🔧 550i - Engine Mount Replacement

Worn engine mounts can cause vibration at idle, clunks on acceleration/braking, and excessive engine movement. On your 550i, the mounts sit low on each side of the engine and the engine must be safely supported before the mounts are removed.

Difficulty Level: Advanced | Estimated Time: 4-7 hours

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⚠️ Safety & Precautions

• 🛑 Support the engine before loosening mounts; the engine can drop suddenly.
• 🔥 Let the engine and turbos cool fully; hot exhaust parts can burn you.
• 🧯 Keep hands clear of pinch points while raising/lowering the engine.
• 🔋 Disconnect the negative battery terminal to reduce short-risk near wiring.
• 🧱 Use jack stands; never work under a car supported only by a jack.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Mechanic gloves
• Wheel chocks
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Engine support bar (specialty)
• Block of wood (2x6)
• Socket set 8mm-24mm
• Deep socket set 13mm-18mm
• E-Torx socket set E10-E18
• Torx bit set T25-T60
• Ratchet 3/8"
• Breaker bar 1/2"
• Extensions 3", 6", 12"
• Universal joint adapter 3/8"
• Trim clip removal tool
• Torque wrench 10-200 Nm
• Paint marker
• Work light

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Engine mount (left) - Qty: 1
• Engine mount (right) - Qty: 1
• Engine mount mounting bolts/hardware kit - Qty: 1
• Underbody fastener/clips assortment - Qty: 1

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the rear wheels.
• Open the hood and remove any loose items from the engine bay.
• Disconnect the negative battery terminal using a 10mm socket.
• Plan how you’ll support the engine: an engine support bar (specialty) spans the fenders and holds the engine from above so mounts can be removed safely.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise the car and remove the lower covers

• Lift the front of the car with a floor jack and support it on jack stands.
• Remove the front lower splash shield/undertray using an 8mm socket and Torx T25/T30 as needed.
• Use a trim clip removal tool for plastic clips to avoid breaking them.

Step 2: Install the engine support bar

• Set the engine support bar (specialty) across the strut tower areas per its instructions.
• Hook the support bar to the engine lifting point(s), then take up slack until the chain is snug.
• Snug only—do not lift the engine yet.

Step 3: Create working room around each mount

• From below, identify each engine mount (one on each side) between the engine bracket and the front subframe.
• Move any blocking panels/brackets out of the way using the appropriate E-Torx sockets and 13mm/16mm sockets.
• If a fastener feels “springy,” stop and reposition—this usually means the engine weight is still on the mount.

Step 4: Support the engine slightly from below (backup support)

• Place a block of wood (2x6) on the pad of the floor jack.
• Gently contact the wood to a strong flat area of the engine (not thin plastic covers).
• Do not jack on the oil pan directly; the wood spreads the load and reduces damage risk.

Step 5: Remove the left engine mount fasteners

• Use the engine support bar to lift the engine just enough to unload the mount (usually a few millimeters).
• Loosen/remove the mount-to-subframe fastener(s) using a 16mm-18mm socket (varies by hardware).
• Loosen/remove the mount-to-engine-bracket fastener(s) using an E-Torx socket or 16mm socket (varies by hardware).
• Remove the mount by working it out through the available space; use a work light and extensions/universal joint for tight angles.

Step 6: Install the new left engine mount

• Compare the new mount to the old one (height/shape/stud locations) before installing.
• Position the new mount in place, then start all fasteners by hand to prevent cross-threading.
• Lower/raise the engine slightly with the engine support bar until the bolts thread in smoothly.
• Torque all engine-mount fasteners to BMW specification using a torque wrench 10-200 Nm.
• If your replacement hardware includes “torque-to-yield” bolts (single-use), install new bolts only and follow the included torque-angle instructions.

Step 7: Repeat removal/installation for the right engine mount

• Repeat Step 5 and Step 6 on the opposite side using the same tools.
• Use a paint marker to mark bolt heads after final torque so you know what’s finished.

Step 8: Reinstall any brackets and underbody panels

• Reinstall any removed braces/shields using the same E-Torx/socket you removed them with.
• Reinstall the undertray using an 8mm socket and Torx T25/T30.
• Torque fasteners snug (undertray hardware is typically low-torque; don’t strip plastic).

Step 9: Reconnect the battery and lower the vehicle

• Reconnect the negative terminal using a 10mm socket.
• Remove the engine support bar.
• Lower the car safely using the floor jack and remove jack stands.

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✅ After Repair

• Start the engine and let it idle; check for excessive vibration or any knocking.
• With the hood open, lightly rev the engine and watch for abnormal engine movement.
• Test drive gently: accelerate, coast, and brake; listen for clunks that weren’t there before.
• Recheck the undertray area for any loose fasteners or rubbing after the first drive.

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💰 DIY vs Shop Cost

Shop Cost: ₹35,000-₹80,000 (parts + labor)

DIY Cost: ₹12,000-₹35,000 (parts only)

You Save: ₹23,000-₹45,000 by doing it yourself!

Shop labor rates vary but typically run ₹1,500-₹3,500/hour. This repair takes a shop approximately 4-7 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.