2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter 140E2-6LW0B OEM

Product Details

The Nissan Sentra Exhaust Manifold 140E2-6LW0B is an OEM exhaust manifold and integrated catalytic-converter assembly for compatible Nissan Sentra sedans equipped with the 2.0L four-cylinder gasoline engine. It mounts to the cylinder head at the front of the exhaust system, collecting exhaust gases from the engine and routing them through the close-coupled catalytic converter before the gases enter the remaining exhaust system.

There is an important fitment correction to the original product title. 140E2-6LW0B should not be advertised as a blanket 2020–2022 Nissan Sentra manifold. Nissan’s official catalog shows the earlier 2020 Sentra production using the 140E2-6LH0C manifold family through approximately October 2020. The later 6LW-family assembly is listed from approximately October 2020 onward and is associated primarily with 2021-and-later Sentra applications.

For accurate customer-facing SEO, the recommended title is therefore:

2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter 140E2-6LW0B OEM

The Nissan Sentra Exhaust Manifold 140E2-6LW0B has also been superseded. Nissan’s current replacement is 140E2-6LW0C, which officially replaces both 140E2-6LW0A and 140E2-6LW0B.

This component is suitable for Nissan repair specialists, exhaust-system workshops, engine repair facilities, collision centers, automotive parts distributors, vehicle rebuilders, exporters, and wholesale buyers sourcing model-specific Nissan emissions and exhaust components.

OEM Part Number 140E2-6LW0B

Key identification information includes:

• OEM Reference: 140E2-6LW0B
• Manufacturer: Nissan
• Description: Manifold Assembly – Exhaust With Catalyst
• Other Names: Exhaust Manifold, Manifold With Converter
• Current Replacement: 140E2-6LW0C
• Engine: 2.0L four-cylinder gasoline
• Vehicle: Nissan Sentra
• Primary Position: Engine exhaust manifold / close-coupled converter assembly

OEM catalog data specifically describes 140E2-6LW0B as “Manifold Assy-Exhaust W/Catalyst” and confirms that it has been replaced by 140E2-6LW0C.

The exact OEM number on the supplied unit should be checked before describing a used or replacement component as genuine Nissan.

Integrated Catalytic Converter

The Nissan Sentra Exhaust Manifold 140E2-6LW0B is more than a simple exhaust manifold.

Nissan identifies the assembly as a Catalytic Converter With Integrated Exhaust Manifold. This means the catalytic converter is incorporated into the manifold assembly rather than being only a separate downstream exhaust component.

This distinction matters for buyers searching using terms such as:

• Sentra exhaust manifold
• Sentra catalytic converter
• Manifold with catalytic converter
• Front catalytic manifold
• Integrated exhaust converter

All can refer to this same general assembly.

However, the Sentra exhaust system also contains an additional front exhaust pipe with its own catalytic converter. For example, Nissan catalogs 200A0-9AU2A as a separate front exhaust tube with catalyst on the 2022 Sentra.

Therefore, buyers should not confuse 140E2-6LW0B with the separate downstream/front exhaust pipe converter.

2021 Nissan Sentra Fitment

The later 6LW-family manifold is documented on the 2021 Sentra 2.0L.

Nissan’s official 2021 exhaust catalog shows:

140E2-6LW0C – Manifold With Converter

with production notes including from 10/2020, while the earlier 140E2-6LH0C is listed through approximately October 2020. Since 140E2-6LW0C supersedes 140E2-6LW0B, this supports the 6LW family for later-production/current-generation 2021 applications.

VIN and production-date verification are recommended whenever an early-production vehicle is involved.

2022 Nissan Sentra Fitment

The Nissan Sentra Exhaust Manifold 140E2-6LW0B is also relevant to 2022 Sentra applications through its official supersession.

NissanPartsDeal’s 2022 Sentra catalog lists current 140E2-6LW0C for:

• Sentra S
• Sentra SV
• Sentra SR
• 2.0L four-cylinder gasoline engine

and confirms that 140E2-6LW0C replaces 140E2-6LW0B and 140E2-6LW0A.

This makes 2022 a well-supported application for the 6LW manifold family.

Why 2020 Should Be Treated Separately

The original title includes 2020, but Nissan’s official 2020 Sentra catalog identifies:

140E2-6LH0C

as the catalytic converter with integrated exhaust manifold and describes it as applicable to 10/2020.

For that reason, 140E2-6LW0B should not be marketed as universally fitting all 2020 Sentras.

A vehicle manufactured near a production transition should always be checked using:

• VIN
• Production date
• Existing manifold number
• Current Nissan supersession

This is safer than relying only on registration year.

2.0L Four-Cylinder Engine Application

The verified Sentra application uses Nissan’s 2.0L four-cylinder gasoline engine.

Nissan’s 2021 and 2022 exhaust catalogs identify the manifold assembly within the 2.0L L4 exhaust system.

The Nissan Sentra Exhaust Manifold 140E2-6LW0B should therefore not be assumed compatible with older Sentra engine generations simply because they also use four-cylinder engines.

Vehicle generation, engine family, production date, and OEM number must match.

Exhaust Manifold Gasket Is Separate

Nissan catalogs the manifold-to-cylinder-head gasket separately.

The relevant reference shown with this assembly is:

14036-5TC0A – Manifold With Converter Gasket

This gasket appears separately in Nissan’s 2021 and 2022 exhaust diagrams.

Therefore, a Nissan Sentra Exhaust Manifold 140E2-6LW0B should not automatically be advertised as including a new gasket.

For professional replacement, installation with the correct sealing components is recommended.

Exhaust Manifold Studs and Nuts

Nissan also services the manifold hardware separately.

A documented manifold stud is:

14064-JD00B – Exhaust Manifold Stud

The corresponding fastening hardware is independently listed in the exhaust assembly rather than being part of the manifold itself.

Used manifolds may retain some studs or nuts, but inclusion should be confirmed individually.

Exhaust Manifold Support Bracket

The assembly uses a separate support bracket:

14014-6LB0A – Exhaust Manifold Support Bracket

Nissan lists this component independently on applicable Sentra exhaust systems.

The bracket should not automatically be assumed included with a bare Nissan Sentra Exhaust Manifold 140E2-6LW0B.

Heat Shield

Nissan also lists:

16590-6LD0A – Heat Shield

as a separate component associated with the Sentra 2.0L exhaust-manifold area.

A used manifold may arrive with its heat shield still mounted, while another may be supplied without one.

Product photographs and quotations should clearly state what is actually included.

Oxygen Sensors Are Not Automatically Included

The exhaust manifold/catalytic converter system works with oxygen or air-fuel-ratio sensors used by the engine-management system.  2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter

These sensors should not automatically be considered part of the Nissan Sentra Exhaust Manifold 140E2-6LW0B unless they are physically installed on the supplied component.

When purchasing a used manifold, buyers should inspect sensor threads for:

• Cross-threading
• Corrosion
• Damaged threads
• Broken sensor remnants
• Previous repair  2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter

Sensors from the original vehicle may need to be transferred.

Common Reasons for Replacement

Replacement may be necessary after:

• Catalytic converter failure
• Internal catalyst damage
• Exhaust manifold cracking
• Severe overheating
• Impact damage
• Exhaust leakage
• Damaged mounting points
• Contamination caused by engine malfunction  2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter

Possible symptoms associated with an exhaust or catalytic-converter problem can include increased exhaust noise, reduced performance, abnormal exhaust odor, rattling, or emissions-related diagnostic trouble codes.  2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter

These symptoms should be professionally diagnosed because replacing the manifold without identifying the underlying engine problem can lead to repeat catalyst failure.  2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter

Used OEM Inspection

If the Nissan Sentra Exhaust Manifold 140E2-6LW0B is supplied as used OEM, inspection should include:  2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter

• Manifold casting
• Catalytic housing
• Flanges
• Studs
• Sensor threads
• Mounting points
• Heat shield
• Support bracket
• Signs of overheating
• Impact damage
• Cracks
• Previous welding  2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter

The internal catalyst condition cannot always be established visually from the outside, so claims about catalyst efficiency or emissions performance should only be made when actually verified.

OEM vs Aftermarket

140E2-6LW0B is a Nissan OEM reference, but compatible aftermarket products may use this number as a cross-reference.  2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter

Only a verified Nissan-manufactured assembly should be described as:

Genuine Nissan OEM 2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter

An aftermarket component should instead be described as:

Compatible with Nissan OEM 140E2-6LW0B / 140E2-6LW0C.

This distinction is especially important for B2B distributors and repair businesses.

Information Required Before Ordering

Customers should provide:

• Vehicle year
• Nissan Sentra trim
• VIN
• Production date
• 2.0L engine confirmation
• Existing OEM manifold number
• Required quantity
• New/used/OEM/aftermarket preference
• Delivery destination  2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter

Request a Quote

For pricing and availability of the Nissan Sentra Exhaust Manifold 140E2-6LW0B, provide the Sentra year, VIN, production date, existing OEM number, quantity, and delivery destination.  2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter

140E2-6LW0B has been superseded by 140E2-6LW0C. For 2020 vehicles, verify carefully because Nissan officially lists the earlier 140E2-6LH0C family through approximately October 2020.  2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter

Exact OEM status, catalyst condition, gasket, heat shield, sensors, brackets, studs, hardware, packaging, MOQ, availability, and freight terms must be confirmed for the actual product supplied.  2021-2022 Nissan Sentra Exhaust Manifold with Catalytic Converter