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Details
| Specification | Value |
|---|---|
| Brand | HART |
| Fitting Position | Rear Axle |
| Fitting Position | Rear |
| Thickness [mm] | 30.0 mm |
| Inner Diameter [mm] | 14.0 mm |
| Outer Diameter [mm] | 47.0 mm |
OE numbers (6)
Search by this OE number to find compatible parts
- MERCEDES-BENZ—124 352 41 65
- MERCEDES-BENZ—124 352 77 65
- MERCEDES-BENZ—124 352 92 65
- MERCEDES-BENZ—A124 352 41 65
- MERCEDES-BENZ—A124 352 77 65
- MERCEDES-BENZ—A124 352 92 65
Where this part fits
Original-fit position for OE A1243529265.
About this product
HART Mounting Differential (421 638) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Fitting Position: Rear Axle, Fitting Position: Rear, Thickness [mm]: 30, 0 mm, Inner Diameter [mm]: Nylon, 0 mm, Outer Diameter [mm]: 47, 0 mm — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Compatible with MERCEDES-BENZ vehicles; use the vehicle selector above to confirm exact fitment for your make, model, and engine variant. Fitment data is sourced from TecDoc, the authoritative European parts catalogue. This part supersedes original equipment references: 124 352 41 65, 124 352 77 65, 124 352 92 65, A124 352 41 65 and 2 more. Matching these numbers confirms a like-for-like replacement with no loss of function. HART is a recognised supplier of automotive replacement components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
No equivalent parts found.
Mounting Differential HART 421 638 — compatible car models
| Car models | MERCEDES-BENZ: 124 Convertible (A124), 124 Coupe (C124), 124 Saloon (W124), 124 T-Model (S124), E-CLASS T-Model (S124) |
|---|---|
| Engines | 300 CE-24 (124.061); 200 CE (124.040); 200; 200 T (124.080); E 300 T Turbo-D 4-matic (124.393) |
| Year of manufacture | 1984-1996 |
| Manufacturer article number (MPN) | 421 638 |
| OE part numbers | 124 352 41 65, 124 352 77 65, 124 352 92 65, A124 352 41 65, A124 352 77 65, A124 352 92 65 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
HART 421638 . Fitting Position: H. Fitting Position: HA. Inner Diameter [mm]: 14,0 mm. Outer Diameter [mm]: 47,0 mm. Thickness [mm]: 30,0 mm
- 1x Mounting Differential
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 business days
- Order before 5pm — ships the next working day
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Mounting Differential compatible with my car?
This Mounting Differential fits MERCEDES-BENZ vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this HART Mounting Differential have?
This HART Mounting Differential has the following specifications: Fitting Position: HA; Fitting Position: H; Thickness [mm]: 30,0 mm; Inner Diameter [mm]: 14,0 mm; Outer Diameter [mm]: 47,0 mm. Check the full specifications table above for complete details.
What OE part numbers does this Mounting Differential replace?
This Mounting Differential replaces OE part numbers: 124 352 41 65, 124 352 77 65, 124 352 92 65, A124 352 41 65, A124 352 77 65, A124 352 92 65. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Mounting Differential cost?
This HART Mounting Differential is available for £4.99. Mounting Differential prices vary depending on brand, specifications, and vehicle compatibility. HART parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Mounting Differential?
Regular inspection of your Mounting Differential is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a Mounting Differential?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Mounting Differential fitted by a professional mechanic.
Can I use this part as a replacement for OE 124 352 41 65?
Yes, this HART Mounting Differential is a direct replacement for OE part number 124 352 41 65. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
