BMW E34/E36/E39/E46/E60/E61 M50 M52 M54 Engine Cover Trim Cap – Valve Cover & Fuel Injector Rail Mounting Nut Cover | Replaces Part No. 11121726089

Restore the original factory appearance of your BMW’s engine bay with the BAVMODS® BMW Engine Cover Trim Cap Replacement, designed for select BMW E34, E36, E39, E46, E60, and E61 models equipped with compatible M50, M52, and M54 inline-six engines. This factory-style replacement cap is designed to cover the exposed mounting nuts and bolts securing the engine’s decorative valve cover trim and fuel injector rail cover, helping restore a clean, complete, and original-looking engine compartment.

Over time, BMW engine cover trim caps can become brittle, cracked, discolored, or lost entirely due to repeated engine maintenance, exposure to engine compartment temperatures, and general aging. These small plastic components are frequently removed during routine servicing, including spark plug replacements, valve cover gasket repairs, fuel injector maintenance, and other engine-related work.

When a trim cap becomes damaged or missing, the underlying mounting hardware remains exposed, detracting from the original appearance of the engine compartment. Although these caps do not affect engine performance, they are an important finishing detail for maintaining the factory appearance of your BMW.

Rather than replacing the complete decorative engine cover assembly, this replacement trim cap provides a simple and cost-effective solution for restoring the original mounting hardware covers while retaining your existing engine trim components.

Key Features & Benefits

• Factory-Style Replacement: Designed to restore the original appearance of compatible BMW engine cover mounting points.
• OEM Reference Compatibility: Replaces BMW part number 11121726089.
• Engine Cover Hardware Concealment: Covers exposed mounting nuts and bolts on compatible decorative valve cover and fuel injector rail cover assemblies.
• Original-Style Black Finish: Designed to blend with the surrounding factory engine cover trim.
• Cost-Effective Restoration: Replace individual missing or damaged caps without purchasing an entire engine cover assembly.
• Direct Replacement Design: Intended to fit the corresponding factory-style mounting openings without permanent modifications.
• Simple Installation: Designed for straightforward installation using the existing engine cover mounting locations.
• Ideal for Engine Bay Restoration: Helps restore the clean, complete appearance of an aging or previously serviced BMW engine compartment.
• Multiple Applications: Compatible with select BMW M50, M52, M54, S50, and S52 engine configurations.

Common Reasons for Replacement

BMW’s M50, M52, and M54 inline-six engines feature decorative engine covers that conceal various engine components and provide a clean, organized appearance beneath the hood.

These covers are secured using mounting hardware, with removable plastic caps positioned over the corresponding fasteners.

As vehicles age, these small components may become damaged or go missing for several reasons.

1. Missing Engine Cover Trim Caps

During routine maintenance, technicians or vehicle owners may remove the decorative engine cover to access spark plugs, ignition coils, valve cover components, or other engine-related parts.

Because the mounting caps are small and removable, they can easily become misplaced during servicing.

2. Cracked or Broken Plastic

Repeated exposure to engine compartment temperatures and normal aging can cause original plastic components to become brittle.

Attempting to remove an older trim cap may cause its mounting edges or retaining features to crack or break.

3. Loose or Poorly Fitting Covers

Worn or damaged retaining features may prevent the original cap from remaining securely positioned within the decorative engine cover.

4. Cosmetic Engine Bay Restoration

Missing or damaged mounting caps can make an otherwise well-maintained engine compartment appear incomplete.

Replacing these components helps restore the original appearance of the engine’s decorative trim without replacing larger assemblies.

5. Previous Maintenance or Engine Repairs

Vehicles that have undergone valve cover gasket replacements, ignition system servicing, fuel injector repairs, or other engine maintenance may have missing or damaged trim caps from previous disassembly.

Vehicle Compatibility

Designed for select BMW models equipped with compatible factory-style engine cover assemblies.

BMW E34 5 Series (1988–1995)

• BMW 520i – Select M50 Applications
• BMW 525i – M50 Engine
• BMW 525ix – Select M50 Applications

BMW E36 3 Series (1992–1999)

• BMW 320i – Select M50 Applications
• BMW 323i / 323is / 323ic – M52 Engine
• BMW 325i / 325is / 325ic – M50 Engine
• BMW 328i / 328is / 328ic – M52 Engine
• BMW M3 – Select S50 / S52 Engine Applications

BMW E39 5 Series (1996–2003)

• BMW 520i – Select M52 / M54 Applications
• BMW 523i – M52 Engine
• BMW 525i – M54 Engine
• BMW 528i – M52 Engine
• BMW 530i – M54 Engine

BMW E46 3 Series (1998–2006)

• BMW 320i / 320Ci – Select M52 / M54 Applications
• BMW 323i / 323Ci – M52 Engine
• BMW 325i / 325Ci / 325xi – M54 Engine
• BMW 328i / 328Ci – M52 Engine
• BMW 330i / 330Ci / 330xi – M54 Engine

BMW E60 / E61 5 Series (2003–2010)

• BMW 525i – Select Early M54 Applications
• BMW 530i – Select Early M54 Applications

Additional Compatible BMW Platforms

This trim cap may also be compatible with select configurations of the following vehicles:

• BMW E38 7 Series
• BMW E65 / E66 7 Series
• BMW E53 X5
• BMW E83 X3
• BMW E36/7 and E36/8 Z3
• BMW E85 / E86 Z4

Important Fitment Note: Compatibility is determined by the engine configuration, production date, and original decorative engine cover design rather than the vehicle’s chassis designation alone. Not all vehicles within the listed model ranges use the same mounting caps.

Compatible Engine Families

This replacement engine cover trim cap is intended for select applications equipped with the following BMW engine families:

• BMW M50: 2.0L / 2.5L Inline-Six
• BMW M52: 2.0L / 2.5L / 2.8L Inline-Six
• BMW M52TU: Technical Update Inline-Six
• BMW M54: 2.2L / 2.5L / 3.0L Inline-Six
• BMW S50: Select E36 M3 Applications
• BMW S52: Select E36 M3 Applications

S50 / S52 Fitment Note: On certain E36 M3 engine configurations, this cap is used on the fuel injector rail cover only. The decorative valve cover may require a different, larger mounting cap.

Please verify your existing cap dimensions and OEM reference number before ordering.

OEM Reference Information

BMW Original Equipment Reference Number:

• 11121726089
• 11-12-1-726-089
• 11 12 1 726 089

Component Description: Engine Cover Trim Cap / Mounting Nut Cover

Application: Decorative Valve Cover Trim / Fuel Injector Rail Cover

Installation Location: Engine Compartment

Replacement Type: Factory-Style Direct Replacement

Important: The OEM reference number is provided for identification and compatibility purposes. This product is a replacement component and is not represented as a genuine BMW-manufactured part unless specifically stated.

Installation Information

This replacement trim cap is designed for straightforward installation on compatible BMW engine cover assemblies.

Unlike mechanical engine repairs, replacing a missing decorative mounting cap generally does not require specialized tools or extensive disassembly.

General Installation Procedure:

1. Allow the engine to cool completely before working within the engine compartment.
2. Locate the missing or damaged mounting cap on the decorative valve cover trim or fuel injector rail cover.
3. If an existing cap is damaged, carefully remove it without damaging the surrounding engine cover.
4. Inspect the mounting opening and remove any broken plastic fragments or debris.
5. Confirm that the replacement cap matches the original mounting opening and retaining configuration.
6. Align the replacement cap with the corresponding opening.
7. Gently press the cap into position until properly seated.
8. Verify that the replacement sits flush with the surrounding decorative engine cover.

Installation Note: Avoid applying excessive force during installation. If the cap does not seat correctly, verify the mounting dimensions and engine cover configuration before proceeding.

Quantity & Replacement Information

Many BMW M50, M52, and M54 engine configurations utilize multiple mounting caps across the decorative valve cover and fuel injector rail cover.

Depending on the engine configuration, up to four matching caps may be required to replace all corresponding mounting covers.

Certain S50 and S52 applications use two of these caps on the fuel injector rail cover, while the valve cover utilizes a different cap design.

Customers replacing multiple missing or damaged caps should inspect their existing engine cover configuration to determine the correct quantity.

What’s Included

• 1 × BMW Engine Cover Trim Cap / Mounting Nut Cover

OEM Reference: 11121726089

Please Note: This listing includes one replacement trim cap unless a different quantity is specifically selected. Decorative engine covers, mounting nuts, bolts, and additional engine components are not included.

Important Product Information

Decorative Component Only: This product is intended to conceal mounting hardware on compatible BMW engine cover assemblies. It does not replace the engine’s actual valve cover, valve cover gasket, cylinder head components, or fuel injection hardware.

Engine Cover Compatibility: Different BMW engine configurations may utilize different cap sizes or mounting designs. Customers should compare their existing trim cap and engine cover mounting opening with the product photos before ordering.

No Performance Modification: This component is intended for cosmetic restoration and replacement of missing or damaged decorative trim. It does not alter engine performance, fuel delivery, or mechanical operation.

Fitment Assistance: If you are unsure whether this product is compatible with your BMW, please contact BAVMODS® with your vehicle’s year, model, engine configuration, and a photo of the existing engine cover.

Restore the Factory Appearance of Your BMW Engine Bay

Maintaining the appearance of your BMW extends beyond exterior paint and interior trim. Small details within the engine compartment contribute to the overall presentation of a properly maintained vehicle, particularly on older BMW models undergoing restoration or preventative maintenance.

Missing or deteriorated engine cover caps can leave exposed mounting hardware and create an unfinished appearance, even when the surrounding engine components remain in excellent condition.

The BAVMODS® BMW M50/M52/M54 Engine Cover Trim Cap Replacement offers a simple, affordable way to restore these frequently overlooked details while preserving your vehicle’s original decorative engine cover assemblies.

Whether you’re completing an engine bay restoration, replacing components lost during maintenance, or refreshing the appearance of your BMW’s inline-six engine, this replacement cap helps bring back the clean, factory-style finish your vehicle was designed to have.

Restore the details. Preserve the original appearance. Keep your BMW looking its best with BAVMODS®.

Please refer to the “Fitment” section in the product description for compatibility details.