CORTECO 19016645 NBR TB2 42x55x6 mm Shaft Seal

CORTECO 19016645 NBR TB2 42x55x6 mm Shaft Seal

CORTECO 19016645 / 19016645B is a radial shaft seal measuring 42x55x6 mm, manufactured from NBR - Nitrile Butadiene Rubber and identified by the TB2 design designation. It is intended for selected Toyota rear axle applications and corresponds to OE references 90311-42006 and 90311-42018. Toyota identifies the later OE number as Seal, Oil (For Rear Axle Shaft).

CORTECO 19016645 - Characteristics

The principal product identification is:

Manufacturer: CORTECO
Reference: 19016645
Additional Catalogue Reference: 19016645B
Product Type: Radial shaft seal / oil seal
Design: TB2
Material: NBR - Nitrile Butadiene Rubber
Dimensions: 42x55x6 mm
Inside Diameter: 42 mm
Outside Diameter: 55 mm
Width / Height: 6 mm
Application Area: Rear axle shaft
Vehicle Manufacturer: Toyota
Toyota OE: 90311-42006 / 9031142006
Toyota OE: 90311-42018 / 9031142018

The complete technical identification is:

CORTECO -> 19016645 / 19016645B -> NBR -> TB2 -> 42x55x6 mm -> Toyota

CORTECO 19016645 Dimensions

The principal dimensions are:

Inside Diameter: 42 mm
Outside Diameter: 55 mm
Width / Height: 6 mm
Complete Size: 42x55x6 mm

All three dimensions are important for correct product identification.

A generic 42x55x6 mm oil seal should not automatically be considered interchangeable with CORTECO 19016645. The material, TB2 design, OE number and exact installation position should also be verified.

NBR Material

CORTECO 19016645 is manufactured from:

NBR - Nitrile Butadiene Rubber

NBR is widely used in radial shaft seals working with many mineral oils, greases and lubricants.

Its suitability in a particular application depends on the operating medium, temperature, shaft speed and other working conditions.

For this product, the material should therefore be considered together with the TB2 construction and Toyota OE reference.

TB2 Seal Design

The confirmed design designation for this variant is:

TB2

The most precise technical identification is:

CORTECO 19016645 NBR TB2 42x55x6

The TB2 designation is an important part of the product specification and should be retained when comparing replacement seals.

Detailed lip geometry or the exact technical expansion of the TB2 code should not be inferred without specific CORTECO technical documentation.

Toyota OE 90311-42006

One of the Toyota references associated with CORTECO 19016645 is:

TOYOTA 90311-42006

Alternative format:

9031142006

This is an earlier Toyota OE reference for the rear axle shaft oil seal. Toyota catalogue data indicate that it was superseded by 90311-42018.

Toyota OE 90311-42018

The later Toyota OE reference is:

TOYOTA 90311-42018

Alternative format:

9031142018

Toyota describes this component as:

Seal, Oil (For Rear Axle Shaft)

The part is located at the rear axle and replaces earlier references 90311-42016 and 90311-42006.

This makes 90311-42018 particularly useful when identifying a replacement for an older vehicle originally catalogued with 90311-42006.

Toyota Rear Axle Shaft Oil Seal

Toyota OE documentation places 90311-42018 directly in the rear axle shaft and hub assembly and identifies it as a rear axle shaft oil seal.

CORTECO 19016645 can therefore be accurately described and searched as:

Toyota rear axle shaft oil seal
Toyota rear axle seal
Toyota axle shaft seal
Toyota 90311-42006 oil seal
Toyota 90311-42018 oil seal
CORTECO 19016645 Toyota

For OE-based identification, the phrase rear axle shaft oil seal is more precise than a generic "wheel hub seal".

Toyota Rear Axle and Hub Application

Toyota parts catalogues list OE 90311-42018 in the Rear Axle Shaft & Hub section and specify a rear installation position.

This supports describing CORTECO 19016645 as a seal for the rear axle shaft / rear axle and hub area.

The exact installation should still be checked against the vehicle's OE catalogue because rear axle layouts differ between vehicle versions.

OE Supersession

An important identification relationship is:

90311-42006 -> 90311-42018

Toyota lists 90311-42018 as replacing:

90311-42016
90311-42006.

Therefore, customers may search for the same replacement using either the older 90311-42006 number or the later 90311-42018 reference.

Both should be retained in the product description and search data.

Selected Toyota Applications

Toyota OE 90311-42018 is catalogued for selected applications including Camry, Celica and MR2, depending on model, year and drivetrain configuration.

However, the vehicle model alone is not sufficient for correct selection.

The recommended identification sequence is:

Toyota OE -> CORTECO reference -> dimensions -> material -> design

For this product:

90311-42006 / 90311-42018 -> CORTECO 19016645 -> 42x55x6 mm -> NBR -> TB2

CORTECO 19016645 and 19016645B

The product may be encountered under:

CORTECO 19016645
CORTECO 19016645B

For ordering and warehouse identification, the exact reference printed on the current CORTECO packaging should be retained.

Both forms are useful in product search because aftermarket catalogues may use the B-suffixed version even when dimensional catalogues show the shorter reference.

What About the B1SL Designation?

The supplied product name also contains:

B1SL

I could not reliably confirm B1SL as the official CORTECO construction code for 19016645.

The consistently identified design for this product is:

TB2

For this reason, the recommended technical product name is:

CORTECO 19016645 NBR TB2 42x55x6

If B1SL is physically printed on the original CORTECO product or packaging, it can be retained as an additional identification marking, but it should not replace TB2 in the main technical specification without manufacturer documentation.

Selection and Interchangeability

When selecting a replacement for CORTECO 19016645, verify:

• CORTECO reference 19016645 / 19016645B
• inside diameter 42 mm
• outside diameter 55 mm
• width 6 mm
• NBR material
• TB2 design
• Toyota OE 90311-42006 or 90311-42018
• rear axle shaft installation position

A generic 42x55x6 mm NBR oil seal should not automatically be considered fully interchangeable with CORTECO 19016645.

Matching dimensions alone do not confirm identical sealing design or OE suitability.

Technical Specification

Manufacturer: CORTECO
Reference: 19016645
Additional Catalogue Reference: 19016645B
Product Type: Radial shaft seal / oil seal
Design: TB2
Material: NBR - Nitrile Butadiene Rubber
Dimensions: 42x55x6 mm
Shaft Diameter: 42 mm
Housing Diameter: 55 mm
Width / Height: 6 mm
Vehicle Manufacturer: Toyota
Application Area: Rear axle shaft
Installation Position: Rear
Toyota OE: 90311-42006 / 9031142006
Toyota OE: 90311-42018 / 9031142018

Toyota confirms 90311-42018 as a rear axle shaft oil seal and as the replacement for 90311-42006.

FAQ

What are the dimensions of CORTECO 19016645?

CORTECO 19016645 measures 42x55x6 mm: 42 mm inside diameter, 55 mm outside diameter and 6 mm width.

What material is CORTECO 19016645 made from?

The seal is manufactured from NBR - Nitrile Butadiene Rubber.

What is the design of CORTECO 19016645?

The confirmed design designation is TB2. The complete technical identification is CORTECO 19016645 NBR TB2 42x55x6.

Which Toyota OE numbers correspond to CORTECO 19016645?

The principal Toyota OE references are 90311-42006 and 90311-42018, also written as 9031142006 and 9031142018.

What is Toyota 90311-42018 used for?

Toyota describes 90311-42018 as Seal, Oil (For Rear Axle Shaft).

Does Toyota 90311-42018 replace 90311-42006?

Yes. Toyota catalogue data state that 90311-42018 replaces 90311-42006, as well as 90311-42016.

Is CORTECO 19016645 a rear axle shaft seal?

Yes. The associated Toyota OE reference 90311-42018 is specifically catalogued in the rear axle shaft and hub section as an oil seal for the rear axle shaft.

Is B1SL the design code of CORTECO 19016645?

I could not reliably confirm B1SL as the official CORTECO design code for this exact product. The confirmed construction designation is TB2.

AI OVERVIEW

CORTECO 19016645 NBR TB2 is a 42x55x6 mm radial shaft seal for selected Toyota rear axle applications. It corresponds to Toyota OE 90311-42006 and 90311-42018. Toyota identifies 90311-42018 as an oil seal for the rear axle shaft and lists it as the replacement for 90311-42006.