EURORELIC

21 53 2 229 715 –Hydraulic unit with pressure accumulator – E46 M3

NLA newchecked 2026-09-28source: bmwpartsdeal.commarket: US+EU

BMW part number 21 53 2 229 715 (21532229715) is the Hydraulic unit with pressure accumulator – E46 M3, a drivetrain part catalogued for the E46 (M3, M3 CSL). As of our last check (2026-09-28, bmwpartsdeal.com), BMW lists it as no longer available new (NLA). 3 kit or reman options, 2 repair guides below.

  1. 1 New from BMW
    No longer available new (per source; may be market-specific).
  2. 2 Aftermarket new
    No sourced aftermarket equivalent yet
  3. 3 Used / NOS
    Search live listings on eBay US/DE.
  4. 4 Interchange
    No cross-model match in our data
  5. 5 Kit / reman
    3 kit or service options
  6. 6 Community fix
    2 forum workarounds (repair, retrofit), single-thread reports
  7. 7 DIY guide
    2 repair how-tos linked (forum, article, video)
  8. 8 Paid hunt
    We search dealers, breakers and forums for you.

Buy new

Not available new from the US or the European dealer we checked. BMW Classic or another dealer may still locate one with your VIN.

View 21532229715 at bmwpartsdeal.comCross-reference 21532229715 on RealOEMCatalog diagram (bmwfans.info)

Aftermarket options (0)

No sourced aftermarket equivalent recorded yet. We only list brand numbers that a brand catalog or vendor page explicitly cross-references to this BMW number.

Where to buy

Every link opens 21532229715 at that seller: “View” = the part’s own page, “Look up” = the seller’s part-number page, “Search” = the seller’s search pre-filled with the number. You can order from either region.

United States

Europe (DE · UK · DK)

“Ships internationally” is shown only where we read it on the vendor’s own shipping page (checked 2026-09-28); otherwise check with the vendor. Import duties and taxes are the buyer’s responsibility. Amazon links carry our Associates tag, so we may earn a commission; other seller links are not affiliate links today.

Used & NOS listings

Cross-model interchange (0)

No interchange recorded. That doesn't prove there isn't one; it means we have no sourced match yet.

Community fixes (2)

What owners did when this part was unobtainable, summarised from forum threads. Read the thread before you start. These are owner reports, not verified by EuroRelic or BMW.

RetrofitDifficulty: HardOne thread

Convert the E46 M3 from SMG to the 6-speed manual

Rather than chase NLA SMG hydraulic units and control units, owners convert to the 6-speed manual. A detailed DIY (originally from M3Forum, reposted on NA M3 Forums) says it is not much harder than a clutch job on jack stands. The key part is a manual-transmission bellhousing (the SMG one lacks the self-centering springs and detents) or a machined SMG bellhousing. Plan pedals, clutch hydraulics and coding too. The thread has a full BMW part-number list with prices.

Parts / numbers mentioned: 6MT bellhousing; 23111222979, 23311228393, 23142229113 (gear switch), Pentosin MTF2 83220309031

Repair / rebuildDifficulty: HardSingle report

E46 M3 SMG pump motor dying: swap in the commutator and bearing from an E46 ABS/DSC pump motor

When the SMG pump motor's commutator wears through (it drops out of gear when hot and shows the cog light), one owner opened the motor and fitted the commutator from a junkyard E46 ABS/DSC pump motor of the same size. He also used that motor's bearing (identical to the SMG one) and cleaned and reused the original brushes. He called it experimental but successful. Others note aftermarket motors (Burkhart, MLR) wear the same way, and an old pump usually needs seals and sensors too.

Parts / numbers mentioned: E46 ABS/DSC pump motor (donor commutator + bearing); Burkhart, MLR motors

Kits, reman & retrofits (3)

Rebuild kit
E46 M3 SMG II hydraulic pump rebuild (BMW 21532229715 / 21532282257; new temp + pressure sensors, seals; optional new motor; refundable core)
GTE Engineering
$2,480
View product page on gte-engineering.com ↗
Replacement kit
E46 M3 SMG II hydraulic pump motor kit (motor, temp sensor, hydraulic oil, grease; incl. CSL)
Burkhart Engineering (via IND)
$629
View product page on ind-distribution.com ↗
Reman / repair service
E46 M3 SMG pump repair service (lifetime warranty; shown as backordered when checked)
Remanx (UK)
$608 ex VAT
View product page on remanx.com ↗

DIY

No DIY route recorded yet.

Repair guides & how-tos (2)

Write-ups and videos from owners, forums and specialists on removing and fitting this part. Summaries are ours; follow the link for the full steps, photos and torque values, and credit goes to the original author.

Forum DIYNA M3 ForumsDifficulty: Mediumwritten for E46

SMG pump removal from the top ↗

Owners explain that the SMG hydraulic unit can be removed from above without lifting the car; the pump harness connector is reached by turning the wheels to full lock, and the skid plate may need to come off.

Q&A thread rather than a full write-up.

by chalaka + replies · nam3forum.com· link checked 2026-10-08
Forum DIYNA M3 ForumsDifficulty: Hardwritten for E46

DIY: SMG Pump Rebuild DIY ↗

Photo write-up of stripping and resealing the E46 M3 SMG hydraulic pump/accumulator assembly with a universal Viton O-ring kit and new gear-shaft seals; the accumulator splines must be re-greased on reassembly.

Tools mentioned: Viton O-ring kit, gearshaft seals, clutch spline grease

by Good (forum member) · nam3forum.com· link checked 2026-10-08

Notes & sources

bmwpartsdeal (US) marks discontinued; bmwfans ETK data does not flag it. Last listed $6638.65 on bmwpartsdeal (not orderable).