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4 Series
Replacement Part (New)

Rear Bumper Assembly Kit (M Sport) – BMW 4 Series F32 / F36 (14–20)

SKU: 51128044934-A
R 7,750.00

The BMW 4 Series M Sport Rear Bumper Assembly Kit is a complete factory-spec body replacement and conversion package engineered specifically for the 1st-generation BMW 4 Series range (F32 Coupé, F33 Convertible, and F36 Gran Coupé). Designed to convert standard SE or Modern/Luxury Line models to the aggressive, track-inspired styling of the factory M Aerodynamics Package (Option Code S715A)—or serve as an exact insurance-grade replacement for collision repair—this modular kit restores crisp factory panel gaps and underbody airflow alignment.

Manufactured from high-grade, flexible Polypropylene (PP)—matching original factory structural standards—the primary bumper skin resists thermal expansion, minor parking impact fractures, and stone chipping. Delivered factory pre-primed, the bumper shell incorporates pre-moulded Park Distance Control (PDC) sensor bosses for plug-and-play transfer of the original parking distance control system. The assembly includes an interchangeable lower diffuser valance featuring single-side twin exhaust tip cutouts (optimized for 418i, 420i, 428i, and 430i models), slim red reflectors, and a tethered tow eye cover cap.

Vehicle Compatibility & Fitment Notes: Direct-fit rear bumper conversion and replacement assembly engineered specifically for BMW 4 Series models produced between 2014 and 2020:

  • BMW 4 Series Coupé (F32 Chassis): 2014–2020 (418i, 420i, 428i, 430i, 435i, 440i, 418d, 420d, 425d, 430d, 435d xDrive)

  • BMW 4 Series Convertible (F33 Chassis): 2014–2020 (420i, 428i, 430i, 435i, 440i, 420d, 425d, 430d, 435d xDrive)

  • BMW 4 Series Gran Coupé (F36 Chassis): 2015–2020 (418i, 420i, 428i, 430i, 435i, 440i, 418d, 420d, 425d, 430d, 435d xDrive)

Kit Assembly Breakdown & OE Reference Cross-References:

  • 1. Main Bumper Cover Skin (Primed with PDC): High-impact flexible polypropylene outer skin provided pre-primed, featuring integrated PDC sensor rings and inner guide rails.

    • OE Reference Part Number: 51128056499 / 51 12 8 056 499 (Catalog alternate: 51128044934 / 51128073078)

  • 2. M Performance Style Lower Rear Diffuser Valance: Matte black aerodynamic lower insert featuring a single-sided twin exhaust cutout layout (left-side dual tips) and side mesh insert accents.

    • OE Reference Part Number: 51192339218 / 51 19 2 339 218

  • 3. Safety Bumper Reflector Inserts (Left & Right): Slim red reflector lenses engineered to snap directly into the mid-section recessed bumper slots.

    • OE Left Reflector: 63147295541 / 63 14 7 295 541

    • OE Right Reflector: 63147295542 / 63 14 7 295 542

  • 4. Tow Hook Access Flap Cover: Circular plastic access cap equipped with an internal retaining lanyard to cover the chassis recovery point.

    • OE Reference Part Number: 51128056615 / 51 12 8 056 615

Key Features & Highlights:

  • OEM-Grade Polypropylene Material: Flexible impact polymer provides structural resilience against cracking under low-speed parking impacts or severe thermal cycles.

  • Modular Valance Architecture: Removable lower diffuser allows effortless future upgrades to dual-side (435i/440i) or quad-pipe exhaust configurations without replacing the main bumper skin.

  • Factory PDC Integration: Factory-positioned sensor bosses ensure proper sensor depth alignment for smooth, code-free Parking Distance Control operation.

  • Pre-Primed Surface Prep: Smooth factory primer coat reduces sanding labor and body shop paint prep time.

1.Vehicle Preparation & Light Disassembly:Safe lifting and tail light cluster removal.

Safely raise the vehicle on a two-post hydraulic lift or rated ramp stands. Open the boot/trunk lid, pull back the inner trunk carpeting side lining, and remove the plastic thumb nuts securing the left and right rear LED tail light units. Pull the light clusters rearward and disconnect their wiring plugs.

2.Lower & Inner Liner Fastener Removal:Unbolting lower tray and inner arch fasteners.

Remove the inner rear wheel arch liner screws on both sides to expose the hidden vertical bumper-to-fender mounting bracket bolts. Unbolt the lower plastic underbody tray and heat shield Torx screws along the bottom lip of the bumper reinforcement bar.

3.Bumper Cover Skin Removal:Releasing side clips and PDC harness plug.

With an assistant, use a plastic trim wedge to release the outer bumper side guide rails beneath the rear quarter panels. Gently pull the bumper skin outward from the body. Reach behind the left wheel arch apron to disconnect the main PDC sensor wiring loom connector and license plate light plugs before pulling the bumper clear.

4.Component Transfer & Bumper Reassembly:Swapping sensors, diffuser, and final alignment.

Move the stock bumper to a padded workbench. Transfer the PDC sensors and wiring loom into the pre-moulded holder rings of the new primed M Sport bumper cover (51128056499). Snap the lower diffuser valance (51192339218) and red reflectors (63147295541 / 63147295542) securely into the cover. Reattach the assembled bumper skin onto the quarter panel rails, connect all wiring, torque top and bottom fasteners, attach the tow eye cap (51128056615), and reinstall the tail light units.

Specifications:

  • Part Name: Rear Bumper Assembly Kit / M Sport Style Rear Body Package

  • Placement on Vehicle: Exterior Rear, Center

  • Styling Package: M Aerodynamics Package

  • Material: High-Flex Automotive Polypropylene (PP)

  • Finish: Factory Primed Bumper Cover / Matte Black Diffuser Valance

  • PDC Configuration: Integrated Holder Rings for Factory Parking Distance Control Sensors

  • Exhaust Cutout Configuration: Single-Sided Twin Outlet (Left Side Dual Tips)

  • Product Line: Exterior Body Shell & Conversion Assemblies

  • Condition: Brand New Replacement / Retrofit Package

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Rear Bumper Assembly Kit (M Sport) – BMW 4 Series F32 / F36 (14–20)
Rear Bumper Assembly Kit (M Sport) – BMW 4 Series F32 / F36 (14–20)
R 7,750.00
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Enquiring about: Rear Bumper Assembly Kit (M Sport) – BMW 4 Series F32 / F36 (14–20)

Delivery Options

Local Express Delivery  (Coming Soon)

Available within 20km of a MYTY Auto Parts branch, with a target turnaround of 120 minutes from order confirmation AND PAYMENT

Free Delivery

Applies to all orders over R8,500 to standard destinations. Free shipping applies to standard-sized items only. Oversized, heavy-duty, or bulky items are excluded and may incur additional courier charges. Customers are encouraged to request a custom shipping quote prior to placing an order for such items.

Free delivery applies to main provincial city centres only. Remote areas are excluded unless serviced by the designated courier. Orders qualifying for free shipping are dispatched within 2 to 7 business days after payment reflects. If a correctly supplied item is returned, a handling fee applies and return shipping is for the buyer's account.

Standard Courier Delivery

MYTY Auto Parts chooses between Overnight Delivery and Economy Freight for standard orders. If a customer specifies a particular mode of transport, any additional cost is for the customer's account. On free delivery purchases, customers may arrange their own courier to speed up delivery, provided this is planned with MYTY Auto Parts in advance. No compensation is offered for such self-arranged courier collections.

Delivery Timeframes

Metropolitan areas: standard courier timeframes apply. Regional areas (more than 50km from a metropolitan area): 1 to 2 business days. Remote areas (more than 100km from a metropolitan area): 3 to 7 business days. International orders: 14 to 30 working days, subject to courier and customs clearance.

Delivery times exclude weekends and public holidays. Weekend or public holiday deliveries can be arranged at additional cost. Delivery dates are estimates only and time of delivery is not of the essence. The buyer may cancel an order without liability if delivery is more than 30 days late. Overnight deliveries can occasionally be delayed due to circumstances on the courier's side. MYTY Auto Parts cannot be held responsible for such delays.

Excluded and Restricted Areas

The following are excluded from standard delivery and may attract additional charges or require special arrangements: mines, plots, farms, and game reserves; national parks, universities, and power stations; and other rural areas requiring special trips. To avoid extra charges, customers may elect to collect their goods from the nearest Post Office, courier depot, or PostNet branch in their region.

Receiving Your Order

Inspect goods on receipt before signing the courier's documents. Confirm the correct quantity has been received and that items are free of damage. Any damage or shortage must be reported on the waybill at the time of delivery to avoid delays in processing claims. Written notice of non-delivery must be provided within 5 days of the date the goods would ordinarily have been received.

Risk, Insurance and Ownership

Risk in the goods passes to the buyer upon delivery. Title in the goods remains with MYTY Auto Parts until the invoice is paid in full. Buyers must insure goods against theft or damage until the price has been paid in full. Insurance is not automatically included. Customers may request insurance if needed.

Failed or Refused Deliveries

If the buyer fails to take delivery at the agreed time, MYTY Auto Parts may cancel or suspend further deliveries and charge for any loss suffered. If goods cannot be delivered, MYTY Auto Parts may store them, or have them stored by a third party, at the buyer's cost.

Branch Collection

Customers may also collect orders directly from MYTY Auto Parts branches.

Durban: 6 Acaciafield Close, Springfield, Durban | +27 78 684 3454 | Trading hours: Monday to Friday, 8:00 AM to 5:00 PM.

How returns and refunds are handled at MYTY Auto Parts.

MYTY Auto Parts wants customers to shop with confidence. The sections below set out when returns are accepted, who pays for return shipping, and the conditions items must meet to qualify for a refund, exchange, or credit.

1. If MYTY Auto Parts Sends the Wrong Part

  • MYTY Auto Parts covers the cost of return shipping.
  • Once the item is received back in original, unused, resalable condition, the correct part will be dispatched at no extra charge.

2. If You Order the Wrong Part

  • Return shipping is for the buyer's account.
  • Returns are only accepted if the item is unused, in its original packaging, and resalable.
  • Items showing signs of installation, damage, contamination, or wear will not qualify.
  • If a return is rejected, the buyer may either collect the item or pay for re-shipping.

3. General Return Conditions

  • Return requests must be communicated within 5 days of purchase.
  • Items must be securely packaged (for example, with bubble wrap) with all contents included. Poorly packaged returns that arrive damaged will be rejected.
  • Price-based returns (for example, finding the same item cheaper elsewhere) are not accepted under the Consumer Protection Act.
  • All returns are subject to inspection and approval by MYTY Auto Parts management.

4. Restocking Fees

  • Standard correctly-supplied returns: a 15% restocking fee is deducted from the refund amount.
  • Special Orders (non-stock items ordered specifically for the customer): a 20% restocking fee may apply, at the discretion of MYTY Auto Parts.
  • Refunds are processed using the same payment method as the original purchase (EFT to EFT, card to card, cash to cash).

5. Electrical and Electronic Items

  • All electrical and electronic products are tested before dispatch.
  • Due to manufacturer policies, no returns are accepted on electrical or electronic items once dispatched.
  • Electronics are not returnable once fitted. Claims require a certified diagnostic report confirming the fault prior to purchase. Generic fault codes from handheld diagnostic readers are not accepted.

6. Special Products

Android Radios

  • Returns must be requested within 5 days of receipt and include all packaging and accessories.
  • No cash refunds are issued. Store credit may be offered at MYTY Auto Parts' discretion.
  • Courier charges are non-refundable.
  • Items returned without a fault will be rejected and shipping costs are for the customer.
  • Return and warranty claims are processed within 30 days of receipt.

7. International Orders

  • International orders are non-stock items ordered or manufactured specifically on request, with delivery typically in 14 to 30 working days.
  • Refunds will not be issued where goods have been withheld indefinitely by SARS Customs or other law enforcement.

8. Risk and Ownership

  • Risk transfers to the buyer upon delivery or collection. Customers are encouraged to insure goods if needed.
  • Items remain the property of MYTY Auto Parts until paid in full.

9. How to Initiate a Return

Contact MYTY Auto Parts within 5 days of purchase. Quote your invoice number and reason for the return. A reference number must be obtained before goods are returned.

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