Catalogue

Expand all | Collapse all | Show hidden lines

  • Banner

MOBILETRON OS-B4176P Lambda Sensor

OS-B4176P
£0.00
Tax included
Quantity
Out-of-Stock

  Security policy

(edit with the Customer Reassurance module)

  Delivery policy

(edit with the Customer Reassurance module)

  Return policy

(edit with the Customer Reassurance module)

Manufacturer Model Engine Engine info Years Note
BMW 1 (E87) 116 i 1596 ccm, 85 kw, 115 hp 2004 - 2011 Engine Code : N45B16A, Exhaust System : Post-catalyst, for OE number : 11787569968
BMW 1 (E87) 116 i 1599 ccm, 90 kw, 122 hp 2007 - 2011 Engine Code : N43B16A, Exhaust System : Post-catalyst, for OE number : 11787569968
BMW 1 (E87) 116 i 1995 ccm, 90 kw, 122 hp 2009 - 2011 Engine Code : N43B20A, Exhaust System : Post-catalyst, for OE number : 11787569968
BMW 1 (E87) 118 i 1995 ccm, 95 kw, 129 hp 2004 - 2007 Engine Code : N46B20B, Exhaust System : Post-catalyst, for OE number : 11787569968
BMW 1 (E87) 118 i 1995 ccm, 105 kw, 143 hp 2006 - 2011 Engine Code : N43B20A, Exhaust System : Post-catalyst, for OE number : 11787569968
BMW 1 (E87) 118 i 1995 ccm, 125 kw, 170 hp 2007 - 2007 Engine Code : N43B20A, Exhaust System : Post-catalyst, for OE number : 11787569968
BMW 1 (E87) 120 i 1995 ccm, 115 kw, 156 hp 2007 - 2011 Engine Code : N46B20B, Engine Code : N46B20BD, Engine Code : N46B20C, Engine Code : N46B20CC, Exhaust System : Post-catalyst, for cylinder : 1, for cylinder : 4, for OE number : 11787545243, for OE number : 11787569968, Transmission Type : Automatic Transmission, Transmission Type : Manual Transmission
BMW 1 (E87) 120 i 1995 ccm, 120 kw, 163 hp 2007 - 2011 Engine Code : N43B20A, Exhaust System : Post-catalyst, for OE number : 11787569968
BMW 1 (E87) 120 i 1995 ccm, 125 kw, 170 hp 2007 - 2011 Engine Code : N43B20A, Exhaust System : Post-catalyst, for OE number : 11787569968
BMW 1 (E87) 130 i 2996 ccm, 190 kw, 258 hp 2007 - 2011 Engine Code : N52B30A, Engine Code : N52B30AF, Engine Code : N52B30B, Engine Code : N52B30BF, Exhaust System : Post-catalyst, for cylinder : 1, for cylinder : 2, for cylinder : 3, for OE number : 11787545074
BMW 1 (E87) 130 i 2996 ccm, 195 kw, 265 hp 2005 - 2007 Engine Code : N52B30A, Engine Code : N52B30AF, Engine Code : N52B30B, Engine Code : N52B30BF, Exhaust System : Post-catalyst, for cylinder : 1, for cylinder : 2, for cylinder : 3, for OE number : 11787545074
BMW 5 Touring (E61) 530 i 2996 ccm, 200 kw, 272 hp 2007 - 2010 Engine Code : N53B30A, Exhaust System : Post-catalyst, for cylinder : 1, for cylinder : 2, for cylinder : 3
Product Details
MOBILETRON
OS-B4176P
New product

Data sheet

Number of Poles
4
Cable Length [mm]
600
Length [in]
23,62
Available as universal article as well, see article no.
OS-08P
New product
100 other products in the same category:

Reference: OS-B503

Brand: MOBILETRON

MOBILETRON OS-B503 Lambda Sensor

Number of Poles : 6, Length [mm] : 400, Length ...

(0)

Price £0.00
More
Out-of-Stock

Reference: OS-B4159P

Brand: MOBILETRON

MOBILETRON OS-B4159P Lambda Sensor

Number of Poles : 4, Cable Length [mm] : 560, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 64267

Brand: INTERMOTOR

INTERMOTOR 64267 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 7.05270.06.0

Brand: PIERBURG

PIERBURG 7.05270.06.0 Lambda Sensor

Voltage [V] : 12, Cable Length [mm] : 630, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 181826

Brand: HC-Cargo

HC-Cargo 181826 Lambda Sensor

Thread Size : M18-1.5, Cable Length [mm] : ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 007 032

Brand: BOSCH

BOSCH 0 258 007 032 Lambda Sensor

Overall Length [mm] : 1000, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: A2C59513241Z

Brand: VDO

VDO A2C59513241Z Lambda Sensor

Length [mm] : 620, Number of circuits : 4

(0)

Price £0.00
More
Out-of-Stock

Reference: OO-SZ02

Brand: JAPANPARTS

JAPANPARTS OO-SZ02 Lambda Sensor

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 005 941

Brand: BOSCH

BOSCH 0 258 005 941 Lambda Sensor

Overall Length [mm] : 755, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: ADG070127

Brand: BLUE PRINT

BLUE PRINT ADG070127 Lambda Sensor

Cable Length [mm] : 195, Fitting Position : ...

(0)

Price £0.00
More
Out-of-Stock

Reference: OZH005

Brand: Beru By Driv

BERU by DRiV OZH005 Lambda Sensor

Thread Size : M 18x1,5, Cable Length [mm] : ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 281 004 496

Brand: BOSCH

BOSCH 0 281 004 496 Lambda Sensor

Overall Length [mm] : 760, Number of circuits : 5

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 010 110

Brand: BOSCH

BOSCH 0 258 010 110 Lambda Sensor

Overall Length [mm] : 420, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 005 701

Brand: BOSCH

BOSCH 0 258 005 701 Lambda Sensor

Overall Length [mm] : 410, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LLB789

Brand: LEMARK

LEMARK LLB789 Lambda Sensor

Number of Poles : 6, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 001 004

Brand: BOSCH

BOSCH 0 258 001 004 Lambda Sensor

Recommended replace interval [km] : 50000

(0)

Price £0.00
More
Out-of-Stock

Reference: LEB486

Brand: LUCAS ELECTRICAL

LUCAS ELECTRICAL LEB486 Lambda Sensor

Number of Poles : 4, Cable Length [mm] : 1680

(0)

Price £0.00
More
Out-of-Stock

Reference: DOX-1171

Brand: DENSO

DENSO DOX-1171 Lambda Sensor

Number of Poles : 4, Thread Size : M18x1.5, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 003 749

Brand: BOSCH

BOSCH 0 258 003 749 Lambda Sensor

Overall Length [mm] : 1005, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LEB485

Brand: LUCAS ELECTRICAL

LUCAS ELECTRICAL LEB485 Lambda Sensor

Number of Poles : 4, Cable Length [mm] : 1050

(0)

Price £0.00
More
Out-of-Stock

Reference: 64723

Brand: INTERMOTOR

INTERMOTOR 64723 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: OS-T476P

Brand: MOBILETRON

MOBILETRON OS-T476P Lambda Sensor

Number of Poles : 4, Length [mm] : 390, Length ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 7.05271.59.0

Brand: PIERBURG

PIERBURG 7.05271.59.0 Lambda Sensor

Voltage [V] : 12, Cable Length [mm] : 350, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 19657

Brand: OSSCA

OSSCA 19657 Lambda Sensor

Number of Poles : 5, Length [mm] : 680

(0)

Price £0.00
More
Out-of-Stock

Reference: 65006

Brand: INTERMOTOR

INTERMOTOR 65006 Lambda Sensor

Number of Poles : 6, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 10.7101

Brand: FACET

FACET 10.7101 Lambda Sensor

Cable Length [mm] : 450, Conductor Number : 4

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 007 177

Brand: BOSCH

BOSCH 0 258 007 177 Lambda Sensor

Overall Length [mm] : 320, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LEB5274

Brand: LUCAS

LUCAS LEB5274 Lambda Sensor

Number of Poles : 6, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 003 086

Brand: BOSCH

BOSCH 0 258 003 086 Lambda Sensor

Overall Length [mm] : 400, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LLB500

Brand: LEMARK

LEMARK LLB500 Lambda Sensor

Number of Poles : 6, Manufacturer Restriction ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 7.02604.75.0

Brand: PIERBURG

PIERBURG 7.02604.75.0 Lambda Sensor

Voltage [V] : 12, Cable Length [mm] : 575, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 10.8246

Brand: FACET

FACET 10.8246 Lambda Sensor

Cable Length [mm] : 570, Supplementary ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 07787

Brand: OSSCA

OSSCA 07787 Lambda Sensor

(0)

Price £0.00
More
Out-of-Stock

Reference: 64885

Brand: INTERMOTOR

INTERMOTOR 64885 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,094, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: F 00H L00 078

Brand: BOSCH

BOSCH F 00H L00 078 Lambda Sensor

Overall Length [mm] : 905, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 64522

Brand: INTERMOTOR

INTERMOTOR 64522 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 010 107

Brand: BOSCH

BOSCH 0 258 010 107 Lambda Sensor

Overall Length [mm] : 488, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 986 785

Brand: BOSCH

BOSCH 0 258 986 785 Lambda Sensor

(0)

Price £0.00
More
Out-of-Stock

Reference: LEB487

Brand: LUCAS ELECTRICAL

LUCAS ELECTRICAL LEB487 Lambda Sensor

Number of Poles : 4, Cable Length [mm] : 1110

(0)

Price £0.00
More
Out-of-Stock

Reference: 64601

Brand: INTERMOTOR

INTERMOTOR 64601 Lambda Sensor

Number of Poles : 4, Cable Length [mm] : 445, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: DOX-1157

Brand: DENSO

DENSO DOX-1157 Lambda Sensor

Number of Poles : 4, Thread Size : M18x1.5, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: F 00E 263 078

Brand: BOSCH

BOSCH F 00E 263 078 Lambda Sensor

Overall Length [mm] : 530, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LEB923

Brand: LUCAS ELECTRICAL

LUCAS ELECTRICAL LEB923 Lambda Sensor

Number of Poles : 5, Cable Length [mm] : 220

(0)

Price £0.00
More
Out-of-Stock

Reference: A2C59513306Z

Brand: VDO

VDO A2C59513306Z Lambda Sensor

Length [mm] : 1165, Number of circuits : 4

(0)

Price £0.00
More
Out-of-Stock

Reference: LLB973

Brand: LEMARK

LEMARK LLB973 Lambda Sensor

Number of Poles : 4, Connector Shape : ...

(0)

Price £0.00
More
Out-of-Stock

Reference: OZH099

Brand: Beru By Driv

BERU by DRiV OZH099 Lambda Sensor

Thread Size : M 18x1,5, Cable Length [mm] : ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 10.7223

Brand: FACET

FACET 10.7223 Lambda Sensor

Cable Length [mm] : 1500, Conductor Number : 4

(0)

Price £0.00
More
Out-of-Stock

Reference: DOX-0624

Brand: DENSO

DENSO DOX-0624 Lambda Sensor

Number of Poles : 4, Thread Size : M18x1.5, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LEB5442

Brand: LUCAS

LUCAS LEB5442 Lambda Sensor

Number of Poles : 6, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LEB770

Brand: LUCAS

LUCAS LEB770 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: OZH036

Brand: Beru By Driv

BERU by DRiV OZH036 Lambda Sensor

Thread Size : M 18x1,5, Cable Length [mm] : ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LEB729

Brand: LUCAS

LUCAS LEB729 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: OS-B4217P

Brand: MOBILETRON

MOBILETRON OS-B4217P Lambda Sensor

Number of Poles : 4, Cable Length [mm] : 610, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 030 306

Brand: BOSCH

BOSCH 0 258 030 306 Lambda Sensor

(0)

Price £0.00
More
Out-of-Stock

Reference: OS-F421P

Brand: MOBILETRON

MOBILETRON OS-F421P Lambda Sensor

Number of Poles : 4, Cable Length [mm] : 380, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 21272

Brand: OSSCA

OSSCA 21272 Lambda Sensor

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 030 035

Brand: BOSCH

BOSCH 0 258 030 035 Lambda Sensor

Overall Length [mm] : 584, Number of circuits : 4

(0)

Price £0.00
More
Out-of-Stock

Reference: 40522

Brand: OSSCA

OSSCA 40522 Lambda Sensor

Number of Poles : 4, Height [mm] : 510

(0)

Price £0.00
More
Out-of-Stock

Reference: LEB755

Brand: LUCAS ELECTRICAL

LUCAS ELECTRICAL LEB755 Lambda Sensor

Number of Poles : 4, Cable Length [mm] : 680

(0)

Price £0.00
More
Out-of-Stock

Reference: OS-B431P

Brand: MOBILETRON

MOBILETRON OS-B431P Lambda Sensor

Number of Poles : 4, Cable Length [mm] : 1110, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LLB1013

Brand: LEMARK

LEMARK LLB1013 Lambda Sensor

Number of Poles : 6, Connector Shape : ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 64460

Brand: INTERMOTOR

INTERMOTOR 64460 Lambda Sensor

Number of Poles : 3, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: F 00E 262 838

Brand: BOSCH

BOSCH F 00E 262 838 Lambda Sensor

Overall Length [mm] : 445, Number of circuits : 4

(0)

Price £0.00
More
Out-of-Stock

Reference: LLB194

Brand: LEMARK

LEMARK LLB194 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 006 063

Brand: BOSCH

BOSCH 0 258 006 063 Lambda Sensor

Overall Length [mm] : 345, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 10.8231

Brand: FACET

FACET 10.8231 Lambda Sensor

Cable Length [mm] : 720, Supplementary ...

(0)

Price £0.00
More
Out-of-Stock

Reference: F 00E 260 195

Brand: BOSCH

BOSCH F 00E 260 195 Lambda Sensor

Overall Length [mm] : 268, Number of circuits : 4

(0)

Price £0.00
More
Out-of-Stock

Reference: F 00H L00 329

Brand: BOSCH

BOSCH F 00H L00 329 Lambda Sensor

Overall Length [mm] : 300, Number of circuits : 4

(0)

Price £0.00
More
Out-of-Stock

Reference: ADK87008C

Brand: BLUE PRINT

BLUE PRINT ADK87008C Lambda Sensor

Cable Length [mm] : 260, Number of circuits : 4

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 005 259

Brand: BOSCH

BOSCH 0 258 005 259 Lambda Sensor

Overall Length [mm] : 570, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LLB739

Brand: LEMARK

LEMARK LLB739 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 10.7309

Brand: FACET

FACET 10.7309 Lambda Sensor

Cable Length [mm] : 570, Conductor Number : 4

(0)

Price £0.00
More
Out-of-Stock

Reference: DOX-1170

Brand: DENSO

DENSO DOX-1170 Lambda Sensor

Number of Poles : 4, Thread Size : M18x1.5, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: A2C59513167Z

Brand: VDO

VDO A2C59513167Z Lambda Sensor

Length [mm] : 460, Number of circuits : 1

(0)

Price £0.00
More
Out-of-Stock

Reference: OS-B550

Brand: MOBILETRON

MOBILETRON OS-B550 Lambda Sensor

Number of Poles : 6, Cable Length [mm] : 800, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: OPH074

Brand: Beru By Driv

BERU by DRiV OPH074 Lambda Sensor

Thread Size : M 18x1,5, Cable Length [mm] : ...

(0)

Price £0.00
More
Out-of-Stock

Reference: OS-T405P

Brand: MOBILETRON

MOBILETRON OS-T405P Lambda Sensor

Number of Poles : 4, Cable Length [mm] : 500, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LLB393

Brand: LEMARK

LEMARK LLB393 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: A2C59513173Z

Brand: VDO

VDO A2C59513173Z Lambda Sensor

Length [mm] : 550, Number of circuits : 4

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 010 392

Brand: BOSCH

BOSCH 0 258 010 392 Lambda Sensor

Overall Length [mm] : 780, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 007 204

Brand: BOSCH

BOSCH 0 258 007 204 Lambda Sensor

Overall Length [mm] : 400, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 007 057

Brand: BOSCH

BOSCH 0 258 007 057 Lambda Sensor

Overall Length [mm] : 760, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: DOX-1311

Brand: DENSO

DENSO DOX-1311 Lambda Sensor

Number of Poles : 3, Thread Size : M18x1.5, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 10.8087

Brand: FACET

FACET 10.8087 Lambda Sensor

Cable Length [mm] : 720, Conductor Number : 4

(0)

Price £0.00
More
Out-of-Stock

Reference: F 00E 260 169

Brand: BOSCH

BOSCH F 00E 260 169 Lambda Sensor

(0)

Price £0.00
More
Out-of-Stock

Reference: DOX-0594

Brand: DENSO

DENSO DOX-0594 Lambda Sensor

Number of Poles : 4, Thread Size : M18x1.5, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 49014

Brand: OSSCA

OSSCA 49014 Lambda Sensor

Number of Poles : 4, Cable Length [mm] : 870

(0)

Price £0.00
More
Out-of-Stock

Reference: 05583

Brand: OSSCA

OSSCA 05583 Lambda Sensor

Number of Poles : 4, Length [mm] : 720

(0)

Price £0.00
More
Out-of-Stock

Reference: ADM57041

Brand: BLUE PRINT

BLUE PRINT ADM57041 Lambda Sensor

Cable Length [mm] : 650, Fitting Position : ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 010 449

Brand: BOSCH

BOSCH 0 258 010 449 Lambda Sensor

Overall Length [mm] : 488, Number of circuits ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 0 258 986 502

Brand: BOSCH

BOSCH 0 258 986 502 Lambda Sensor

Connector / Clamp : Connector may need ...

(0)

Price £0.00
More
Out-of-Stock

Reference: DOX-1442

Brand: DENSO

DENSO DOX-1442 Lambda Sensor

Number of Poles : 4, Thread Size : M18x1.5, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LLB655

Brand: LEMARK

LEMARK LLB655 Lambda Sensor

Number of Poles : 3, Connector Shape : OVAL, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LLB288

Brand: LEMARK

LEMARK LLB288 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LEB689

Brand: LUCAS

LUCAS LEB689 Lambda Sensor

Number of Poles : 1, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LEB5451

Brand: LUCAS

LUCAS LEB5451 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LLB1005

Brand: LEMARK

LEMARK LLB1005 Lambda Sensor

Number of Poles : 4, Connector Shape : ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 64820

Brand: INTERMOTOR

INTERMOTOR 64820 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: LEB5410

Brand: LUCAS

LUCAS LEB5410 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,098, ...

(0)

Price £0.00
More
Out-of-Stock

Reference: 64104

Brand: INTERMOTOR

INTERMOTOR 64104 Lambda Sensor

Number of Poles : 4, Net weight [kg] : 0,2, ...

(0)

Price £0.00
More
Out-of-Stock

Follow us on Facebook