 731
Manufacturers
Filter
50 items
  • Fitting Position: Front Axle Left, Front Axle
  • Brake Caliper Type: Floating Caliper, Brake Caliper (1 piston)
  • Material: Cast Iron
  • for brake disc thickness [mm]: 25
  • for brake disc diameter [mm]: 280, 288, 308
  • Brake Disc Type: Vented
  • Distance of mounting bores [mm]: 94
  • Piston Diameter [mm]: 57
  • Net weight [kg]: 3,2
  • Item number: 78B0241
  • Our price: £37.49
  • Manufacturer: RIDEX
  • EAN number: 4059191256389
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
-36%
compared to RRP £58.90

£37. 49

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

No core charge!
The best deal of the week
Brake caliper RIDEX 93 173 731Front Axle, 94 mm
Article number: 78B1735
Reviews - 5
  • Fitting Position: Front Axle
  • Brake Caliper Type: Floating Caliper, Brake Caliper (1 piston), Fist-type Caliper
  • for brake disc thickness [mm]: 25,0
  • Diameter 1 [mm]: 57
  • for brake disc diameter [mm]: 280,0, 288,0, 308,0
  • Brake Disc Type: Vented
  • Supplementary Article / Supplementary Info Info 2: without holding frame
  • Distance of mounting bores [mm]: 94
  • Quantity Unit: Set
  • Item number: 78B1735
  • Our price: £75.98
  • Manufacturer: RIDEX
  • EAN number: 4066016896217
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Contents of the Brake caliper RIDEX set:
Description of the product
Units
Article number
1
78B0241
1
78B0235
Details
In stock
-35%
compared to RRP £118.30

£75. 98
(Price per set)

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

  • Fitting Position: Front Axle
  • Supplementary Article / Supplementary Info Info 2: for reverse camera
  • Diameter: 57
  • Item number: 405R0096
  • Manufacturer: RIDEX
  • EAN number: 4059191609437
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Contents of the Repair Kit, brake caliper RIDEX set:
Description of the product
Units
Article number
Details
In stock
-57%
compared to RRP £29.20

£12. 28
Price per set of 1 pieces

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

  • Fitting Position: Front Axle Left, Front Axle
  • Brake Caliper Type: Floating Caliper, Brake Caliper (1 piston)
  • Material: Cast Iron
  • for brake disc thickness [mm]: 25
  • for brake disc diameter [mm]: 280, 288, 308
  • Brake Disc Type: Vented
  • Distance of mounting bores [mm]: 94
  • Piston Diameter [mm]: 57
  • Net weight [kg]: 3,2
  • Item number: 78B0241R
  • Our price: £31.49
  • Manufacturer: RIDEX REMAN
  • EAN number: 4067448112166
  • Condition: Remanufactured
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
£31. 49

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

A core charge of £21.85 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
  • Fitting Position: Front Axle Left, Front Axle
  • Brake Caliper Type: Floating Caliper, Brake Caliper (1 piston)
  • Material: Cast Iron
  • for brake disc thickness [mm]: 25
  • for brake disc diameter [mm]: 280, 288, 308
  • Brake Disc Type: Vented
  • Distance of mounting bores [mm]: 94
  • Piston Diameter [mm]: 57
  • Net weight [kg]: 3,2
  • Item number: SKBC-0460240
  • Our price: £37.49
  • Manufacturer: STARK
  • EAN number: 4059191095759
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
-36%
compared to RRP £58.90

£37. 49

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

  • Fitting Position: in front of axle, Front Axle Left
  • Brake System: ATE
  • Diameter: 57
  • Brake Caliper Type: Brake Caliper (1 piston)
  • Brake Disc Thickness: 25
  • Paired product: 342457
  • for brake disc diameter [mm]: 308
  • Item number: 342456
  • Our price: £39.49
  • Manufacturer: BUDWEG CALIPER
  • EAN number: 5705444062090
  • Condition: Remanufactured
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
£39. 49

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

A core charge of £21.85 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
Brake caliper TRW 93 173 731Cast Iron
Article number: BHX220E
Reviews - 4
  • Brake Caliper Type: Brake Caliper (1 piston)
  • Material: Cast Iron
  • Manufacturer Restriction: ATE
  • Exchange Part
  • Paired product: BHX221E
  • Observe technical data
  • Piston Diameter [mm]: 57
  • Item number: BHX220E
  • Our price: £40.99
  • Manufacturer: TRW
  • EAN number: 3322937397648
  • Condition: Remanufactured
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
-54%
compared to RRP £90.54

£40. 99

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

A core charge of £33.54 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
Brake caliper ABAKUS 93 173 731Front Axle Left
Article number: 131-04-017
Reviews - 2
  • Fitting Position: Front Axle Left
  • Brake System: ATE
  • Brake Caliper Type: Brake Caliper (1 piston)
  • for brake disc thickness [mm]: 25
  • Paired product: 131-04-018
  • for brake disc diameter [mm]: 308
  • New Part
  • Used part return not required
  • Piston Diameter [mm]: 57
  • Assy. / disassy. by qualified personnel required!
  • Item number: 131-04-017
  • Our price: £40.99
  • Manufacturer: ABAKUS
  • EAN number: 221130719406924194069
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
£40. 99

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

Brake caliper A.B.S. 93 173 73194 mm
Article number: 422341
Submit a review
  • Brake System: ATE
  • for brake disc thickness [mm]: 25
  • Paired product: 422342
  • Distance of mounting bores [mm]: 94
  • Item number: 422341
  • Our price: £41.99
  • Manufacturer: A.B.S.
  • EAN number: 8717109070057
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
-69%
compared to RRP £137.95

£41. 99

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

A core charge of £21.85 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
  • Fitting Position: Front Axle Left
  • Brake System: ATE
  • Brake Caliper Type: Brake Caliper (1 piston)
  • Material: Grey Cast Iron
  • for brake disc thickness [mm]: 25
  • Supplementary Article / Supplementary Info: without electric motor
  • Paired product: JBC0122
  • Piston Diameter [mm]: 57
  • Item number: JBC0121
  • Our price: £42.99
  • Manufacturer: KAMOKA
  • EAN number: 2218512870854
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock (Item(s) left: 1)
£42. 99

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

Brake caliper BOSCH 93 173 731Cast Iron, 75 mm
Article number: 0 986 473 056
Reviews - 1
  • Brake System: ATE
  • Brake Caliper Type: Floating Caliper
  • Material: Cast Iron
  • Exchange Part
  • Paired product: 0 986 474 056
  • Inner Width [mm]: 75
  • Article number of recommended accessories: 1 987 470 603
  • Piston Diameter [mm]: 57
  • Item number: 0 986 473 056
  • Our price: £43.49
  • Manufacturer: BOSCH
  • EAN number: 3165143357101
  • Condition: Remanufactured
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock (Item(s) left: 5)
£43. 49

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

A core charge of £32.42 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
Brake caliper NTY 93 173 731Front Axle, Front Axle Left
Article number: HZP-PL-000
Submit a review
  • Fitting Position: Front Axle, Front Axle Left
  • Brake Caliper Type: Brake Caliper (1 piston)
  • Paired product: HZP-PL-001
  • Supplementary Article / Supplementary Info Info 2: without holding frame
  • Rim Size [inch]: 16
  • Rim Size [inch]: 15.0, 16.0
  • Piston Diameter [mm]: 57
  • Fabrication Number: HZP-PL-000
  • Item number: HZP-PL-000
  • Our price: £44.99
  • Manufacturer: NTY
  • EAN number: 5902048028617
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock (Item(s) left: 2)
£44. 99

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

  • Fitting Position: Front Axle Left
  • Brake System: ATE
  • Brake Caliper Type: Fist-type Caliper
  • Material: Cast Iron
  • Exchange Part
  • Weight [kg]: 3,425
  • Supplementary Article / Supplementary Info: without holder
  • Paired product: 9291908
  • Brake Caliper Colour: grey
  • Piston Diameter [mm]: 57
  • Item number: 9291890
  • Our price: £45.49
  • Manufacturer: FTE
  • EAN number: 3276429807873
  • Condition: Remanufactured
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock (Item(s) left: 1)
£45. 49

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

A core charge of £26.01 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
  • Fitting Position: Front Axle Left
  • Brake System: ATE
  • Brake Caliper Type: Fist-type Caliper
  • Material: Cast Iron
  • Weight [kg]: 3,22
  • Supplementary Article / Supplementary Info: without holder
  • Paired product: 9298262
  • Brake Caliper Colour: grey
  • New Part
  • Piston Diameter [mm]: 57
  • Item number: 9298258
  • Our price: £49.49
  • Manufacturer: FTE
  • EAN number: 3276429279472
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
£49. 49

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

  • Brake System: ATE
  • Brake Caliper Type: Fist-type Caliper
  • Material: Cast Iron
  • Exchange Part
  • Weight [kg]: 3,425
  • Supplementary Article / Supplementary Info: without holder
  • Paired product: 38079600
  • Brake Caliper Colour: grey
  • Piston Diameter [mm]: 57
  • Item number: 38077900
  • Our price: £52.99
  • Manufacturer: TEXTAR
  • EAN number: 4019722329739
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock (Item(s) left: 1)
-62%
compared to RRP £142.63

£52. 99

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

A core charge of £26.01 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
Brake caliper FERODO 93 173 731Steel, 76 mm, with accessories
Article number: FCL694287
Submit a review
  • Product line: PREMIER
  • Brake System: ATE
  • Brake Caliper Type: Floating Caliper
  • Material: Steel
  • for brake disc thickness [mm]: 25
  • Weight [kg]: 3,15
  • Supplementary Article / Supplementary Info: with accessories
  • Paired product: FCL694288
  • for brake disc diameter [mm]: 57
  • Thread Size 1: M8X1,25
  • Number of Cylinders: 1
  • Distance of mounting bores [mm]: 76
  • Connecting thread: M10X1,5
  • Piston Diameter 1 [mm]: 57
  • Packing Type: Box
  • Packaging length [cm]: 19,5
  • Packaging width [cm]: 15,3
  • Packaging height [cm]: 12
  • Item number: FCL694287
  • Our price: £53.49
  • Manufacturer: FERODO
  • EAN number: 4044197822720
  • Condition: Remanufactured
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
£53. 49

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

A core charge of £15.15 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
Brake caliper ATE 93 173 731without holder
Article number: 24.3571-9823.5
Reviews - 4
  • Brake System: ATE
  • Brake Caliper Type: Fist-type Caliper
  • Exchange Part
  • Supplementary Article / Supplementary Info: without holder
  • Paired product: 24.3571-9824.5
  • MAPP code available
  • Article number of recommended accessories: 11.0101-5407.2, 11.0441-5704.2, 11.8116-0292.1, 11.8171-0008.1
  • Piston Diameter [mm]: 57
  • Observe dimensions
  • Item number: 24.3571-9823.5
  • Our price: £54.49
  • Manufacturer: ATE
  • EAN number: 4006633347556
  • Condition: Remanufactured
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
-44%
compared to RRP £98.93

£54. 49

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

A core charge of £15.60 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
Brake caliper MAPCO 93 173 731Front Axle Left
Article number: 4682
Submit a review
  • Fitting Position: Front Axle Left
  • Brake System: ATE
  • Paired product: 4683
  • Used part return not required
  • New part without deposit
  • Piston Diameter [mm]: 57
  • Item number: 4682
  • Our price: £54.99
  • Manufacturer: MAPCO
  • EAN number: 4043605791139
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
-68%
compared to RRP £174.73

£54. 99

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

  • Fitting Position: Front Axle Left
  • Brake System: ATE
  • Brake Caliper Type: Brake Caliper (1 piston)
  • Brake Disc Thickness: 25
  • Weight [kg]: 3,41
  • Paired product: 23SKV056
  • New Part
  • Distance of mounting bores [mm]: 94
  • Used part return not required
  • Brake Caliper Piston Diameter [mm]: 57
  • Always compare old and new part (in particular OE No.)
  • alternative item: 78SKV531
  • Item number: 23SKV055
  • Our price: £56.49
  • Manufacturer: ESEN SKV
  • EAN number: 5901947348734
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock (Item(s) left: 1)
£56. 49

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

  • Fitting Position: in front of axle, Front Axle Left
  • Product line: Essential
  • Brake System: ATE
  • Brake Caliper Type: Brake Caliper (1 piston)
  • Material: Grey Cast Iron
  • Brake Disc Thickness: 25
  • Paired product: F 59 095
  • for brake disc diameter [mm]: 280, 308, 288
  • Piston Diameter [mm]: 57
  • Item number: F 59 094
  • Our price: £62.99
  • Manufacturer: BREMBO
  • EAN number: 8020584521038
  • Condition: Remanufactured
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock (Item(s) left: 6)
£62. 99

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

A core charge of £21.85 (incl. 20% VAT) is NOT included in the price and will be refunded to the customer when the old part is returned
Brake caliper HELLA 93 173 731Grey Cast Iron, without holder
Article number: 8AN 355 791-391
Submit a review
  • Brake System: ATE
  • Brake Caliper Type: Fist-type Caliper
  • Material: Grey Cast Iron
  • Supplementary Article / Supplementary Info: without holder
  • Paired product: 8AN 355 791-401
  • Bore Diameter [mm]: 57
  • Technical Information Number: AN9139
  • Used part return not required
  • New part without deposit
  • Item number: 8AN 355 791-391
  • Our price: £72.99
  • Manufacturer: HELLA
  • EAN number: 4082300855975
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
-51%
compared to RRP £150.35

£72. 99

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

Brake caliper STARK 93 173 731Front Axle, 94 mm
Article number: SKBC-0461734
Reviews - 3
  • Fitting Position: Front Axle
  • Brake Caliper Type: Floating Caliper, Brake Caliper (1 piston), Fist-type Caliper
  • for brake disc thickness [mm]: 25,0
  • Diameter 1 [mm]: 57
  • for brake disc diameter [mm]: 280,0, 288,0, 308,0
  • Brake Disc Type: Vented
  • Supplementary Article / Supplementary Info Info 2: without holding frame
  • Distance of mounting bores [mm]: 94
  • Quantity Unit: Set
  • Item number: SKBC-0461734
  • Our price: £75.98
  • Manufacturer: STARK
  • EAN number: 4066016896200
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Contents of the Brake caliper STARK set:
Description of the product
Units
Article number
1
SKBC-0460234
1
SKBC-0460240
Details
In stock
-35%
compared to RRP £118.30

£75. 98
(Price per set)

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

  • Fitting Position: Front Axle Left, Front Axle
  • Brake Caliper Type: Floating Caliper, Brake Caliper (1 piston)
  • Material: Cast Iron
  • for brake disc thickness [mm]: 25
  • for brake disc diameter [mm]: 280, 288, 308
  • Brake Disc Type: Vented
  • Distance of mounting bores [mm]: 94
  • Piston Diameter [mm]: 57
  • Net weight [kg]: 3,2
  • Item number: GCG80236
  • Our price: £293.50
  • Manufacturer: goCORE
  • EAN number: 4067448454938
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
Get a bonus of £3.33 when you purchase this product
You will receive £3.33 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
£293. 50

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

  • Fitting Position: Front Axle
  • Supplementary Article / Supplementary Info Info 2: for reverse camera
  • Diameter: 57
  • Item number: SKRK-0730097
  • Manufacturer: STARK
  • EAN number: 4059191609420
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Contents of the Repair Kit, brake caliper STARK set:
Description of the product
Units
Article number
1
SKPBC-1660017
Details
In stock
£12. 28
Price per set of 1 pieces

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

  • Fitting Position: Front Axle
  • Diameter: 57
  • for OE number: 8E0615124A
  • Item number: R-Z0252
  • Manufacturer: RAP BRAKES
  • EAN number: 5906125668444
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
£14. 49
£28.98 / Price per 2 items

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

  • Fitting Position: Front Axle
  • Supplementary Article / Supplementary Info Info 2: for reverse camera
  • Diameter: 57
  • Brake System: ATE
  • for OE number: 4A0615123
  • Item number: 27-0454
  • Manufacturer: MAXGEAR
  • EAN number: 5902659719416
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Contents of the Repair Kit, brake caliper MAXGEAR set:
Description of the product
Units
Article number
Details
In stock
£14. 99
£29.98 / Price per 2 items

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

KRAFT 6030449 Sample photo only
6030449 Brake caliper KRAFT 93173731 AUDI
  • Fitting Position: Front Axle
  • Diameter: 57
  • Brake System: ATE, Ate.
  • Production Number: K6030449
  • Item number: 6030449
  • Manufacturer: KRAFT
  • EAN number: 5901159273015
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock
£15. 49
£30.98 / Price per 2 items

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

  • Fitting Position: Front Axle
  • Diameter: 57
  • Brake System: ATE
  • Full Set
  • for OE number: 4A0615123
  • Item number: D41074C
  • Manufacturer: AUTOFREN SEINSA
  • EAN number: 8430320085074
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Contents of the Repair Kit, brake caliper AUTOFREN SEINSA set:
Description of the product
Units
Article number
Details
In stock
£18. 99
£37.98 / Price per 2 items

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

  • Fitting Position: Front Axle
  • Diameter: 57
  • Brake System: ATE (Teves), TRW
  • Version: Kit+Piston+GuidePins
  • Full Set
  • Item number: 757482
  • Manufacturer: FRENKIT
  • EAN number: 221067618476670184766
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
In stock (Item(s) left: 6)
£27. 49
£54.98 / Price per 2 items

price incl. 20% VAT

excl. delivery costs

Sold by AUTODOC

Brake caliper Advantage Auto Parts 93 173 731Left Front
Article number: 82-0441
Submit a review
  • Fitting Position: Left Front
  • Brake System: ATE
  • Diameter: 308
  • Brake Caliper Type: Fixed Caliper
  • for brake disc thickness [mm]: 25
  • Brake Disc Type: Vented
  • Brake Caliper Piston Diameter [mm]: 57
  • Item number: 82-0441
  • Our price: £28.90
  • Manufacturer: Advantage Auto Parts
  • Condition: New
  • Reference number OEM: 93173731
Show OEM numbers of the product
Details
Free delivery on this item
£28. 90

price incl. 20% VAT

free delivery

Sold by Advantage Auto Parts

The best offers: