Powerflex PFR5-721 Rear Subframe / Rear Axle Carrier Mount Insert Bushes/Bushings (Pair) for BMW 5 Series E61 Touring Estate Wagon - Polyurethane Poly Bush Upgrade - OE 33316770826 - Diagram 21

Powerflex PFR5-721 Polyurethane Insert Kit for BMW E61 5 Series Touring

Transform the rear end of your BMW E61 estate with this performance polyurethane insert kit. Designed to reinforce the rear axle carrier mounts, these inserts reduce unwanted movement in the rear cradle, tighten up chassis control and deliver a more connected, confidence-inspiring drive. Ideal for drivers who want sharper handling, improved traction and better stability without the cost of a full bush replacement.

We run these inserts on our own cars and customer builds, and the feedback is consistently excellent. Expect a more planted rear, cleaner power delivery out of bends and more predictable braking, with minimal change to comfort. A simple, effective suspension upgrade for spirited road use.

Key details

• Part number: PFR5-721
• Vehicle: BMW 5 Series E61 Touring, rear axle carrier rear mounts
• Pack contents: 2 polyurethane inserts
• OE cross reference: 33316770826
• Diagram reference: 21
• Note: Inserts fit into the voids of the original rubber mount. For a complete replacement bush use PFR5-722.

What you will feel

• Reduced rear cradle movement and better rear-end support
• Sharper turn-in, stronger traction and improved high-speed stability
• More consistent alignment and tyre contact, helping tyre life
• Fast-road ready performance with excellent NVH control
• Cost-effective handling upgrade with a Lifetime Warranty

Why this compound works

Correctly engineered polyurethane resists deformation far better than ageing rubber. By filling the cavities in the factory bush, these inserts control flex at the rear axle carrier while retaining the isolation of the original mount. The result is a tighter, more precise chassis that still rides well.

Fitting and support

These inserts install into the existing rubber mounts and are a straightforward upgrade when the factory bushes are serviceable. If the OEM mount is cracked or perished, choose the full replacement option PFR5-722. Professional installation is recommended and all fixings should be torqued at normal ride height.

Need fitting or advice? Book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

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